Quick Voltage Question for CPU on Water.

Firegod

Firegod

Firegod

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Joined
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Newcastle, UK
Hey,

I'm currently at 2.75Ghz on CPU in Sig. This is being Watercooled by the Zalman Reserator2. My temps at idle hover around 30ºC. This is with ~1.6v.


Can I go any higher, say perhaps 1.7v to try and get 2.8-2.9Ghz? I have been running this speed for a good year or so now, even before I had Watercooling, and it's quite stable. :)

Thanks for any pointers.
 
I wouldn't go over 1.65v. No amount of cooling would make me perfectly comfortable going over 1.65v with.
 
Who cares about "idle" temperatures? The system needs to be able to coope with load temperatures! How hot does it get under full load if run for several hours? Can the Reserator keep up with the heat load? If it can, you might have some head room but otherwise you would need better cooling. Adding voltage does horrible things to the heat generation. I forget the equation but it's not linear. As you add voltage it does something to the square of the hypowhatsits or something so be very careful.

Assuming the cpu in the sig (some of us have sigs turned off for very obvious reasons!) is an A64, I've been to 1.72v on an Opty but that's with serious water-cooling and only for a suicide run.
 
Well with 1.65v she's at 2.8Ghz (A64 3800+ Venice - 2.2Ghz Stock). Just quickly ran Prime95 for half an hour and temps went from 30ºC idle to 46ºC load (fluctuating between 44-46ºC). This was with nTune and MBM logging the temperatures. MBM reported the voltage at just under 1.65v.

After reading what you guys have said I think that'll be the max for me for sure, especially if 1.72v was a suicide run. :eek:
 
A suicide run doesn't necessarily mean the chip will die but it means you're doing it for a very short time and it might die.

As for your temps, the reason why it needs to run for several hours at full load is that your water-cooling might keep the temps down for a while but the ability of the cooling to wash away the heat may be overwhelmed over a long period of heat generation.
 
MikeTimbers said:
A suicide run doesn't necessarily mean the chip will die but it means you're doing it for a very short time and it might die.

As for your temps, the reason why it needs to run for several hours at full load is that your water-cooling might keep the temps down for a while but the ability of the cooling to wash away the heat may be overwhelmed over a long period of heat generation.
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Thanks, I'll try running it for longer then. :) It's hard when I actually need to use the PC. I have no patience. :p
 
what are you measuring your temps with?

They look suspiciously low for a fully loaded passive w/c system. I've put 1.6+ through cpus on high end water/phase and still not been entirely happy with the temps, half of the time because they were unfeasibly low as recorded by dodgy mobo sensors.
 
Logic Zero said:
Hi, coudl someone PLEASE explain what folding@home is? I have no idea, people keep talking about it but im confused :confused:
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There's a section of the forum for it, near the bottom :)

Simply, it is a program which simulates proteins in the body, in order to find cures for nasty diseases :D The main thing we're interested in is points though :cool: Makes it surprisingly competitive.
 
matt100 said:
what are you measuring your temps with?

They look suspiciously low for a fully loaded passive w/c system. I've put 1.6+ through cpus on high end water/phase and still not been entirely happy with the temps, half of the time because they were unfeasibly low as recorded by dodgy mobo sensors.
Click to expand...

Hi there,

I've been using nTune and MBM. I have checked quickly in the BIOS which reports a few degree's higher, but they all report the same figure, give or take 2-3ºC.
 
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