Loose video cable?
Originally Posted by blueiedgod /t/1416652/bad-cpu-or-bad-motherboard#post_22150712
Loose video cable?
Originally Posted by Ruiner /t/1416652/bad-cpu-or-bad-motherboard#post_22150721
Default HSF? VRM's getting air?
Do memtest yet?
Do you have another PSU to test with?
Originally Posted by StardogChampion /t/1416652/bad-cpu-or-bad-motherboard#post_22150613
So far I've swapped out the SSD, memory and PSU with no change in behavior. I've also built the PC outside of any case -- no change. That leaves only the motherboard and the CPU as suspects. I don't believe at all this is some kind of driver issue. The driver version doesn't matter (I've been through various reinstalls). Temps all look good (46C in Prime95) though I suspect there is some temp-related issue because today when it's 78F in here I can reproduce it very quickly whereas the other day when it was 68F in here it took 5 hours.
Originally Posted by jeffkro /t/1416652/bad-cpu-or-bad-motherboard#post_22150771
Its almost never the cpu
Originally Posted by Ruiner /t/1416652/bad-cpu-or-bad-motherboard#post_22150798
I'd still run memtest. The bySPD timings may not be stable on that board for either set of sticks.
To me, the heat issue points to mobo if your core temps are that low. I'd look at VRMs, NB first.
Was the other PSU the same model or a full size ATX?
Originally Posted by DeanM /t/1416652/bad-cpu-or-bad-motherboard#post_22151058
I had a similar situation when I upgraded my HTPC to Sandy Bridge last spring. System wouldn't boot (ran BIOS ok, but random blue screen on boot from Windows install media). Eliminated power supply and memory right away so knew it was either the motherboard or CPU. I didn't have a spare compatible motherboard or CPU, so I couldn't swap things to eliminate one or the other. After speaking with a tech at Intel and given that it is usually the motherboard, RMA'd the motherboard. New motherboard came... same problem. Intel then approved RMA on the CPU and that was the trick. So... CPUs can be bad. But usually it is the memory, or motherboard (in that order) before it is the CPU.
Originally Posted by Zon2020 /t/1416652/bad-cpu-or-bad-motherboard#post_22151316
I was down to the point of "it's either the motherboard or the cpu because I've swapped out everything else with parts that I know work" and was considering pulling the i3 out of my htpc or the i5 out of my wife's desktop to try when I decided it would be easier to just go ahead and drive up to Micro Center with the motherboard and get a new one, and if that didn't work, I'd know it was the cpu. New motherboard worked fine (thank goodness).
Originally Posted by StardogChampion /t/1416652/bad-cpu-or-bad-motherboard#post_22151343
I did order the CPU and motherboard from Amazon so at least the RMA is easy. I just did the motherboard RMA and ordered a replacement. I'll then drop in the CPU and see what happens. If it's the CPU then I'll RMA that and I'll be making that drive to MicroCenter too for a G530 or G620, whichever they have in stock.
Originally Posted by StardogChampion /t/1416652/bad-cpu-or-bad-motherboard#post_22151221
Before this spring, I'd never had to RMA anything. I've had a DOA HDD, 2 ASRock motherboards and now possibly this ASUS mobo or the Intel CPU. I think the law-of-averages is catching up with me.
Originally Posted by vkirienko /t/1416652/bad-cpu-or-bad-motherboard#post_22176879
It looks like this law is catching up with me as well.Yesterday last componenent came in and I tried to put all toghether:
ASRock H77M LGA 1155 Intel H77
Intel Pentium G620
G.SKILL Ripjaws X Series 4GB (2 x 2GB) 240-Pin DDR3
Intel 60GB 120 Series
nMediaPC HTPC 7000B
Fans are running but no video whatsoever. Tried HDMI connection, tried DVI. Removed CPU and installed it again. Tried other PSU. Pulled RAM and tried modules one by one. Nothing - black screen. Besides pulling CPU from the main computer what else I can do to check CPU/MB/RAM?
Before I RMA motherboard what else I can be missing there?
Originally Posted by Zon2020 /t/1416652/bad-cpu-or-bad-motherboard#post_22177398
Make sure the 24 pin power connector and the ATX12v1 cpu power connector are fully seated so that the clips lock. Your motherboard has an 8 pin ATX12V1 cpu power connector, but I expect your pico psu only has a 4 pin ATX12v1 supply. That's ok on this motherboard but make sure you've plugged it into the correct 4 pins. Your manual says "Though this motherboard provides 8-pin ATX 12V power connector, it can still work if you adopt a traditional 4-pin ATX 12V power supply. To use the 4-pin ATX power supply, please plug your power supply along with Pin 1 and Pin 5." page 35 of your manual.
If that's ok, the next thing I'd do is to try one stick of sdram that I know is good, preferably nice plain 1.5v 1333 SDRAM. What speed and voltage ripjaws are you using?
Last thing to try would be to pull the motherboard out and rebuild it with just the PSU, cpu, cpu fan, and one stick of sdram outside the case on a piece of cardboard, just to make sure you aren't shorting something out on the back of the motherboard in the case.