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Butcher · 03-19-2004, 11:32 AM

Those are to run the thing - your final cpu temp would be roughly Tcold. You'll need at least a 0.08C/W system just to get below ambient.

Recalculating for a C/W of 0.15 you'd be at:
Thot = 85.15C
Tcold = 47.8C

Comparatively, a straight water system of 0.15C/W would give:
Tcpu = 25 + 100*0.15 = 40C

TECs are really only worth it with a decent cooling system. Just to note, TECs are only rated to Thot = 85C in general, so if your system can't manage 0.15C/w don't bother.

Something to note however is that C/W is not constant for a varying load - my water system has much better C/W with a high load than low. I assume it's because convection through the radiator works better with a higher heat delta.

03-19-2004, 11:32 AM	#12
Butcher Thermophile Join Date: May 2001 Location: UK Posts: 1,064	Those are to run the thing - your final cpu temp would be roughly Tcold. You'll need at least a 0.08C/W system just to get below ambient. Recalculating for a C/W of 0.15 you'd be at: Thot = 85.15C Tcold = 47.8C Comparatively, a straight water system of 0.15C/W would give: Tcpu = 25 + 100*0.15 = 40C TECs are really only worth it with a decent cooling system. Just to note, TECs are only rated to Thot = 85C in general, so if your system can't manage 0.15C/w don't bother. Something to note however is that C/W is not constant for a varying load - my water system has much better C/W with a high load than low. I assume it's because convection through the radiator works better with a higher heat delta. __________________ Once upon a time, in a land far far away...