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[Official] GTX 580 Overclocking Club - Page 279

post #2781 of 3575
Edit: lol misclickaments.

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post #2782 of 3575
After talking with JacobF @ EVGA I was told that 80ºC-85ºC at full load is completely fine on these cards, specially on my 3-Way SLI.

Considering I am at 77-79ºC on the top two cards at stock, I have a small margin and I have done 850MHz @ 1075mV (Looks like the 3rd card I bought needs a bit more voltage, the other two only need 1063mV to be Crysis 2 stable).

I load at 80-84ºC now without vsync, and about 77-79ºC with vsync, something I noticed is this power supply is more than enough and I'm only pulling 910W from the wall which is ~782W from the power supply. biggrin.gif

Do you guys think it's safe if I keep them at 850MHz 1075mV (Max temp 84ºC) or should I keep them at stock?

It's not like I need more performance anyways, with the 3-Way SLI I can even play Metro 2033 at 2560x1440. biggrin.gif
     
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post #2783 of 3575
Quote:
Originally Posted by danielwiley View Post

Edit: lol misclickaments.
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Wow, I could not see that until I quoted it. Weird.

 

post #2784 of 3575
Quote:
Originally Posted by kcuestag View Post

After talking with JacobF @ EVGA I was told that 80ºC-85ºC at full load is completely fine on these cards, specially on my 3-Way SLI.

Considering I am at 77-79ºC on the top two cards at stock, I have a small margin and I have done 850MHz @ 1075mV (Looks like the 3rd card I bought needs a bit more voltage, the other two only need 1063mV to be Crysis 2 stable).

I load at 80-84ºC now without vsync, and about 77-79ºC with vsync, something I noticed is this power supply is more than enough and I'm only pulling 910W from the wall which is ~782W from the power supply. :D

Do you guys think it's safe if I keep them at 850MHz 1075mV (Max temp 84ºC) or should I keep them at stock?

It's not like I need more performance anyways, with the 3-Way SLI I can even play Metro 2033 at 2560x1440. :D


 

I have been folding 24/7 for over three months now at various clock speeds between 797 MHz and 934.5 MHz on the core at voltages between 1.063 and 1.150V. I've found that if I keep my temperatures at or below 80C that the card is most stable.

 

I've had absolutely no problem with the card at 1.150V and 80C max in full-power folding, which is more stressful than gaming.

 

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post #2785 of 3575
Quote:
Originally Posted by shad0wfax View Post



 
I have been folding 24/7 for over three months now at various clock speeds between 797 MHz and 934.5 MHz on the core at voltages between 1.063 and 1.150V. I've found that if I keep my temperatures at or below 80C that the card is most stable.

I've had absolutely no problem with the card at 1.150V and 80C max in full-power folding, which is more stressful than gaming.

Good to know, thanks. thumb.gif
     
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post #2786 of 3575

If anyone's curious about memory timings for the 580, I used some stock data points for both reference and overclocked factory settings and then extrapolated the curve out to higher clock speeds. I've tested it in benchmarks and it seems to do quite well. (Right click for new tab and larger view.)

 

memory curve.JPG

 

The 950 core / 1900 shader with 2138 memory is slightly less than ideal in terms of memory frequency, but the next increment up sets it considerably higher at 2155.

The 962 core / 1924 shader with 2155 memory is pushing the memory a bit higher than the curve should be, but again, it was the next increment after 2138.

 

I've pushed the memory at 962 core / 1924 shader all the way up to 2277 MHz and it did bench better there than at the 2155 which fits the curve. However, artifacts were much more prevalent at 2277 MHz on the memory, even though the score was higher.

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post #2787 of 3575
I have been playing at 850MHz 1075mV for about 2 hours on Battlefield 3 Multiplayer @ 2560x1440 capped at 64fps and the top card never got above 64fps, always a steady 64fps.

Quite happy, I'll keep this OC. biggrin.gif
     
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post #2788 of 3575
This is going to sound terrible but what exactly is folding? I understand the basics but what are the most important things about your pc for folding purposes?
post #2789 of 3575
Quote:
Originally Posted by Ryanhabs View Post

This is going to sound terrible but what exactly is folding? I understand the basics but what are the most important things about your pc for folding purposes?

The most important thing about a system when considering folding would be stability and adequate cooling. You can fold on just about anything but obviously more powerful hardware can fold faster and do more work/research. If you'd like to learn more about folding there is a "folding essentials thread" linked in my sig, and if you'd like to start folding then this post/guide of mine will get you set up to fold most effectively as possible. The only thing is as I mentioned you need to be fairly confident in the stability of any overclocks you have on your CPU and GPU before you start so you aren't failing too many work units. The CPU folding client is like running something that is 95% as stressful as prime95, and the GPU client is just about the most stressful thing you can run on a 500 series GPU.
Edited by juano - 2/26/12 at 6:45pm
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post #2790 of 3575
Quote:
Originally Posted by Ryanhabs View Post

This is going to sound terrible but what exactly is folding? I understand the basics but what are the most important things about your pc for folding purposes?


Also, be aware that folding on a dedicated basis with your GTX 580 will generate significant heat in the room that your PC is in as well. Watch your ambient temperatures carefully, as with some fan speed profiles your GPU temperature will out-run your cooling unless you shift fan profiles around.

 

It's been my experience that the GTX 580 likes to fold at 80C or less. Even though the cards are rated up to 95C or more, they often start producing errors above 80C if you're pushing the overclocks hard. I suspect that it is VRM related but I can't verify that with the equipment that I have at home.

 

I just recently did a modification to my case that improved airflow and was able to increase my 24/7 folding stable overclock to 937 MHz core / 1874 MHz shaders / 2138 MHz memory @ 1.150V and 76C (max) at 90% fan speed (max) on a reference hardware evga gtx 580 superclocked. Ambient temperature is 23C. Before I did modifications to the fan speed profile my maximum core clock was 900 MHz at 80-85C. After modifying the fan speed profile, my maximum core clock was 918 to 924.5 MHz at 80C. After the case modification, temperatures dropped by 12C at 100% fan speed and I started experimenting with more aggressive overclocks. I was not able to get a 950 MHz core stable even after the case mod.

 

One last thing to keep in mind is power costs. If you're interested in using folding to test long-term stability and get your GPU ultra-stable, then power costs aren't a concern. If you're going to get into folding on a 24/7 basis, I'd encourage you to read the thread that is linked in my signature and form an educated decision about CPU, GPU, or CPU & GPU combined folding.


Edited by shad0wfax - 2/27/12 at 10:32pm
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