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Overclockers.com hebben ze een verhaaltje over de verschillen tussen thermal compounds neergezet.
Dit is nogal een technisch verhaal, maar de volgende delen zeggen genoeg:
So at 100 watts, using AS III between the heatsink and CPU core would increase CPU temps by 1.2 C
I repeat: The "ultimate" thermal grease will reduce CPU core temps by about 1 C. (Hier hebben ze het over puur zilver, theoretische situatie)
So, if you see anecdotal evidence, or a "test", of a thermal grease which gives something like 3 to 7 C better performance compared to the best that's out there now, I'd be REAL sceptical.
The upshot of all this is that thermal greases available today are about as good as it's going to get. Incremental improvements are likely, but considering just thermal grease alone, don't expect any quality grease to cost you more than 1-2 C at 100 watts radiated heat.
Considering other factors affecting the thermal resistance of the joint between the heatsink and CPU core, users will get more benefits in improved cooling performance by lapping heatsink bases, ensuring heatsink mounting pressures are to spec and re-greasing at regular intervals than searching for the "ultimate thermal grease".
Simpel gezegd: AS3 is de top, misschien kun je met het allerbeste spul op aarde nog 1 graad lager komen. Meer niet.