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Did watercooling your gtx480 make it a better overclocker?? **Update**

post #1 of 9
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I have a EK water block on the way for my evga gtx480 and just wanted to know if the decreased heat made it a better overclocker even if you weren't temperature locked before. Right now I have mine at 850-1900 @1.100v but can't get through New Calico in Vantage at 870-1930 @1.138v even though temps are under 90'C. Pretty much will the card need less volts than before for the same overclock with the water block? Thanks

Edit **Update**

Well, here is my first update. I got my EK block and couldn't believe how awesome it looked. I got the normal copper/acetal version. The black top with the copper base looks really sweet. Block looks and feels of good quality. Installation of the block took a while but that is because I work slow. Directions are a little weird cause they tell you to screw through a chip!! Other than that, it was fine. My loop currently goes pump>BIX360>i7>swiftech MCR240>gtx480>pump/res. I only have three fans connected to my BIX360 and a fan just blowing through the 240 not mounted because it needs smaller screws. With this, my gtx480 temps plummeted. I went from about 85-90'C in Evga Overclock Scanner to 50'C.On air, I couldn't get 850-1900 to run without artifacts in the Scanner. Now, it's no problem. I seem to have answered my first original question. Yes, your gtx480 will become a better overclocker on water. It needs less voltage for the same overclock than it did on air. I am currently stress testing at 890-1942 with 1125 Volts. On air, I couldn't even complete a vantage run at 870-1900 at 1138 Volts. My goal was to be hit 900 core stable but I will for sure pass that. My Vantage scores just keep climbing. In the end, it was all worth it for me. My gtx480 runs way cooler and is a better overclocker. If you have the extra cash on hand and want to push your gtx480 to the limit, watercooling is the way to do it.
Edited by skatpex99 - 6/12/10 at 11:14pm
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post #2 of 9
you're always temp locked to an extent... your card would OC a lot better at the same voltage under dice or ln2. the question is will a 30c drop make it a better OCer? if it means you can put 1.3V through the card safely, probably so.

i'm contemplating putting my 470s under water as they clock very well with ideal air cooling, but i'm afraid of spending all the time and money without getting better results.
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post #3 of 9
Yes.
The core behaves mostly like a CPU so if you are already maxing voltage, that part won't be helped much. However, the core and shaders are linked 1:2 ratio, so you have to rise shaders too...

Shaders, more than core, rely on lower temps to be stable at higher frequencies. In this way, you very directly get an OC advantage.

Using OCCT to detect errors can show this quite clearly, in fact at 1087mV on my card I have essentially drawn a progressive line of max clocks at each temp (or should I say, max temp at each clock) before the shader starts making pixel errors (and as it rises starts making huge artifacts).
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post #4 of 9
Quote:
Originally Posted by skatpex99 View Post
I have a EK water block on the way for my evga gtx480 and just wanted to know if the decreased heat made it a better overclocker even if you weren't temperature locked before. Right now I have mine at 850-1900 @1.100v but can't get through New Calico in Vantage at 870-1930 @1.138v even though temps are under 90'C. Pretty much will the card need less volts than before for the same overclock with the water block? Thanks

I don't have a WC setup but my setup can get my card to 35C idle and under 70C load.

From my testing I can tell you this.

I can do 850/1000 @ 1.1v on stock cooler
Adding extra fans to the card I can do 875/1000 @ 1.125v
Addign extra fans and A/C cool air blowing on the side of the case I can do 900/1038 @ 1.138v

With the last setup the temps are very cool but I still need more voltage to keep things stable. It's not always heat and as long as your temps are alright you can try higher volatge for a more stable overclock. However increasing voltage pass 1.1v on the stock cooler on a GTX 480 can really add more heat so unless you want your fan @ 100% I don't recommend it for the extra performance you might get.
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post #5 of 9
Thread Starter 
Quote:
Originally Posted by saulin View Post
I don't have a WC setup but my setup can get my card to 35C idle and under 70C load.

From my testing I can tell you this.

I can do 850/1000 @ 1.1v on stock cooler
Adding extra fans to the card I can do 875/1000 @ 1.125v
Addign extra fans and A/C cool air blowing on the side of the case I can do 900/1038 @ 1.138v

With the last setup the temps are very cool but I still need more voltage to keep things stable. It's not always heat and as long as your temps are alright you can try higher volatge for a more stable overclock. However increasing voltage pass 1.1v on the stock cooler on a GTX 480 can really add more heat so unless you want your fan @ 100% I don't recommend it for the extra performance you might get.
Im hoping to break 900 core with my EK waterblock so it might be possible. Anyone else have any before/after water cooling overclock experiences?
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post #6 of 9
any update.... i would like to get a 480 but the heat would be unbearable.
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post #7 of 9
Thread Starter 
Update!! Read first post.
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post #8 of 9
I didn't have much time to fine OC, but on a quick 2nd attempt all my 3 480s with EK blocks run fine 900Mhz @1.1v (first was 850Mhz @1.075).
I guess I was lucky or the Asus has more good chips (my stock volts were 1.012, 1.025, 1.012).
    
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post #9 of 9
ya I put mine straight to water so I don't have a before o/c to give ya but now I'm running 850/2100. I can run 890 stable with max volts but I don't like to max it out.
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