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HD 7950 slow after resuming from sleep Win8 X64

post #1 of 4
Thread Starter 
Just assembled this PC:

MoBo: Asus P8Z77-V
VGA: Club3D HD 9750 Royal King
Win8 X64

Everything works great, including overclocking with the standard CCC utility. I set the card to all its max. values 1200 core & 1575 mem speed. Also set the energy slider to +20, otherwise the card would not raise it's clock to the max. under stress. When running FurMark 1.10.4 the card reaches about 55 fps continuously.

However, when i put the PC in sleep state and wake it again, the HD 7950 performs not that good. Instead of 55 fps, it reaches about 29 fps only. What I can see with the GPU utility in FurMark, is that the core clock maxes @ 880 Mhz.

Now to reset this behaviour I can do two things:

Reboot the PC or

In CCC slide the power slider a bit to the left and save, then to +20 and save again.

When doing so, everything works OK again, approx. 55 fps with FurMark again @ 1200 core clock.

I tested this with the 13.1 and latest 13.2b drivers, same behaviour. Is there anyone who also experiences this, maybe even someone knowing of a workaround? Already tried MSI afterburner without success. I would like to use the sleep state, because i can have my PC "switched off" automatically and wake it with the remote and WOL. Is this a driver issue?

Any help would be greatly appreciated!

Andre

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post #2 of 4
likely some driver issue for windows 8.
windows 8 does sleep more effectively and might mess up the wake up.
Thyslexia
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Thyslexia
(16 items)
 
  
CPUMotherboardGraphicsRAM
Ryzen 1600 ga B350 gaming 3 Nitro sapphire 390 16gb corsair lpx 2933mhz 
Hard DriveOptical DriveCoolingOS
samsung 850 pro  sony water w10 64bit Pro 
MonitorKeyboardPowerCase
acer xg270hu 1440p 144hz! steelseries 6gv2 Corsair 750w Cm 840 
MouseMouse PadAudioAudio
corsair deathadder (G400 cable went bad) sennheiser HD 600 asus essence stx 
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post #3 of 4
I would think its getting stuck in 2d clocks, but could be wrong..

I remember having a similar issue with Win7 and I think it was related to that.
post #4 of 4
Thread Starter 
Found this story:

http://myxp.anandkumar.me/2012/03/amd-uvd-and-mysterious-underclocking.html

Since this is almost a year old, I think correct resuming from sleep is a minor issue for the AMD driver devs...... With the aid of this article and a task scheduler job that runs when resuming from sleep, a workaround is possible. For now, I shut down the computer completely after use. Applied a registry mod that allows the PC to shut down when pressing the power button of the MCE remote controller.

Thanks Flopper and Derpinheimer for your response! smile.gif
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