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GPU Usage dropping to Zero

post #1 of 10
Thread Starter 
Hi,

I've been having this strange problem that I don't seem to remember having when my computer was new. It's only been a couple years.

I replaced my Asus P6T Deluxe V2... which could barely OC my CPU and now I have my CPU up to 4ghz from 3.4ghz. I thought the problem was the mobo, that's not it.

I thought the problem was the 5970, but it was in repair status for 5 days this time and came back fresh from RMA. Still having the same problems on the new mobo.

So it's not the graphics card or the motherboard. GPU Usage will drop to zero during gameplay, randomly bringing the FPS to a halt, down to zero, causing the game to freeze/stutter. Also, you can see the core/memory clocks aren't staying at in-game speeds of 725/1000.. they keep going down to idle speeds 157/300.

Only thing I could think is it's the PSU. I really don't know, so I could use some advice, but that's really the only thing left. Here are two screenshots:

gpuusage1.png

rmausage2.jpg
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i7-920 @ 4.0ghz EVGA x58 SLI3 HD5970 2GB 12GB Corsair 1600mhz 
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i7-920 @ 4.0ghz EVGA x58 SLI3 HD5970 2GB 12GB Corsair 1600mhz 
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Samsung Spinpoint F3 1TB x3 Windows 7 64-bit Acer H243H 1920x1080 Logitech G15 
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post #2 of 10
Sounds like it could be a driver issue. Download the latest 12.1 AMD driver, after uninstalling the old 11.12 driver. Not sure if that will really do anything, but either way you should still download the latest driver.
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AMD Phenom ii 1090T GIGABYTE GA-990FXA-UD3 AM3+ HIS radeon hd 6770 MSI Hawk hd 5770 
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8gb G skill sniper Western Digital 500GB caviar blue Noctua NH-D14 Windows 7 Home Premium 
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AMD Phenom ii 1090T GIGABYTE GA-990FXA-UD3 AM3+ HIS radeon hd 6770 MSI Hawk hd 5770 
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8gb G skill sniper Western Digital 500GB caviar blue Noctua NH-D14 Windows 7 Home Premium 
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post #3 of 10
Thread Starter 
I do have the latest drivers, that was an old screenshot. Using 12.1. I really don't think it's the drivers though.

Off topic, sorry, but I installed a new motherboard and it is taking longer to quit out of applications now. SWTOR takes like 20 seconds, frozen on the game before it exits. Used to exit right away, i don't know it's kind of annoying me redface.gif. Could it be because of the 4ghz OC? I ran Prime95 for like 25 minutes and no errors came up.

Going to test BF3 tomorrow and see if anything has improved with the new mobo.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-920 @ 4.0ghz EVGA x58 SLI3 HD5970 2GB 12GB Corsair 1600mhz 
Hard DriveOSMonitorKeyboard
Samsung Spinpoint F3 1TB x3 Windows 7 64-bit Acer H243H 1920x1080 Logitech G15 
PowerCaseMouseMouse Pad
850W Corsair Antec 1200 Logitech G5 Alienware 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-920 @ 4.0ghz EVGA x58 SLI3 HD5970 2GB 12GB Corsair 1600mhz 
Hard DriveOSMonitorKeyboard
Samsung Spinpoint F3 1TB x3 Windows 7 64-bit Acer H243H 1920x1080 Logitech G15 
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850W Corsair Antec 1200 Logitech G5 Alienware 
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post #4 of 10
25 minutes isnt nearly enough, you have to run prime 95 for at least 8 hours, but most would suggest around 12 hours would be the best. To be honest though i dont know how that would cause the gpu usage to drop. But first i would make sure your overclock is stable for at least 8 hours on prime95 before doing anything else. What kind of motherboard do you have?
My PC
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CPUMotherboardGraphicsGraphics
AMD Phenom ii 1090T GIGABYTE GA-990FXA-UD3 AM3+ HIS radeon hd 6770 MSI Hawk hd 5770 
RAMHard DriveCoolingOS
8gb G skill sniper Western Digital 500GB caviar blue Noctua NH-D14 Windows 7 Home Premium 
PowerCase
Antec Earth Watts Series 750W Thermaltake Element G 
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My PC
(15 items)
 
  
CPUMotherboardGraphicsGraphics
AMD Phenom ii 1090T GIGABYTE GA-990FXA-UD3 AM3+ HIS radeon hd 6770 MSI Hawk hd 5770 
RAMHard DriveCoolingOS
8gb G skill sniper Western Digital 500GB caviar blue Noctua NH-D14 Windows 7 Home Premium 
PowerCase
Antec Earth Watts Series 750W Thermaltake Element G 
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post #5 of 10
Thread Starter 
Switched from defective Asus P6T Deluxe V2 to EVGA x58. Problem is my temps get to about 80c when I run Prime95... bout 65c when playing most games so I don't really want to run the cpu at 82C for 12 hours. Too hot?
My System
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CPUMotherboardGraphicsRAM
i7-920 @ 4.0ghz EVGA x58 SLI3 HD5970 2GB 12GB Corsair 1600mhz 
Hard DriveOSMonitorKeyboard
Samsung Spinpoint F3 1TB x3 Windows 7 64-bit Acer H243H 1920x1080 Logitech G15 
PowerCaseMouseMouse Pad
850W Corsair Antec 1200 Logitech G5 Alienware 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-920 @ 4.0ghz EVGA x58 SLI3 HD5970 2GB 12GB Corsair 1600mhz 
Hard DriveOSMonitorKeyboard
Samsung Spinpoint F3 1TB x3 Windows 7 64-bit Acer H243H 1920x1080 Logitech G15 
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post #6 of 10
Thread Starter 
Yeah, can't even play BF3 core/memory clocks jump down to idle speeds while i'm playing and GPU usage is too erratic it freezes/stutters all the time making an FPS unplayable. 5970 fresh from RMA as well, 2nd time I sent it in so i really don't think it's the graphics card.

My question is this, could a faulty power supply cause issues like this?
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-920 @ 4.0ghz EVGA x58 SLI3 HD5970 2GB 12GB Corsair 1600mhz 
Hard DriveOSMonitorKeyboard
Samsung Spinpoint F3 1TB x3 Windows 7 64-bit Acer H243H 1920x1080 Logitech G15 
PowerCaseMouseMouse Pad
850W Corsair Antec 1200 Logitech G5 Alienware 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-920 @ 4.0ghz EVGA x58 SLI3 HD5970 2GB 12GB Corsair 1600mhz 
Hard DriveOSMonitorKeyboard
Samsung Spinpoint F3 1TB x3 Windows 7 64-bit Acer H243H 1920x1080 Logitech G15 
PowerCaseMouseMouse Pad
850W Corsair Antec 1200 Logitech G5 Alienware 
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post #7 of 10
Quite possibly. Poor quality PSU's, while outputting what they say in Watts, don't sometimes have great stability. Stability, when talking PSU's, is how well the PSU provides a steady voltage to its individual rails. Sometimes the voltages waver and are not constant, and this can sometimes only apply to a single rail, for example if you are powering components on one rail (CPU and others) and GPU on another you may only see performance difference on that component. I had this on an OZ power supply where one rail completely died, in the exact same manner you are talking about. I had to put the GPU onto the only other rail meaning the PSU was really only being 50% efficient, luckily the PSU was fairly big, but I didn't have any more room for anything else :S

Check it out
post #8 of 10
Thread Starter 
Check it out meaning buying a new power supply? :O

I bought a PSU Tester and everything came out fine afaik.

You can't return power supplies... can you? Stupid question probably.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-920 @ 4.0ghz EVGA x58 SLI3 HD5970 2GB 12GB Corsair 1600mhz 
Hard DriveOSMonitorKeyboard
Samsung Spinpoint F3 1TB x3 Windows 7 64-bit Acer H243H 1920x1080 Logitech G15 
PowerCaseMouseMouse Pad
850W Corsair Antec 1200 Logitech G5 Alienware 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-920 @ 4.0ghz EVGA x58 SLI3 HD5970 2GB 12GB Corsair 1600mhz 
Hard DriveOSMonitorKeyboard
Samsung Spinpoint F3 1TB x3 Windows 7 64-bit Acer H243H 1920x1080 Logitech G15 
PowerCaseMouseMouse Pad
850W Corsair Antec 1200 Logitech G5 Alienware 
  hide details  
Reply
post #9 of 10
Well everyone on here seems to always bash my Novatech power supply... even though it has done me great, really quiet and solid. Mine had a two year warranty, but that's novatech. Yes you could test the power supply. There are kits out there to test them, until then try switching the GPU onto another rail. (i.e) connect it to different ports on your power supply assuming it is modular...
post #10 of 10
Only thing I could think is it's the PSU. I really don't know, so I could use some advice, but that's really the only thing left. Here are two screenshots:

g.gif
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