Watercooled CPU + GPU - AMD Driver stops responding

weevil

weevil

weevil

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Joined
11 Mar 2010
Posts
13
Hiya,

I have a nice watercooled CPU and GPU setup that I made, hoping to crank my GPU to new heights (7950)

At the moment I'm only concerned with GPU clocking, my CPU clocks quite high. Now at the default clocks of 800Mhz (500 idle)/1250Mhz my GPU idles at about 39/40 degrees. the GPU is safe up to temperates of 75-80 degrees so I'm told. I can overclock this to up to 1100Mhz/1250Mhz with no lock ups or artifacts. When I start clocking it I automatically bump power up to +20%

The problem I have is the AMD driver keeps crashing and recovering. What would cause this? I know its going to be related to my clocking, but how can I combat this? I can get so much more from this card.

I'm currently using CCC to overclock, is there something else that I'm missing?
 
Personally I would use afterburner but that's personal preference.
If your getting the drive failed response it's because your card is crashing this will probably be because of either not enough voltage for the clock speed or the chip u have wont do that clock speed just because your water cooled doesn't mean you will be able to oc like a mad man it's a silicone lottery.

I have the same issue with my CPU my temps are very very good but I only get 4.5 MHz at 1.36v to go any higher clock wise I have to get above 1.4v even though temps are fine I think that's fairly excessive volts for that speed I could be wrong but...
Kinda a poor example but what I'm trying to say is you have probably hit your limit on the gpu every gpu/CPU is different, it's all about that sweet spot of volts and clock speed sadly it looks like u have run out of stable clock increases before volts and temp have become a issue.
 
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So i just need to pump a bit more voltage through the card to enable the higher clock speeds? Or to just stabalise the higher end of my current clock range. Righto. I'll see about getting afterburner, and report back :)
 
Is your card voltage unlocked?
Also when u download afterburner put the power slider to 20% it helps with power draw.
Max voltage with good temps 1.3v but for 24/7 I wouldn't run much more than 1.25v personally.

Yep do a little voltage bump and see if it becomes stable when volts don't help it means u have hit the limit of the chip and go up in increments of 25 regarding clock speed on the gpu.

On my 7950 I get 1150/1450 @1.25v my 24/7 clocks I can go upto 1240/1580 @ 1.3v as a rough guide as all cards are different.

Non of my Overclocked are restricted by temps it's either amount of volts or limit of chip my gpu never goes past 43c and my CPU never goes past 55c (under prime 95 stress test) in real application I never goes past 45c.
 
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Just loaded up afterburner - the voltage slider is greyed out, but I haven't rebooted yet so that might be why. Uploading 5gig atm and can't pause so will have to wait
 
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