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Unread 03-15-2009, 09:54 PM   #2
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.
My new rig....
Intel SE440BX-3, PIII 550 (@ 680)
MX440 275/332 (@ 350/400) and 3DFX Voodo 5 5500 160/160 (@180/180)
Two Opticals and 120 gigs (w/28gigs in RAID0) on 4 Maxstors
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