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BSOD/crashes with previously stable OC on 6950

post #1 of 6
Thread Starter 
For some time I've had no trouble using either of my Afterburner overclock profiles, one set to 850/1325@1.1v and the other to 898/1350@1.174v which I stress tested to confirm stability. I've done so again today with Unigine Valley Benchmark for an hour or so and it got my 6950 to

Thermal Diode 72c
DispIO 72c
MemIO 79c
Shader 77.5c

with the fans on my Arctic Accelero Xtreme III at 54%, all as reported by HwInfo64.

However, in at least two games, Assassin's Creed 3 and Far Cry 3, I've been getting BSOD when using the higher overclock and even the lower one but not at default clocks 800/1250@1.1v. However, last night FC3 did suddenly kick me to the desktop and although it still appeared in the taskbar I was unable to return to it and had to kill it with the Task Manager. That may have just been a bug in the game or the driver crashing I guess.

I saw this suggestion that it's only when the CPU and GPU are stressed together that the problems are triggered, due to the CPU voltage being borderline and spikes caused by the GPU power draw when overclocked. http://blog.szynalski.com/2012/11/25/the-right-way-to-stress-test-an-overclocked-pc/

It seems an interesting theory and would explain why I have no problem running prime95 and Kombuster or Unigine Valley separately but still get BSOD when playing certain games.

I currently have my X4 955 running at 3.6ghz (x18 multi) @1.35v, with the NB at 2400Mhz @1.3v. I use Phenom MSRTweaker to overclock the CPU and maintain the NB @1.3v for all four p-states, whilst dropping the CPU multi and voltage down each step. However, when gaming I put it into High Performance mode, which locks it at 3.6ghz. It has a Thermalright TRUE rev.c and Arctic fan which keeps it under 60c when stressed with Prime95.

I have 4 sticks of 4GB Corsair LP DDR3 running at 1333Mhz (one of them becomes invisible to Windows if I try to run them at 1600Mhz). My PSU is the Antec CP850.
Gaming
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i5-4670k Asus Z97-A Powercolour HD6950 2GB 16GB Corsair Vengeance DDR3 1600Mhz LP 
Hard DriveCoolingOSMonitor
Samsung F4 2TB Scythe Kotetsu Windows8.1 x64 Dell U2412M & P2314T 
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MS X4 Sidewinder eVGA SuperNova G2 750W Coolermaster HAF XB A4Tech 
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Gaming
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CPUMotherboardGraphicsRAM
i5-4670k Asus Z97-A Powercolour HD6950 2GB 16GB Corsair Vengeance DDR3 1600Mhz LP 
Hard DriveCoolingOSMonitor
Samsung F4 2TB Scythe Kotetsu Windows8.1 x64 Dell U2412M & P2314T 
KeyboardPowerCaseMouse
MS X4 Sidewinder eVGA SuperNova G2 750W Coolermaster HAF XB A4Tech 
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Onboard Realtek 
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post #2 of 6
i have had a similar problem but i blame the game deves as i think it is the poor software support for the hardware. for example sim city gets me blue screen when i run crysis and skyrim prefect. jealoussmiley.gif
Dark_Light_PC
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i5 3570k msi mpower z77 msi hd r7950 1.2 GHz 8 gb Gskill 1600 ram 
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64 gb v100 kingston ssd h100 corsair windows 7  3 sa300 sync master 21.5 Samsung Led Lcd 
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i5 3570k msi mpower z77 msi hd r7950 1.2 GHz 8 gb Gskill 1600 ram 
Hard DriveCoolingOSMonitor
64 gb v100 kingston ssd h100 corsair windows 7  3 sa300 sync master 21.5 Samsung Led Lcd 
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logitech g510 850w NZXT 80 bronze coolermaster 942 (HAF X) Rat 7 
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post #3 of 6
Iam with u guys on this similar problems with certin games as well! Today it seems like amd did an update for chipset 970 and crossfire because iam no longer getting bsod!
     
CPUMotherboardGraphicsGraphics
amd fx 6100 asus m5a97 msi radeon 6970 Msi radeon 6970  
RAMHard DriveOptical DriveCooling
corsair vengence BLUE  baracuda seagate 7200 rpm asus sata 24x drw thermaltake contac 30 cpu cooler 
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windows 7 home premium 64 bit LG 26 inch led 1900x1080 resolution logitech mk 260 coolermaster 750 watt gx bronze 
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coolermaster 430 elite logitech mk 260 logitech mk 260 sony reciver hooked up to asus optical port 
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2 blue cathode lights and 4 coolmax blue led f... Modright sleeved blue molex to sata x 4  
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CPUMotherboardGraphicsGraphics
amd fx 6100 asus m5a97 msi radeon 6970 Msi radeon 6970  
RAMHard DriveOptical DriveCooling
corsair vengence BLUE  baracuda seagate 7200 rpm asus sata 24x drw thermaltake contac 30 cpu cooler 
OSMonitorKeyboardPower
windows 7 home premium 64 bit LG 26 inch led 1900x1080 resolution logitech mk 260 coolermaster 750 watt gx bronze 
CaseMouseMouse PadAudio
coolermaster 430 elite logitech mk 260 logitech mk 260 sony reciver hooked up to asus optical port 
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2 blue cathode lights and 4 coolmax blue led f... Modright sleeved blue molex to sata x 4  
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post #4 of 6
Thread Starter 
Hmm, sounds like the issue might be with the driver rather than the games if an AMD update has fixed it for you. I'm not sure that the game should need to support hardware, other than to pass on instructions to the driver.

Anyway, I'm going to try running the CPU a bit slower at 3.5Ghz and see whether that eliminates any problems with the GPU both at default and overclocked.
Gaming
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CPUMotherboardGraphicsRAM
i5-4670k Asus Z97-A Powercolour HD6950 2GB 16GB Corsair Vengeance DDR3 1600Mhz LP 
Hard DriveCoolingOSMonitor
Samsung F4 2TB Scythe Kotetsu Windows8.1 x64 Dell U2412M & P2314T 
KeyboardPowerCaseMouse
MS X4 Sidewinder eVGA SuperNova G2 750W Coolermaster HAF XB A4Tech 
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Onboard Realtek 
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Gaming
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CPUMotherboardGraphicsRAM
i5-4670k Asus Z97-A Powercolour HD6950 2GB 16GB Corsair Vengeance DDR3 1600Mhz LP 
Hard DriveCoolingOSMonitor
Samsung F4 2TB Scythe Kotetsu Windows8.1 x64 Dell U2412M & P2314T 
KeyboardPowerCaseMouse
MS X4 Sidewinder eVGA SuperNova G2 750W Coolermaster HAF XB A4Tech 
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post #5 of 6
Thread Starter 
By the way, does anyone know a good combo of CPU/GPU programs to run simultaneously to test AMD systems? The blog I linked to recommends Intel BurnTest and FurMark for Intel systems and suggests some settings for IBT to leave enough CPU cycles free for FurMark to fully load the card, so I guess it's just a matter of which CPU program and settings to use to achieve the same on AMD.

Considering that all my crashes have been when running DX11 games so far, it seems sensible to use that when testing if possible, which Unigine Valley does.
Gaming
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5-4670k Asus Z97-A Powercolour HD6950 2GB 16GB Corsair Vengeance DDR3 1600Mhz LP 
Hard DriveCoolingOSMonitor
Samsung F4 2TB Scythe Kotetsu Windows8.1 x64 Dell U2412M & P2314T 
KeyboardPowerCaseMouse
MS X4 Sidewinder eVGA SuperNova G2 750W Coolermaster HAF XB A4Tech 
Audio
Onboard Realtek 
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Reply
Gaming
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5-4670k Asus Z97-A Powercolour HD6950 2GB 16GB Corsair Vengeance DDR3 1600Mhz LP 
Hard DriveCoolingOSMonitor
Samsung F4 2TB Scythe Kotetsu Windows8.1 x64 Dell U2412M & P2314T 
KeyboardPowerCaseMouse
MS X4 Sidewinder eVGA SuperNova G2 750W Coolermaster HAF XB A4Tech 
Audio
Onboard Realtek 
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post #6 of 6
Hmmm I believe 3dmark11 and heaven are benchmarks/stress test that are good for CPU/GPU
Dark_Light_PC
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CPUMotherboardGraphicsRAM
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Hard DriveCoolingOSMonitor
64 gb v100 kingston ssd h100 corsair windows 7  3 sa300 sync master 21.5 Samsung Led Lcd 
KeyboardPowerCaseMouse
logitech g510 850w NZXT 80 bronze coolermaster 942 (HAF X) Rat 7 
Mouse PadAudio
Razer Vespula Dell speakers + Razer head set + asus xonar dx ... 
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Dark_Light_PC
(15 items)
 
  
CPUMotherboardGraphicsRAM
i5 3570k msi mpower z77 msi hd r7950 1.2 GHz 8 gb Gskill 1600 ram 
Hard DriveCoolingOSMonitor
64 gb v100 kingston ssd h100 corsair windows 7  3 sa300 sync master 21.5 Samsung Led Lcd 
KeyboardPowerCaseMouse
logitech g510 850w NZXT 80 bronze coolermaster 942 (HAF X) Rat 7 
Mouse PadAudio
Razer Vespula Dell speakers + Razer head set + asus xonar dx ... 
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