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OCing my 9800GX2s

post #1 of 20
Thread Starter 
So I have 2x 9800GX2s in a folding rig, and one is folding for the team competition. I'm trying to jack up my clocks so I can catch Kamikaze, the only person standing between me and first place in Cat2... but one core on each card is unstable when I jump up to 1890 shaders. I would like to keep all four cores (both cards) stable, but I'm not sure if there's any way besides better cooling. (Box fan is what I have now...) Suggestions?
    
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post #2 of 20
remove the shroud off the cards that will drop the temps 5-10C as for stabilization i really don't know im pretty sure you cant control the voltage on these cards.
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post #3 of 20
yes the heat is a real pain, put some fans at the BACK of the card, that dropped my temps 10 degrees or so, remove the shrouds, clear all dust from the cards and you should get a decent overclock. I mean I still top 110 degrees lol. another option is of course water cooling and there are a few different blocks available for these cards but they are far from cheap. good luck
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post #4 of 20
Thread Starter 
I already removed the shrouds. Do you think fans at the back of the card would be a better option than just putting a box fan on top? I mean, seriously, the cards are running at mid 70s C at full load... shouldn't I be able to clock a bit higher?

EDIT: One is mid 60s, the other is mid 70s.
    
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post #5 of 20
Quote:
Originally Posted by Epona View Post
I already removed the shrouds. Do you think fans at the back of the card would be a better option than just putting a box fan on top? I mean, seriously, the cards are running at mid 70s C at full load... shouldn't I be able to clock a bit higher?

EDIT: One is mid 60s, the other is mid 70s.
no dont put any fans at the top of it, doing that creates some kind of turbulence and reduces the air flow in the card. when there's a fan at the back it feeds air into both sides of the card. would you like a pic?
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post #6 of 20
Thread Starter 
I just feel it won't change my temps much. I mean, 60/70 for a 9800GX2 @ 100% is phenomenal...

A question about OCing for folding, is it true I only want to bump the shaders and nothing else?
    
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post #7 of 20
Quote:
Originally Posted by Epona View Post
I just feel it won't change my temps much. I mean, 60/70 for a 9800GX2 @ 100% is phenomenal...

A question about OCing for folding, is it true I only want to bump the shaders and nothing else?
yeah changing the memory does nothing, just change the core slightly and the shaders as much as possible
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post #8 of 20
Here is how I cool my card:


If you can keep the PCB cool, the rest of the card will stay a lot cooler. For a while I was running 2 GX2s in one system and their temps never went above mid 60s (of course the rig was on the floor in my basement, so it had the coldest air in the house.) The fan did a great job of removing all hot air from around the cards.




What is your core speed and memory set at? (I'm one of those people who don't believe the people who say core and memory speed are not important for folding...)
Edited by k4m1k4z3 - 2/13/11 at 9:35am
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post #9 of 20
Quote:
Originally Posted by jy360 View Post
yeah changing the memory does nothing, just change the core slightly and the shaders as much as possible
Not true.
The memory can have some effect as well. The GPU must utilize SOME vram in order to fold.

Raise your memory a bit OP.
(50 MHz)
    
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post #10 of 20
Thread Starter 
I did raise it some. I originally had them linked and they worked the same way they do now that I just bumped up the shaders... ah crap, the computer crashed. >_<

Kamikaze, what are your clocks at?
    
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