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post #1711 of 2269 Old 07-15-2013, 09:56 PM
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Quote:
Originally Posted by robnix View Post

You shouldn't be able to do that without an adapter. The connectors aren't keyed the same nor do they have the same pinout. GPU power shouldn't plug into the EPS power and vice versa.

http://www.playtool.com/pages/psuconnectors/connectors.html#eps8
They don't:

mod the power cable. here are the steps:
- buy an 8 pin PCI express extension ( this way the psu 8 pin PCI express connector left untouched). cut it somewhere in the middle depending the length of wires needed.
- cut the 8 pin or 4 pin cpu connector from the original psu (you will not be able to use the old psu after this).
- connect them together. DANGER: make sure you are connecting the proper rails for the desired proper 8 pin EPS +12 volt power cable or 4+4 pin +12 volt power cable.
refer it here http://www.playtool.com/pages/psuconnectors/connectors.html

this is what I did to my H8DME-2. I transfer it to an old case that only have 650W PSU with limited EPS connectors and it is working fine. Again just MAKE SURE you are connecting the proper rails. I did not do this in my supermicro case:D. it is already setup with a new MB/CPU/RAM. I just don't want to put my H8DME-2 into waste.
If you want to do this in your supermicro case, don't plug the HDD backplane to be on the safe side.

Or follow what Killroy is saying a very very good advice.

just my 2 cents.
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post #1712 of 2269 Old 07-16-2013, 06:33 AM
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Quote:
Originally Posted by kishine View Post

mod the power cable. here are the steps:
- buy an 8 pin PCI express extension ( this way the psu 8 pin PCI express connector left untouched). cut it somewhere in the middle depending the length of wires needed.
- cut the 8 pin or 4 pin cpu connector from the original psu (you will not be able to use the old psu after this).
- connect them together. DANGER: make sure you are connecting the proper rails for the desired proper 8 pin EPS +12 volt power cable or 4+4 pin +12 volt power cable.
refer it here http://www.playtool.com/pages/psuconnectors/connectors.html

this is what I did to my H8DME-2. I transfer it to an old case that only have 650W PSU with limited EPS connectors and it is working fine. Again just MAKE SURE you are connecting the proper rails. I did not do this in my supermicro case:D. it is already setup with a new MB/CPU/RAM. I just don't want to put my H8DME-2 into waste.
If you want to do this in your supermicro case, don't plug the HDD backplane to be on the safe side.

Or follow what Killroy is saying a very very good advice.

just my 2 cents.

As I mentioned in my previous post, there are adapters that will do this for you. No need to ruin a power supply.

http://www.newegg.com/Product/Product.aspx?Item=N82E16812706006&nm_mc=KNC-GoogleAdwords&cm_mmc=KNC-GoogleAdwords-_-pla-_-Internal+Power+Cables-_-N82E16812706006&gclid=CKO38pqQtLgCFUFyQgodwXkA5g
or
http://www.frozencpu.com/products/8687/cab-158/8_8-pin_EPS_to_62-Pin_PCI-Express_Adapter_Cable_CB-E8-P68F.html

Looky here!
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post #1713 of 2269 Old 07-17-2013, 12:19 AM
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this power supply will only be for my machine, so i just soldered the correct end in, easy peasy.
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post #1714 of 2269 Old 07-19-2013, 02:22 AM
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I finally got the chance to work with my AIC server earlier, looks like I may have a defective SAT-MV8 controller card. The card didn't pick up when I looked in Device Manager, so I shut the server down and put it in a different slot and booting it back up the card was detected. Of course after doing another reboot the card once again wasn't detected. The other two controller cards are fine though.

If anyone has an extra MV8 card they're willing to spare, let me know!
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post #1715 of 2269 Old 07-19-2013, 02:37 AM
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Quote:
Originally Posted by AVTechMan View Post

I finally got the chance to work with my AIC server earlier, looks like I may have a defective SAT-MV8 controller card. The card didn't pick up when I looked in Device Manager, so I shut the server down and put it in a different slot and booting it back up the card was detected. Of course after doing another reboot the card once again wasn't detected. The other two controller cards are fine though.

If anyone has an extra MV8 card they're willing to spare, let me know!


I'll be dumping the guts of my server including all 3 SAT2-MV8 cards on Ebay.Would you take all 3 cards for $100 with free shipping biggrin.gif
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post #1716 of 2269 Old 07-19-2013, 05:09 AM - Thread Starter
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Quote:
Originally Posted by AVTechMan View Post

I finally got the chance to work with my AIC server earlier, looks like I may have a defective SAT-MV8 controller card. The card didn't pick up when I looked in Device Manager, so I shut the server down and put it in a different slot and booting it back up the card was detected. Of course after doing another reboot the card once again wasn't detected. The other two controller cards are fine though.

If anyone has an extra MV8 card they're willing to spare, let me know!

Call Tamsolultions... They should be able to help... And probably at no cost.

The world ends when you're dead. Until then, you got more punishment in store. Stand it like a man -- and give some back.

~ Swearengen
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post #1717 of 2269 Old 07-19-2013, 08:24 AM
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I have one of the tams 846 servers and am trying to figure out if I have a computer problem or an unraid problem. When transferring from drive to drive on the server I am getting about 25MBs. If I transfer from a win7 box across a gigabit connection I get 60-80MBs. Could the problem be with the SAT2-MV8 controllers? If it makes a difference I am still loading the array so there is no parity drive assigned yet. I came across the problem when I mounted a drive using snap thinking it would be faster loading the array from a drive on the server, didn't work out so good. Any ideas?

thanks

Bob
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post #1718 of 2269 Old 07-22-2013, 01:38 PM
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I have a question regarding electricity usage on the servers.

As of yet I don't have a Kill-o-watt meter to measure usage, but I am planning to get a rackmount UPS later this week, and I was looking to get a 900-watt model. Would that be enough to power 2 servers (AIC and the SM) during an outage, and 16-port gigabit switch? I am sure the wattage may increase once hard drives are added but as of right now all of the bays are currently empty. I don't think a 400w UPS will be enough, plus I have not modified any of the servers, other than replacing the PSU in the SM with the energy efficient one.
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post #1719 of 2269 Old 07-22-2013, 01:51 PM
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Quote:
Originally Posted by AVTechMan View Post

I have a question regarding electricity usage on the servers.

As of yet I don't have a Kill-o-watt meter to measure usage, but I am planning to get a rackmount UPS later this week, and I was looking to get a 900-watt model. Would that be enough to power 2 servers (AIC and the SM) during an outage, and 16-port gigabit switch? I am sure the wattage may increase once hard drives are added but as of right now all of the bays are currently empty. I don't think a 400w UPS will be enough, plus I have not modified any of the servers, other than replacing the PSU in the SM with the energy efficient one.

it may be enough for a couple of minutes but i am unsure about an extended period of time, i know just one of my psus are 730 watts so i imagine i would need something almost twice that size to get any usable time.
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post #1720 of 2269 Old 07-22-2013, 02:14 PM
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Quote:
Originally Posted by davidtt485 View Post

it may be enough for a couple of minutes but i am unsure about an extended period of time, i know just one of my psus are 730 watts so i imagine i would need something almost twice that size to get any usable time.

I wouldn't need an extended runtime, even just 10 minutes would be enough to simply shut down both servers properly.
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post #1721 of 2269 Old 07-24-2013, 07:05 AM
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Quote:
Originally Posted by AVTechMan View Post

I wouldn't need an extended runtime, even just 10 minutes would be enough to simply shut down both servers properly.

http://www.csgnetwork.com/upssizecalc.html

This site shows a 1750 VA being recommended for 800 watts, if your running two of these than double that.
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post #1722 of 2269 Old 07-24-2013, 02:09 PM
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Quote:
Originally Posted by davidtt485 View Post

http://www.csgnetwork.com/upssizecalc.html

This site shows a 1750 VA being recommended for 800 watts, if your running two of these than double that.

Thanks for that info, I will need to order a Kill-O-Watt meter to where I can get a more accurate reading of what the server will be pulling. Then can decide accordingly. I may end up running just one server for now and decide from there.
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post #1723 of 2269 Old 07-24-2013, 04:18 PM
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I am curious about another thing regarding the SM servers with the AMD boards..would anyone know whether its compatible with Hyper-V for virtualization? I know there's Esxi but its more picky on the hardware side. Id thought to give Hyper V a shot.
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post #1724 of 2269 Old 07-25-2013, 02:14 AM
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Finally ripped the guts out of mine.Dropped in a Supermicro X9DR3-F,single Intel E5-2620 and 32GB's of Kingston ECC memory.Still waiting on a few more things before it's up and running as my ESXi host.I'm very pleased with the chassis.I like it more than the Norco 4224 which I also have.


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post #1725 of 2269 Old 07-27-2013, 01:12 AM
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Guys, anyone know the processor recommendations on these for Transcoding with Plex?
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post #1726 of 2269 Old 07-27-2013, 08:50 AM
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Originally Posted by maxse View Post

Guys, anyone know the processor recommendations on these for Transcoding with Plex?

Plex recommends 2.4Ghz Core2 Duo. Plex simply grabs every core it can to start transcoding, spikes the CPU, fills the buffer, then the CPU usage drops down to enough so it can keep the buffer going without interruption.

I run my plex servers on an ESX 5.1 server, so out of curiosity I tested what happens with plex and 4 clients added in over about 10 minutes, all transcoding.

The VM is running 64 bit Debian linux and has 4 cores and 4GB RAM assigned, the CPU on the host is a XEON X5650 running at 2.67Ghz.

The clients were my local web browser, an android phone, and two android tablets. All the clients except my desktop were streaming over Wireless N.

The movies are 1:1 bluray rips to MK; Amelie, Zombieland, Baraka, and Wreck It Ralph.

It's pretty straightforward what happens. Plex transcoded the movies on the phone and tablets down to 1024x576, the browser movie was playing at a 940x480. Each movie started in about 5 seconds. The time to start transcoding stream 4 was not perceptibly different than stream 1. Memory usage never went above approximately 3.2GB.

Chart time!

First movie - plex grabs all 4 cores to buffer and transcode, spikes the CPU, then settles down.
Second movie - plex spikes the CPU again, then settles down.
Third movie, plex spikes the CPU, then settles down, however you can see total CPU Usage rising.
Fourth movie, plex spikes the CPU, CPU stays maxxed until I stop Baraka, then it drops.

tawill likes this.

Looky here!
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post #1727 of 2269 Old 07-27-2013, 01:39 PM
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Wow thanks for the explanation.

Ony issue is that I have the AMD version of the super micro case. So I don't know what that translates to in terms of the recommended intel specs.

Will I need to add a second cpu? Also I saw some reference to what I think are energy efficient AMD cpus in this thread? But I can't tell for sure...

What do you guys think?

My plans are to place a corsair 850W CPU and 3 140mm fans to keep it quiet. I want it to be as energy efficient as possible.. I will be running unraid.
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post #1728 of 2269 Old 07-27-2013, 04:22 PM
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Quote:
Originally Posted by maxse View Post

Wow thanks for the explanation.

Ony issue is that I have the AMD version of the super micro case. So I don't know what that translates to in terms of the recommended intel specs.

Will I need to add a second cpu? Also I saw some reference to what I think are energy efficient AMD cpus in this thread? But I can't tell for sure...

What do you guys think?

My plans are to place a corsair 850W CPU and 3 140mm fans to keep it quiet. I want it to be as energy efficient as possible.. I will be running unraid.

You should be fine with any recent 2+Ghz AMD CPU, worst case you find out that you have buffering issues and you have to buy an upgrade.

Looky here!
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post #1729 of 2269 Old 07-28-2013, 06:20 AM
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Got my Dual core based SM server a while a go but didn't get a chance to work on it until yesterday. First order of business was to gut it out:
clear.jpg 76k .jpg file
Had to spend 15min with the nibler to cut out the raised section which holds the original fan wall but it wasn't a big deal.

Then I installed the new fans: 3x Arctic F12 PWM 120mm in the middle + 2x Arctic F8 PWM 80mm in the back
fans.jpg 99k .jpg file

For the ones in the middle I used the Norco fan wall. Had to drill and tap a few holes on the norco fan wall but it is nicely mounted and stable now:
fans_front.jpg 87k .jpg file

Had to drill out mounting holes on the back for the new fans as well:
fans_back.jpg 77k .jpg file

If anyone is interested in the guts let me know. I'd rather pass them all as one to someone over dealing with ebay. I'll take any reasonable offer. The guts include the H8DME-2 MB with CPU mounted on it, 4 sticks of 2GB ECC ram, 3x AOC-SAT2-MV8 HBA boards with all 24 sata cables, two PSUs, 5 very loud fans, dual PSU mounting bracket and PSU board. Everything as it came from the box. I powered it once to make sure everything starts. I also have a Norco RPC-250 which holds my current server, if anyone is interested.
guts.jpg 184k .jpg file

Now it is time to put the content of my current machine in this beast of a case.
Attached Images
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File Type: jpg fans.jpg (98.7 KB, 39 views)
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post #1730 of 2269 Old 07-29-2013, 01:17 PM
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Quote:
Originally Posted by davidtt485 View Post

http://www.csgnetwork.com/upssizecalc.html

This site shows a 1750 VA being recommended for 800 watts, if your running two of these than double that.

Okay, I finally got my Kill-O-Watt meter today, and did the measurements of both the AIC server and the SM server. Power draw from the wall for the AIC server unmodified pulled about 275 watts, including the 16-port switch. The SM server with the 80+ Gold redundant PSU and the original stock fans ran about 160 watts. That was with no hard drives as of yet.

According to what i have read you would buy a UPS based on the VA rating, not necessarily on the wattage. I had ordered this: CyberPower 700VA Rackmount UPS and should arrive tomorrow. By then I will know what this unit can do.
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post #1731 of 2269 Old 07-30-2013, 02:59 PM
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That might be a bit too close when you add the drives. Each drive will add on average 7-8W (depending on drive, of course), so the ups might not be able to hold it while the system is shutting down. It also lacks PFC which if you have on the PSU, it will probably not work at all at holding a charge. FWIF I'm using CP1500PFCLCD for my server. If you want rackmount, I recommend OR1500PFCRT2U.
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post #1732 of 2269 Old 07-31-2013, 08:41 AM
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Looks like Tam has some of the first system available on Ebay for $149.99

http://www.ebay.com/itm/AIC-Chassis-SATA-24-Bay-X7DBE-X-Xeon-DC-1-86GHz-6GB-DDR2-SIMLC-SAT2-MV8-Server-/171091213753?pt=COMP_EN_Servers&hash=item27d5d4bdb9

Quote:
Chassis: AIC 24 Bay
Motherboard: X7DBE-X
Processor: Intel Dual Core E5120
Speed: 1.86Ghz
RAM: 6GB (2x2GB, 2x1GB) Fully Buffered DDR2
Hard Drive: None included.
Optical Drive: None
3 x SAT2-MV8 Raid Controller Cards
IPMI Card: Kira 100 SIMLC
Power Supplies: Qty 3 Emacs M1W-6500P
Condition: Used, has some rack rash, otherwise good physical condition overall.
Operational Condition: Powers on and works great.
Warranty: No DOA, must notify us within 48 hours of receiving.
Includes: Server and 3 power cords.
ISSUES: There are no issues with this server.
Software: None installed, no COA.

We have sold these in the past, some of our previous buyers have done some modifications and you can see them in the following thread. Also we have a large quantity available.
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post #1733 of 2269 Old 07-31-2013, 08:14 PM
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Question #1: When using PC2-5300 memory, does anyone know if the H8DME-2 motherboard can handle over 32GBs?

The SuperMicro Manual says it can handle up to 128GB. http://www.supermicro.com/aplus/motherboard/opteron2000/mcp55/h8dme-2.cfm

Crucial page says Max:32GB if you use PC2-5300 http://www.crucial.com/store/listparts.aspx?model=H8DME-2

I have 32GBs now with 8 slots free. Would like to add more. My BIOS is updated FWIW.

======================================================================
Question #2: Does anyone happen to have comparison #'s with a kill-a-watt on the SM system with:

stock PSUs

vs

ATX PSU

and optionally vs

the quieter replacement PWS-920P-1R


I'm trying to do a cost analysis on the 3 options. Stock meaning I put up some walls and a door around this beast! hahaha.

======================================================================
Lastly,

For those looking for rails, I went a slightly different option, that worked out really well, and was fairly cheap.

APC OM-756H rails. Ebay usually has them for around $25-35 shipped. They are more than strong enough as the APC UPS they are made for weighs in 200+ pounds. They aren't a perfect replacement, as I had to leave 1 of the 4 corners unbolted from my rack so I could swing it out a bit while I slid the case in. But once everything is bolted in, they are very strong, secure, and steady.
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post #1734 of 2269 Old 08-01-2013, 12:17 AM
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Quote:
Originally Posted by kireol View Post

Question #1: When using PC2-5300 memory, does anyone know if the H8DME-2 motherboard can handle over 32GBs?

The SuperMicro Manual says it can handle up to 128GB. http://www.supermicro.com/aplus/motherboard/opteron2000/mcp55/h8dme-2.cfm

Crucial page says Max:32GB if you use PC2-5300 http://www.crucial.com/store/listparts.aspx?model=H8DME-2

I have 32GBs now with 8 slots free. Would like to add more. My BIOS is updated FWIW.

======================================================================
Question #2: Does anyone happen to have comparison #'s with a kill-a-watt on the SM system with:

stock PSUs

vs

ATX PSU

and optionally vs

the quieter replacement PWS-920P-1R


I'm trying to do a cost analysis on the 3 options. Stock meaning I put up some walls and a door around this beast! hahaha.

======================================================================
Lastly,

For those looking for rails, I went a slightly different option, that worked out really well, and was fairly cheap.

APC OM-756H rails. Ebay usually has them for around $25-35 shipped. They are more than strong enough as the APC UPS they are made for weighs in 200+ pounds. They aren't a perfect replacement, as I had to leave 1 of the 4 corners unbolted from my rack so I could swing it out a bit while I slid the case in. But once everything is bolted in, they are very strong, secure, and steady.


Question 1.
I have 4 lots of this memory with the original memory from TAMS. 40 GB in total, memtest+ for a week turns no error.
- Samsung 8GB (2 x 4GB), ECC, 2Rx4 PC2-5300P, M393T5160QZA-CE6

Question 2.
... this would be interesting to know.
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post #1735 of 2269 Old 08-01-2013, 04:40 AM
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Quote:
Originally Posted by kishine View Post

Question 1.
I have 4 lots of this memory with the original memory from TAMS. 40 GB in total, memtest+ for a week turns no error.
- Samsung 8GB (2 x 4GB), ECC, 2Rx4 PC2-5300P, M393T5160QZA-CE6

Question 2.
... this would be interesting to know.

Thanks. Looks like I'll be keeping an eye on more memory now. I'm running ubuntu. Everything went so well, I figured I'd throw up a bunch of VMs on the box using virtualbox or something similar.
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post #1736 of 2269 Old 08-01-2013, 09:52 AM
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Quote:
Originally Posted by AVTechMan View Post

Okay, I finally got my Kill-O-Watt meter today, and did the measurements of both the AIC server and the SM server. Power draw from the wall for the AIC server unmodified pulled about 275 watts, including the 16-port switch. The SM server with the 80+ Gold redundant PSU and the original stock fans ran about 160 watts. That was with no hard drives as of yet.

According to what i have read you would buy a UPS based on the VA rating, not necessarily on the wattage. I had ordered this: CyberPower 700VA Rackmount UPS and should arrive tomorrow. By then I will know what this unit can do.

as I know
you should buy UPS, based on watt not VA. and see the chart how many mins the UPS will hold that based on watts.

http://powerquality.eaton.com/SEA/Technology-Applications/Power-101/va-watts.asp


when I see the spec for CB (in your link), http://www.cyberpowersystems.com/products/ups-systems/smart-app-ups/rackmount-lcd/OR700LCDRM1U.html?selectedTabId=specifications&imageI=#tab-box

Runtime at Half Load (min) 11
Runtime at Full Load (min) 3
Battery Type Sealed lead-acid
Battery Size 6V/9AH
User Replaceable Yes
Typical Recharge Time 8 Hours
Replacement Battery RB0690X2
Battery Quantity 2

6V Battery is not common, 12v is pretty common.
you can have 3 min, if you are loaded with 400W(server+switch+etc)
or
11 mins for 200W load.


700VA means, your UPS will need max = 5.8A (700VA/120V); this just for cable consideration, that the cable would stand 5.8A, most cable in us are rated 10A-15A.
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post #1737 of 2269 Old 08-01-2013, 11:54 AM
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Originally Posted by cantalup View Post

as I know
you should buy UPS, based on watt not VA. and see the chart how many mins the UPS will hold that based on watts.

http://powerquality.eaton.com/SEA/Technology-Applications/Power-101/va-watts.asp


when I see the spec for CB (in your link), http://www.cyberpowersystems.com/products/ups-systems/smart-app-ups/rackmount-lcd/OR700LCDRM1U.html?selectedTabId=specifications&imageI=#tab-box

Runtime at Half Load (min) 11
Runtime at Full Load (min) 3
Battery Type Sealed lead-acid
Battery Size 6V/9AH
User Replaceable Yes
Typical Recharge Time 8 Hours
Replacement Battery RB0690X2
Battery Quantity 2

6V Battery is not common, 12v is pretty common.
you can have 3 min, if you are loaded with 400W(server+switch+etc)
or
11 mins for 200W load.


700VA means, your UPS will need max = 5.8A (700VA/120V); this just for cable consideration, that the cable would stand 5.8A, most cable in us are rated 10A-15A.

Thanks for the info. Hooking up the UPS to the SM server drew close to about 200 watts from the wall according to the meter. When I had both servers on (AIC and SM) it drew about 500 watts on the Kill-o-Watt. Of course these are before any hard drives are added. So what I have decided to do is to just connect the SM server to the UPS, which is about 45-50% load with it running currently. I'll just get another UPS later on from the link another poster suggested above.
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post #1738 of 2269 Old 08-01-2013, 02:44 PM
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Thanks for the info. Hooking up the UPS to the SM server drew close to about 200 watts from the wall according to the meter. When I had both servers on (AIC and SM) it drew about 500 watts on the Kill-o-Watt. Of course these are before any hard drives are added. So what I have decided to do is to just connect the SM server to the UPS, which is about 45-50% load with it running currently. I'll just get another UPS later on from the link another poster suggested above.
FYI.

I just picked up the Cyberpower 1500va 900w from amazon. It's on sale for $129 shipped. https://www.amazon.com/dp/B000FBK3QK/ref=as_li_qf_sp_asin_til?tag=crecarmacman-20&camp=0&creative=0&linkCode=as1&creativeASIN=B000FBK3QK&adid=0CXPPK5NFC2F4ZFBBHQY&

It's not rack mount, but works great, and I got it sitting on a $12 raxxas rack shelf. I plugged it in, installed the Cyberpower software, and Ubuntu saw it right away.

Properties:
Model Name................... CP 1500C
Firmware Number.............. BFE5107.B23
Rating Voltage............... 120 V
Rating Power................. 900 Watt

Current UPS status:
State........................ Normal
Power Supply by.............. Utility Power
Utility Voltage.............. 121 V
Output Voltage............... 121 V
Battery Capacity............. 100 %
Remaining Runtime............ 13 min.
Load......................... 333 Watt(37 %)
Line Interaction............. None
Test Result.................. Unknown
Last Power Event............. None
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post #1739 of 2269 Old 08-02-2013, 09:27 AM
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Question #1: When using PC2-5300 memory, does anyone know if the H8DME-2 motherboard can handle over 32GBs?

The SuperMicro Manual says it can handle up to 128GB. http://www.supermicro.com/aplus/motherboard/opteron2000/mcp55/h8dme-2.cfm

Crucial page says Max:32GB if you use PC2-5300 http://www.crucial.com/store/listparts.aspx?model=H8DME-2

I have 32GBs now with 8 slots free. Would like to add more. My BIOS is updated FWIW.

Hi Kireol -

This motherboard can handle up to 64GB if you use 8 more 4GB modules, and supposedly can handle up to 128GB if you use 8GB modules. The 8GB modules are rather pricey so I haven't actually tested them. I have tested up to 56GB and it works fine.

BUT... there are some issues:

1. USING BOTH GROUPS OF SLOTS: there are 2 main banks of memory: 8 slots for CPU 1 and 8 slots for CPU 2. Only the CPU next to a memory bank can access those slots. So if you have 1 CPU, you are limited to the first group of 8 slots, so 32GB is the max if you use 4GB DIMMS. If you want more than 32GB with 1 CPU, you'd have to use 8GB DIMMS. Supposedly you can mix and match different size DIMMS, but that gets rather involved also because of interleaving.

2. USING ALL SLOTS IN EITHER GROUP: if you use all 8 slots on either bank, look carefully at your system startup. To do this, you'll have to disable Quiet boot and quick boot in the BIOS. On the systems I bought (6), if you fill all 8 memory slots, the bus will throttle down from 667 to 533 MHz. I didn't want that, so left 1 slot empty. With 2GB DIMMS, this limits you to 14GB (28GB w/2 CPUs), 28/56GB with 4GB DIMMS, or 56/112GB with 8GB DIMMS. I've never tried 8GB DIMMS. There is a setting in the BIOS about using all 8 memory slots - something about higher voltage or whatever - but it didn't make any difference: the bus still went to 533MHz.

3. INTERLEAVING: as shipped, my systems had 8GB of memory: 4 DIMMS of 2GB each. They were installed in alternating slots, which disables interleaving. When accessing memory to fill a cache line, the memory controller (on the CPU) can access memory 64 bits at a time. When modules are installed in consecutive slots, cache is filled 128 bits at a time by accessing both modules simultaneously. I'm not sure why these systems were configured without interleaving, but perhaps it is because it makes them less sensitive to memory module incompatibilities. In the systems I have upgraded, I've been very careful to pair up matching memory modules. If you have mismatched modules within 1 interleave bank (2 consecutive slots make an interleave bank), you can have system hangs and other fun stuff.

4. SLOT ORDER: it's important (to me at least) to populate memory banks in order. I have run into issues when memory was installed in upper slots before lower slots were populated, even though I think it is supposed to work. To make this even more fun, make sure you notice that on the motherboard, the slot orders are reversed for the 2 main slot banks.

Good luck!
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post #1740 of 2269 Old 08-02-2013, 09:45 AM
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Hi Kireol -

This motherboard can handle up to 64GB if you use 8 more 4GB modules, and supposedly can handle up to 128GB if you use 8GB modules. The 8GB modules are rather pricey so I haven't actually tested them. I have tested up to 56GB and it works fine.

BUT... there are some issues:

1. USING BOTH GROUPS OF SLOTS: there are 2 main banks of memory: 8 slots for CPU 1 and 8 slots for CPU 2. Only the CPU next to a memory bank can access those slots. So if you have 1 CPU, you are limited to the first group of 8 slots, so 32GB is the max if you use 4GB DIMMS. If you want more than 32GB with 1 CPU, you'd have to use 8GB DIMMS. Supposedly you can mix and match different size DIMMS, but that gets rather involved also because of interleaving.

2. USING ALL SLOTS IN EITHER GROUP: if you use all 8 slots on either bank, look carefully at your system startup. To do this, you'll have to disable Quiet boot and quick boot in the BIOS. On the systems I bought (6), if you fill all 8 memory slots, the bus will throttle down from 667 to 533 MHz. I didn't want that, so left 1 slot empty. With 2GB DIMMS, this limits you to 14GB (28GB w/2 CPUs), 28/56GB with 4GB DIMMS, or 56/112GB with 8GB DIMMS. I've never tried 8GB DIMMS. There is a setting in the BIOS about using all 8 memory slots - something about higher voltage or whatever - but it didn't make any difference: the bus still went to 533MHz.

3. INTERLEAVING: as shipped, my systems had 8GB of memory: 4 DIMMS of 2GB each. They were installed in alternating slots, which disables interleaving. When accessing memory to fill a cache line, the memory controller (on the CPU) can access memory 64 bits at a time. When modules are installed in consecutive slots, cache is filled 128 bits at a time by accessing both modules simultaneously. I'm not sure why these systems were configured without interleaving, but perhaps it is because it makes them less sensitive to memory module incompatibilities. In the systems I have upgraded, I've been very careful to pair up matching memory modules. If you have mismatched modules within 1 interleave bank (2 consecutive slots make an interleave bank), you can have system hangs and other fun stuff.

4. SLOT ORDER: it's important (to me at least) to populate memory banks in order. I have run into issues when memory was installed in upper slots before lower slots were populated, even though I think it is supposed to work. To make this even more fun, make sure you notice that on the motherboard, the slot orders are reversed for the 2 main slot banks.

Good luck!

I can't thank you enough for that run-down on memory in these things. Very informative! Single CPU systems aren't that complicated. The most complicated they seem to get these days are the number of channels. With more than 1 CPU, that's a whole new world for me. So, thank you!
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