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Unread 03-15-2009, 09:54 PM   #2
billbartuska
Cooling Savant
 
Join Date: Jun 2005
Location: Skokie, Illinois
Posts: 322
Default Re: Mac G5 Heatsink Upgrade Question

Generally, a fast CPU temperature rise indicates a ineffective heat transfer between the CPU and it's heat sink.
Just a guess, but the new thermal compound may not be making complete contact between the CPU/Heat sink (thus the fast temp rise) but be more effective at transferring the heat (and thus able to maintain the same maximum temp with less contact area). I'd check the CPU and heat sink for flatness.
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