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HD 6990 GPU Temperature benchmarks

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pcm81

Senior member
Hello all.
Just a quick heads up that the GPU temp reported by GPU-Z during 3DMv11 is not as hot as the card actually runs at its peak... I use BOINC client to donate clock cycles and I usually leave it running overnight. My 6990s in CF usually run up to 109*C. This is the hottest temp that is reported by GPU-z. When I run 3DMv11 on Xtreme setting also on 4 GPUs, in CF mode, the highest temp that GPU-z reports is 100C. I got 5036X 3DMv11 score on the run which gpu-z reported 100C as highest temp for gpus...

I have no reason not to trust gpu-z version 0.5.2 but it looks like 3dm11 does not heat up the card as much as massivly parallel computing models like MW@home or Collatz@home do.
 
pcm81 said:
Hello all.
Just a quick heads up that the GPU temp reported by GPU-Z during 3DMv11 is not as hot as the card actually runs at its peak... I use BOINC client to donate clock cycles and I usually leave it running overnight. My 6990s in CF usually run up to 109*C. This is the hottest temp that is reported by GPU-z. When I run 3DMv11 on Xtreme setting also on 4 GPUs, in CF mode, the highest temp that GPU-z reports is 100C. I got 5036X 3DMv11 score on the run which gpu-z reported 100C as highest temp for gpus...

I have no reason not to trust gpu-z version 0.5.2 but it looks like 3dm11 does not heat up the card as much as massivly parallel computing models like MW@home or Collatz@home do.
Click to expand...

Get your water blocks installed, mate. The stock cooler just doesn't cut it for that type of use.
 
3DVagabond said:
Get your water blocks installed, mate. The stock cooler just doesn't cut it for that type of use.
Click to expand...

They shipped out today... i have ups tracking #...

EDIT:
The 110C from BOINC is with stock clocks of 830 MHz. In 3dm usually only 1st core is at 100% load/clock and rest are going slower, so card automatically undervolts them, in BOINC all cores run separate tasks so they all at 100% load and therefore 100% of stock voltage.
 
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Keep it looping for a few days, see if it explodes. 😀

I'm betting NO. There's a reason why those cards are so huge and crammed full of the best components.

ps. Nice setup.
 
Silverforce11 said:
Keep it looping for a few days, see if it explodes. 😀

I'm betting NO. There's a reason why those cards are so huge and crammed full of the best components.

ps. Nice setup.
Click to expand...

This is why I did not OC it yet, but it runs fine at 110C for over 24HR...
 
OCGuy said:
110c? Holy smokes...that is going to lower the life of those cards. Water, ASAP!
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I know, I know... not running BOINC any more, until i get my coolers. Bottom line is:

To test your HOTTEST performance, use BOINC not 3DMv11...
The reason is this:
In BOINC each GPU is working on his own task and so is always at 100% load and 100% clock so all GPUs are also at 100% stock voltage. In 3DM your GPUs are working together and only your 1st GPU is at 100% load, ther rest are waiting for work synchronizations... In this cse only 1 GPU is at full voltage and clock so the net thermal capasity of the card is lower than its 100% thermal capacity.
 
I guess I just added a data point that HD6990 actually works at 110C... Not going to try to test how long its going to work for... but it works...
 
Shameless bump, because people need to know that during video rendering benchies their cards are not running at the peak temps that could be at cards full load...
 
Is that the GPUs or VRMs getting to those temps?

Also I don't think those dual GPU cards (both Nvidia or AMD) are suited to tasks which involve them running at full load for extended periods.
 
WelshBloke said:
Yeah I think the last figure (gpu 3) is for the VRM's.

Also GPUz doesn't report the actual voltages, it just reports what they should be.

I still hold that those class of cards aren't suitable for that sort of workload.
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The cards are at stock voltage, I did not flip the switch... waiting for water cooling first. BTW 104C and 102C for 2 other temps is still pretty high.

I bet water will take care of it though. 6990s are pushing the air limits and then some... but the power circuit seems to be ok... I do not see any failures at the 110C either. Seems like a very robust design.
 
pcm81 said:
The cards are at stock voltage, I did not flip the switch... waiting for water cooling first. BTW 104C and 102C for 2 other temps is still pretty high.

I bet water will take care of it though. 6990s are pushing the air limits and then some... but the power circuit seems to be ok... I do not see any failures at the 110C either. Seems like a very robust design.
Click to expand...

Yeah if you aren't forcing different voltages then GPUz should show the correct values.

The 6990's do seem to be built to take the punishment. I think VRM's commonly run hotter than GPUs, I seem to remember them being the limiting factor in overclocking some earlier AMD cards.

Anyway good luck and enjoy those cards.
 
WelshBloke said:
Yeah if you aren't forcing different voltages then GPUz should show the correct values.

The 6990's do seem to be built to take the punishment. I think VRM's commonly run hotter than GPUs, I seem to remember them being the limiting factor in overclocking some earlier AMD cards.

Anyway good luck and enjoy those cards.
Click to expand...

Water coolers should be here on Wed, so next weekend i should have them on water and will report those temps...
 
WelshBloke said:
...and post pics :colbert:
Click to expand...
By the way, I am running at 85 idle, because the ambient in my room is 80... i like it warm...

So, the post important thing to take from this thread is:
1. Your GPUs might be hotter in some cases, then they are under game load... Graphix benchmarks do NOT use 100% of all GPU clock cycles.
2. 6990 GPUs do not melt, flicker or crap out at 110C, but i cant speak for life expectancy at those temps...
 
Does BIONC has a CUDA client setting?, I wonder if the NV 590 gets as hot (different components?)...110c cant be good for the card\s!
 
I can try it if you like.
Link me to what you're running and I'll see if I can use the CUDA client if there is one.
 
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