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post #31 of 51 Old 06-13-2012, 12:20 AM - Thread Starter
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Originally Posted by renethx View Post

Noctua NF-R8 PWM

What is the difference between the link you posted and these other 2 models on Amazon that are both Noctua NF-R8 as well? Are there multiple versions of the R8 or are these the same product?

http://www.amazon.com/Noctua-NF-R8-80mm-Fan-CFM/dp/B000S95RWE/ref=pd_cp_pc_0

http://www.amazon.com/Noctua-NF-R8-Raised-Blade-design-Bearing/dp/B002CQTYL6/ref=pd_cp_pc_1

Is this the same version on Newegg?

http://www.newegg.com/Product/Product.aspx?Item=N82E16835608006
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post #32 of 51 Old 06-13-2012, 12:40 AM
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Originally Posted by StinDaWg View Post

Aren't those 37 and 47 CFM numbers rated at full speed though? I've increased the stock Delta fan I have to 5000 RPM just for testing purposes, and it sounds like a jet engine revving up for takeoff. There is no way anyone could live with something that loud. It has to run at ~1500 before it's acceptable and I have it at the lowest it will go which is 1100 now. I guess what I'm getting at is if I'm never going to run the fan at full speed what does it matter what the CFM rating is?
Generally speaking thicker the fan, the blades have more bite and will move more air at same RPM. I venture to guess the Delta fans when slowed to 2000 RPM and below, they will be very similar to Gelid. Gelid and Dynatron list noise figures in their datasheets at different RPM but Delta doesn't.

Dynatron has two sets of very similar fans, K650 vs K666 and T357 vs T459. In both case the later use slower turning fans at 12V and 100% PWM duty cycle for lower noise. I have the K666, T357 and T459.

I doubt there is much secret source in making a quieter fan. I suggest you to just try a new fan. Yes, I take great interest in quiet fans and have a passively cooled HDPlex H3 case. Almost all of my case fans are thermistor controlled type.
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post #33 of 51 Old 06-13-2012, 12:46 AM
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Quote:
Originally Posted by StinDaWg View Post


What is the difference between the link you posted and these other 2 models on Amazon that are both Noctua NF-R8 as well?

Non-PWM and PWM. Make sure to select NF-R8 PWM. The CPU fan connector of some mb supports both PWM fan control and voltage fan control. But it supports only PWM fan control in many mb. I don't know your mb, though. Technologically PWM is better than voltage control, of course.

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post #34 of 51 Old 06-13-2012, 01:19 AM - Thread Starter
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Is the Noctua worth the extra $5-7 over the other models? As long as it's less than $20 and will be quiet I don't mind spending the cash, but I noticed a lot of the reviews on Newegg of people saying the Nuctua wasn't any quieter than the other models. Don't know if they had unrealistic expectations or what. My Delta at 1100 RPM is already quiet enough so anything more will be worth it to me.

Also, shouldn't I consider the non PWM Noctua as well? That version can be slowed to 800 RPM with the ULNA adapter. My motherboard might be capped at 1100 RPM and that's why I can't get my Delta to go any slower, I don't know.
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post #35 of 51 Old 06-13-2012, 01:49 AM
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The Noctua moves more airflow per rpm and noise than the other 80mm PWM fans (no real data though smile.gif), at least much better than a 70x70x20mm fan at 1100rpm. For your reference,

 

SPCR's Fan Round-Up #2: 120mm Fans

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The best fan of the bunch was the Noctua, which overcame our skepticism and lived up to its hype by producing more airflow at lower speeds. Its airflow-to-noise ratio is its best feature, which gives it enough of an edge to make up for its slightly rougher noise character. The Noctua has seen recommendations around the web, and we have no qualms about adding our own to the list.
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post #36 of 51 Old 06-13-2012, 01:58 AM
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Quote:
Originally Posted by StinDaWg View Post

Also, shouldn't I consider the non PWM Noctua as well? That version can be slowed to 800 RPM with the ULNA adapter. My motherboard might be capped at 1100 RPM and that's why I can't get my Delta to go any slower, I don't know.

 

The lowest rotation speed depends on the highest one. If your mb can lower the AFC0712DD 5000 rpm to 1100 rpm, then it should be able to lower the Noctua 1800 rpm down to 1800 rpm x 1100 rpm / 5000 rpm = 400 rpm. NF-R8 PWM runs at 300 rpm just fine (another advantage of PWM over voltage control).

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post #37 of 51 Old 06-13-2012, 07:41 AM
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The BCM RX67Q MB in my server with a G530T CPU only limits the CPU to min 2000 RPM even when I move the threshold temp up and duty cycle down to 10%. So the CPU is running at 25deg C. I contacted the support team and they didn't offer any solutions. Meanwhile the thermal controlled chassis fan is running at 900 RPM.
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post #38 of 51 Old 06-14-2012, 12:27 PM - Thread Starter
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I'm pretty much set on getting the Noctua NF-R8 PWM now. It's only a few more dollars than the others ($16.95 shipped at Amazon). Now I just need to figure out how to mount it since it won't fit the 70mm bracket I have. Any suggestions? Should I just remove the bracket and mount it directly to the heatsink? I have rubber bands, 3m double sided tape, electrical tape, zip ties, hair ties.

Also, should I install the low noise adapter to lower max RPM from 1800 to 1300, or should I just install normally and use Speedfan to limit the speed? Some reviewers claimed of the adapter getting too hot, but I don't know how true that is. Which way is better/safer?

p.s. I had a hell of a time finding the PWM model at a fair price besides Amazon. I know it's fairly new but none of the usual suspects sell it. Only 1 seller on ebay and it's overpriced.
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post #39 of 51 Old 06-16-2012, 02:06 PM - Thread Starter
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Any suggestions?
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post #40 of 51 Old 06-16-2012, 11:25 PM
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Quote:
Originally Posted by StinDaWg View Post

Thanks for the recommendation. What made you choose that model over the million others out there? I read the reviews on Newegg and the overwhelming majority complained that it was extremely difficult to install, taking up to an hour in some cases and needing an extra hand. Did you have any problems? The stock one in there now in extremely easy to take in and out. It just screws down on all 4 corners and that's it. I've never replaced a heatsink before but I don't understand what could be so difficult. I don't see the 4 feet like mine on the one you posted so I'm not sure how it gets secured. The 70mm fan I have right now is almost touching the side grill as well, but the fan faces the front of the case not the side. I don't know if it would fit either but right now I have the case off anyways because it runs too hot after I set the fan to 1100 RPM. The CPU is at ~65-70C under 10-20% cpu usage. Some people in the reviews said it only gave them a few degree improvement over stock while others said 20+ so I don't know what to believe.
The thing I care about most is making it as quiet as possible. The computer is 5 years old so if it eventually dies due to heat then I've got my moneys worth and I'll just get something else.
What made it the only choice is that it was the only fan that doubled as a case fan. The fan intake is no more than a quarter-inch from the side case grille and draws outside air in and blows it down not only on the CPU cooler but on the motherboard components as well.

The S3XXX series has a problem with overheating due to poor cooling. I believe this to be due to lack of a case fan, and this unit solves that problem.

One difference in my case is that I've installed an aftermarket mini-ITX (Foxconn H67S) and Sandy Bridge 35-watt CPU, so the fan is perfectly positioned with regards to the side case grill. Any further towards the rear, and some of the airflow will be blocked.

I did not find this fan difficult to install, but then again I have an Intel board.

Edit: the 35-watt Sandy Bridge CPU is around 40C with the fan at 1200-1300 RPM after an hour of typical usage.

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post #41 of 51 Old 06-17-2012, 01:50 AM
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Quote:
Originally Posted by StinDaWg View Post

I'm pretty much set on getting the Noctua NF-R8 PWM now. It's only a few more dollars than the others ($16.95 shipped at Amazon). Now I just need to figure out how to mount it since it won't fit the 70mm bracket I have. Any suggestions? Should I just remove the bracket and mount it directly to the heatsink? I have rubber bands, 3m double sided tape, electrical tape, zip ties, hair ties.
Also, should I install the low noise adapter to lower max RPM from 1800 to 1300, or should I just install normally and use Speedfan to limit the speed? Some reviewers claimed of the adapter getting too hot, but I don't know how true that is. Which way is better/safer?
p.s. I had a hell of a time finding the PWM model at a fair price besides Amazon. I know it's fairly new but none of the usual suspects sell it. Only 1 seller on ebay and it's overpriced.


I would use epoxy glue. (First use rubber bands or similar to attach the fan temporarily and see how it goes.)

 

You don't have to use low noise adapter; control the fan speed by PWM (via SpeedFan). Downvoltage by a registor always emits heat and not a clever idea. PWM switches power on and off rapidly, that causes little power loss.

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post #42 of 51 Old 06-17-2012, 01:52 AM
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I wouldnt glue it just in case that thing ever gives out you are stuck with the fan on the heatsink. I typically see guys use zipties in a ghetto mod thread on a computer forum I am part of.
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post #43 of 51 Old 06-17-2012, 02:02 AM
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Well, when the fan stops working in 10-20 years later, perhaps the PC is terribly outdated. smile.gif Zipties is a good idea.

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post #44 of 51 Old 06-30-2012, 11:51 PM - Thread Starter
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Well, I installed the Noctua and to my disappointment the fan is just a hair too wide to close the side panel, but more importantly there is still a buzzing noise coming from my pc mad.gif. After further inspection the only other noise coming from inside is the power supply. I opened the case and removed the small fan to see if that was the problem and the whooshing and vibrating noise went away but there is still an electrical noise coming from the PSU that I can hear plain as day from 8 feet away that's driving me mad.

At this point I have to make a decision to replace the stock PSU (it is 5 years old) or just scrap this and buy a new pc. I'm looking at a deal on a barebones Brazos nettop that is going for around $130 that I can just swap my SSD into, but it only has an AMD E-350 and 6310 gpu, so I would actually be stepping down in cpu and graphics performance (would lose vector adaptive for 1080i which is a huge deal to me) but also have a smaller, quieter, and lower power pc.

PSU selections for this slimline don't seem to be all that great, and going by reviews on Newegg they all seem to suffer from noise, exactly what I'm not looking for. The only other option I found that makes sense is getting a PicoPSU. It would run about $75 for the 160 watt+power brick model, almost as much as just getting a new barebones. I'm not sure if it is compatible with my motherboard but since I have a pretty standard AMD Athlon X2 setup I'm assuming it is. Do you think this PicoPSU which claims to be 100% silent would finally solve my quest for a quiet pc? If so do I need the top of the line 160 watt model or could I get away with something lower?

http://www.mini-box.com/picoPSU-160-XT-192W-Adapter-Power-Kit
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post #45 of 51 Old 07-01-2012, 01:17 AM
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Quote:
Originally Posted by StinDaWg View Post

Well, I installed the Noctua and to my disappointment the fan is just a hair too wide to close the side panel, but more importantly there is still a buzzing noise coming from my pc mad.gif. After further inspection the only other noise coming from inside is the power supply. I opened the case and removed the small fan to see if that was the problem and the whooshing and vibrating noise went away but there is still an electrical noise coming from the PSU that I can hear plain as day from 8 feet away that's driving me mad.
At this point I have to make a decision to replace the stock PSU (it is 5 years old) or just scrap this and buy a new pc. I'm looking at a deal on a barebones Brazos nettop that is going for around $130 that I can just swap my SSD into, but it only has an AMD E-350 and 6310 gpu, so I would actually be stepping down in cpu and graphics performance (would lose vector adaptive for 1080i which is a huge deal to me) but also have a smaller, quieter, and lower power pc.
PSU selections for this slimline don't seem to be all that great, and going by reviews on Newegg they all seem to suffer from noise, exactly what I'm not looking for. The only other option I found that makes sense is getting a PicoPSU. It would run about $75 for the 160 watt+power brick model, almost as much as just getting a new barebones. I'm not sure if it is compatible with my motherboard but since I have a pretty standard AMD Athlon X2 setup I'm assuming it is. Do you think this PicoPSU which claims to be 100% silent would finally solve my quest for a quiet pc? If so do I need the top of the line 160 watt model or could I get away with something lower?
http://www.mini-box.com/picoPSU-160-XT-192W-Adapter-Power-Kit

I got the Pico 150-XT for my A6 HTPC. I LOVE it. I was able to pull the internal PSU and add a HUGE and silent Thermaltake HSF for the CPU. I've turned off everything in my home theater except the HTPC, and from 8 ft you cannot hear it.

Looky here!
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post #46 of 51 Old 07-01-2012, 11:55 AM - Thread Starter
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Did you buy the power brick that is bundled with it or did you use a different one? I've read a few isolated reports that the power brick they got on the higher watt models was giving off a whining noise at idle. The worst thing I could do at this point is spend $75 and be stuck with no improvement in noise. I guess that's the catch though you won't really know what it will sound like in your system until you try.
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post #47 of 51 Old 07-01-2012, 02:23 PM
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That PSU should be just a TFX format used in 1U servers. They are readily available for less than $40 from 150W-300W.
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post #48 of 51 Old 07-01-2012, 05:24 PM
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Quote:
Originally Posted by StinDaWg View Post

Did you buy the power brick that is bundled with it or did you use a different one? I've read a few isolated reports that the power brick they got on the higher watt models was giving off a whining noise at idle. The worst thing I could do at this point is spend $75 and be stuck with no improvement in noise. I guess that's the catch though you won't really know what it will sound like in your system until you try.

I got the one bundled with it. No noise to speak of.

Looky here!
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post #49 of 51 Old 07-01-2012, 05:36 PM
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This thread is precisely the reason that I recommend against buying an off the shelf PC.
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post #50 of 51 Old 07-01-2012, 10:53 PM - Thread Starter
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To throw a wrench into this whole scenario, I installed the low voltage adapter that came with the Noctua just for the hell of it, and now the fan is running at 750 RPM vs 850 before. The electrical noise is still there but it doesn't seem as loud as before. It doesn't matter what speed I run the fan at the noise is always there, even at 0 RPM, but whatever noise was coming from the pc is slightly reduced with the low voltage adapter plugged into the PWM motherboard connector. It makes no sense and I still don't understand where the whining is coming from. I guess it just could be coil whine coming from the motherboard and in that case there probably isn't anything I can do. The noise doesn't sound the same from different areas in the room either. It's more pronounced off to the side but direct on it doesn't sound as high pitched.
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post #51 of 51 Old 07-02-2012, 06:21 PM
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Quote:
Originally Posted by StinDaWg View Post

To throw a wrench into this whole scenario, I installed the low voltage adapter that came with the Noctua just for the hell of it, and now the fan is running at 750 RPM vs 850 before. The electrical noise is still there but it doesn't seem as loud as before. It doesn't matter what speed I run the fan at the noise is always there, even at 0 RPM, but whatever noise was coming from the pc is slightly reduced with the low voltage adapter plugged into the PWM motherboard connector. It makes no sense and I still don't understand where the whining is coming from. I guess it just could be coil whine coming from the motherboard and in that case there probably isn't anything I can do. The noise doesn't sound the same from different areas in the room either. It's more pronounced off to the side but direct on it doesn't sound as high pitched.

Buzzing caps on the motherboard?

Looky here!
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