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Hello Water Cooling - The New Leadtek WinFast PX8800 ULTRA - Page 4

post #31 of 39
When overclocking with LN2, what is preventing overclockers, from going higher? I know you can put as much voltage and overclock, as much as you want. But can't they reach 9-10GHz, if they can overclock, as much as they want?
post #32 of 39
Quote:
Originally Posted by cognoscenti View Post
How do the record holders have core of 983 etc....is that simply due to the ln2 they use?
Keep in mind that these guys receive free products, so they're willing to fry a card simply for 1 benchmark run. Running that high of voltage will cause electron migration regardless of temperature. To me, I only respect overclocks that are able to be maintained 24/7. Otherwise, it's nothing more than bragging rights on a scoreboard on its way to the garbage.
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post #33 of 39
Quote:
Originally Posted by cognoscenti View Post
How do the record holders have core of 983 etc....is that simply due to the ln2 they use?
I don't know a lot about how the 8800's clocks work, but I remember that everyone was hitting a limit around 660. In a news thread on this site there was an article about the shader clocks raising in steps to the core clock, and that was the problem.

The last step could be around 680, and after that you can go extremly high on the core clocks because the shaders are staying the same. Or it could be that it is just a severe problem with heat, and when running at -90C, it's not an issue.
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post #34 of 39
Can you have a multi head phase?
post #35 of 39
Quote:
Originally Posted by cognoscenti View Post
Can you have a multi head phase?
I think that one would need multiple compressors....
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post #36 of 39
Quote:
Originally Posted by cognoscenti View Post
Can you have a multi head phase?
Yes you can. Running phase on a quad core and G80's wouldn't keep subzero temperatures though.
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post #37 of 39
Quote:
Originally Posted by cognoscenti View Post
Can you have a multi head phase?
Not quite... what you want to do is do cascading phase. One phase unit cools another phase head which then cools your CPU/GPU. This would be a 2-stage cascading phase unit. You can add more if you want. Multi-head phase is not recommended since performance takes a huge hit.
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post #38 of 39
oh ok thank.
Thought it would be interesting to have it on the cpu and gpu's
post #39 of 39
Quote:
Originally Posted by bigvaL View Post
Yes you can. Running phase on a quad core and G80's wouldn't keep subzero temperatures though.
Hi, Bigval.

Is that with a single compressor?

I would like to know as I have a Prometia that I am in the process of re-vamping...I am a complete Phase Noob (I know 2 things: cold and condensation)

Thanks. These are good things to know.
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