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Unread 11-11-2003, 01:36 PM   #14
RedPhoenix
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Join Date: Jun 2003
Location: Florida
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Quote:
Originally posted by pHaestus
You will find that peltiers lose very little in performance by undervolting them slightly. The 226W at 12V should be right in its sweet spot. I think this would perform a good bit better than the 172 at 24V. I don't have very much experience with pelt cooling GPUs, but I would guess that they aren't locking up from coldness. More likely they are locking up from it being really hard to insulate them fully and from the entire card getting chilled by the peltier due to all the copper traces. If you turn off the peltier then it will act like an insulator and may cause overheating. You might well be able to run it at a much lower voltage though when not running games. Shouldn't be too hard to rig up a rheostat for it. You'll need something that can deal with 5-6A (80W/12V) though so a fan controller built on the LM317 or LM350 is not going to work.
Any possible way to rig my sunbeam rheobus into doing this? If not, I have a fan controller on my Aero 7, could I take the Postive Wire on the pelt and splice it in with this?

I think I will just go for the 24V meanwell, if I can still get it. If not then I will definetly go for the extra PSU.
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