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Almost .1v drop on 12V rail under load

post #1 of 12
Thread Starter 
Hello I have a Seasonic 750 Certified Gold power supply. I have been contacting EVGA because I have been experiencing hard locks causing my computer to reset during gaming with my replacement card. It happens at least once a day. I got this power supply after my original card was sent in. Back to the topic, on idle the 12V rail sits at 12.288 and never moves. When I run OC Scanner X with AI Suite monitor at my desktop the voltage switches between 12.288 and 12.192. The support person said that is something to be concerned about? Here is what he said:

"It’s important to note that the reading in the BIOS is an idle reading at best. Ideally, 11.95~12.05 is where we prefer to see the voltage at, under load a higher or lower reading is understandable, however at idle…It’s concerning to say the least as the reading you provided is almost at 12.3, if under load it’s getting to 12.192 that’s almost a .1v drop and anything beyond .05v is not safe."

What do you think? When the computer crashes and restarts I get BlueScreen Error 116 but when it crashes there is no blue screen and is usually accompanied with a blank screen of a certain color and a sound loop. I thought it would be onboard audio but I got a sound card and disabled onboard audio in my bios and removed all traces of HD Audio with driver sweeper. I have also tried removing NVIDIA drivers and sweeping AMD display (just in case) and NVIDIA display then doing a clean install of drivers but same problem.
post #2 of 12
The values you are reporting are perfectly normal, more so, if we were to take the values and info provided by the support person, as valid, we should simply deem 99% of the units on the market as Unsafe, since 0.05v drop on 12v means <0.5% regulation... and the units that can do that can be counted on the fingers of one hand. smile.gif

It could be the PSU, but it's not regulation related (as the EVGA gentleman suggested)... at least if the values you provided are correct, which is a big if since these are software measurements, aka guesses.
I would first check the memory (run memtest) and then the SSD.
post #3 of 12
Thread Starter 
Thanks for the reply. Hmm I guess it might be the graphics card then.. This is getting kind of ridiculous. This would be the third replacement if that is the case. I have ran memTest a few days ago and no errors with 6 passes. How would I go about troubleshooting the SSD? Also as a side note, I do not have this problem with my old 6850 although it doesn't require as much as power as a 670.
post #4 of 12
Quote:
Originally Posted by Mikusboi View Post

Thanks for the reply. Hmm I guess it might be the graphics card then.. This is getting kind of ridiculous. This would be the third replacement if that is the case. I have ran memTest a few days ago and no errors with 6 passes. How would I go about troubleshooting the SSD? Also as a side note, I do not have this problem with my old 6850 although it doesn't require as much as power as a 670.
Actually there's not much difference between the 6850 and 670, power wise. smile.gif

The simplest way to check your SSD is to run the system without it... either install the OS on a HDD and run some test (games, benchmarks, etc) with the SSD removed from the system... or just mirror the SSD on a HDD partition (should be faster than full system installation/setup). But if you're saying your issues aren't present with the ATI card, I'd say it's not the SSD either... it's most likely the VGA.
Just return it and get a 7970, it's much better and costs about the same. wink.gif
post #5 of 12
Sounds like the GPU to me - those PSU voltages sound absolutely fine. Is the BSOD (when it happens) in the GPU drivers? Possibly in nvlddmkm.sys ?

If there's an overclock on anything, take it off, then as Original Sin said, run memtest and some prime blends and small FFTs as well to eliminate the RAM and CPU from consideration. If it's stable doing that for a good long time (like overnight), then only crashes gaming or running heaven or some other GPU benchmark, I'd RMA the GPU.
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1TB Samsung Spinpoint F3 2TB Samsung Spinpoint F4 Asus BW-12B1LT Custom loop with external radbox 
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Windows 7 Ultimate x64 Crossover 27Q LED-P Crossover 27Q LED-P Optoma GT720 
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post #6 of 12
Thread Starter 
Yes that is exactly what shows in the bluscreenview along with two dx files. I ran HeavenUnigine for 2 passes,OC Scanner X for 30 minutes, and 3DMark11 extreme preset and no artifacts or crashes occurred. I did memtest a couple days ago for 6 passes (around 8 hours) and there were no errors. I also removed my 2500k overclock and still occurs. And yeah I would really rather have a 7970 at this point lol. I don't think I can return it though can I? I've had 670 for about half a year now and have replaced it twice.
post #7 of 12
Thread Starter 
Could this be a possible solution?
http://en.kioskea.net/faq/6210-nvlddmkm-sys-bsod
post #8 of 12
Thread Starter 
Well it turns out that driver sweeper removes that file anywho. I'm quite positive it is the graphics card now. The same exact thing happened in my brothers computer which is otherwise perfectly fine with his 670 FTW and same PSU.
post #9 of 12
Yeah it really does sound like the GPU. You could try underclocking it using afterburner, and see if it's stable then. If it's stable with a 10 or 20% underclock, but not at stock speed, then it is definitely the GPU. If it's unstable when underclocked, it still could well be the GPU, in either case I'd RMA it but testing that first may let you establish for certain that it is the problem.
Project Obselete
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i7 2600k @ 4.6GHz Asus Maximus IV Extreme R9 290 R9 290 
RAMHard DriveHard DriveHard Drive
16GB G-Skill DDR3 1600MHz 256GB Samsung 830 SSD 512GB Samsung 830 SSD 256 GB Samsung PB22-J SSD 
Hard DriveHard DriveOptical DriveCooling
1TB Samsung Spinpoint F3 2TB Samsung Spinpoint F4 Asus BW-12B1LT Custom loop with external radbox 
OSMonitorMonitorMonitor
Windows 7 Ultimate x64 Crossover 27Q LED-P Crossover 27Q LED-P Optoma GT720 
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Corsair AX1200i Coolermaster HAF X Asus Xonar D2X Highpoint RocketRAID 2680 
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Project Obselete
(20 items)
 
  
CPUMotherboardGraphicsGraphics
i7 2600k @ 4.6GHz Asus Maximus IV Extreme R9 290 R9 290 
RAMHard DriveHard DriveHard Drive
16GB G-Skill DDR3 1600MHz 256GB Samsung 830 SSD 512GB Samsung 830 SSD 256 GB Samsung PB22-J SSD 
Hard DriveHard DriveOptical DriveCooling
1TB Samsung Spinpoint F3 2TB Samsung Spinpoint F4 Asus BW-12B1LT Custom loop with external radbox 
OSMonitorMonitorMonitor
Windows 7 Ultimate x64 Crossover 27Q LED-P Crossover 27Q LED-P Optoma GT720 
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Corsair AX1200i Coolermaster HAF X Asus Xonar D2X Highpoint RocketRAID 2680 
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post #10 of 12
Thread Starter 
Yeah I probably will just end up sending it in for a replacement card. There just always seems to be something wrong with one when I get it.
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