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GTX 580 Overclocking, Cooling and artefacts.

post #1 of 18
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I've been overclocking my EVGA GTX580 and was getting some good results.
I've had it at Core 900 and Memory 2044 @1.125V. Temps have also seemed under-control with the fan at 65-70%.It was running great, was stable in furmarkm, EVGA stress tester, 3DMark11 and in Shogun2.

I started The Witcher 2, all bells and whistles on max and i've seen a couple of artefacts so have turned the clocks back down.

Basically does cooling have something to do with this? Because i'm thinking about putting my 580 on water and if this will help me get the higher clock stable it is another tick in that box. .

any tips would be greatly appreciated.

Cheers
Spud
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Harry MkV
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post #2 of 18
Depends on your temps
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post #3 of 18
Temps and VRM temps, VRM's failing is the silent unknown killer of cards with low power phases.
post #4 of 18
Usually artifacts are from unstable ram IIRC. Ram is very sensitive to temps.
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post #5 of 18
i don't know much about the game, but i know with BC2 even the slightest system instability will cause artifacting.

of course the card is EVGA
post #6 of 18
If you can find a full-cover water block, water cooling would probably help your card stabilize at a higher clock. But, if you don't have a reference card (not sure about eVGA personally), it probably wouldn't be worth it. You'll get cooler temps, yes, but generally, artifacts have a lot to do with your VRM temps.

For a slightly cheaper (perhaps slightly less effective) solution, I'd recommend something like this on your VRMs to dissipate the heat.
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post #7 of 18
5outh there's no way he'd be able to use those sinks with the reference cooler, the VRMs are right under the blower, not to mention the stock unisink would have to come off. Those wouldn't be a bad idea if he was going for a GPU only block or some form of aftermarket air cooler that didn't have good VRM cooling (because I do like those sinks, I recommend the 14mm of those all the time) but with his reference PCB he would be much better off with the full cover block instead.

To the OP watercooling will allow you to overclock higher but I wouldn't expect a huge gain in clocks alone out of it, the additional benefits would be things like quieter operation.
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post #8 of 18
Wouldn't go over 1.1v - your going to kill your card.

My default voltage is 1.0872v. I found out that default voltage can vary from GPU to GPU. I was always wondering why other people would get lower temps than me at stock core default voltage. I currently lowered mine to 1.0750v which brought down my temps by 1C and still run stable.

Over clocks were done on EVGA Precision Software and verified by GPU-Z specs you see below.

Here are some of my 580 SC clocks to help you. These clocks were obtained at default 1.0872v.

The GTX 580 SC is 3% gain higher than a GTX 580 vanilla at stock speeds.

39-40C idle @ stock 797Mhz core on SC which is a 3% gain over vanilla stock.

40-41C idle @ 838Mhz core on SC which is 8% gain over vanilla stock. 838 Core/1061 Memory/1676 Shader

41-42C idle @ 855Mhz core on SC which is 10% gain over vanilla stock. 855/1086/1710

42-43C idle @ 875Mhz core on SC which is 13% gain over vanilla stock. 875/1111/1750

43-44C idle @ 890Mhz core on SC which is 15% gain over vanilla stock. 890/1135/1780

To go higher stable I have to bump my GPU to 1.1000 voltage.

44-46C idle @912Mhz core on SC which is 17% gain over vanilla stock.

This was my limit on air cooled card and 1.1v. Anything higher is asking for it and not because it's bad VRM's but because you hit the wall. The GTX 580 has no VRM or BIOS issues. It's problem free. Clocking cards will vary card to card. Lottery luck on what you get and that goes for all cards.

Now when I OC, I bump up across the board for Core / Memory / Shader to be exactly the same percentage gain on each GPU-Z validation.

I got clocked to on my final score 3D Mark 11 'Performance level' score of 6902. On an i7 950 @ 3.8Ghz OC - GPU 1.1000 voltage @ 912Mhz core. 3D Mark 11 score of 6902.

When I game full throttle I hit 82C temps with fan at 95%.

Hope my clocks help.

PS. I keep my 875/1111/1750 13% over clock on lower voltage 1.0750v 24/7.
     
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post #9 of 18
I run my card at 900/1800 core/shader and 2080 mem at 1.1v. No issues at all. It's sad to hear that your card is getting artifacts, but having your voltage as high as it is may be prematurely ending the life of the card.
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post #10 of 18
Quote:
Originally Posted by Arizonian View Post
Wouldn't go over 1.1v - your going to kill your card.

snip

I would love to see two instances of a 580 dieing because of volts over 1.1v but less than 1.3v. You realize that you are saying any more than 13mV over your STOCK VID and he will kill his card? 13mV is not a whole lot at all, certainly not enough to make the difference between nvidia certified as safe voltage to ship a card out on, and "your going to kill your card". Are you confusing these for the 570 where what you said would be true, I wouldn't want to go above 1.1v on reference 570 VRMs, or do you really think a 13mV overvolt will kill his card?

That guy I really don't think that's a concern with only 1.125v, I wouldn't even worry about 1.15v on the stock cooler. Any more than that and you may be right but I presonally don't see the alarm in such minor overvolts. Nice GPU, CPU, Mobo, Case, RAM, and PSU by the way. LOL pretty similar
Edited by juano - 6/13/11 at 12:24am
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