CPU: Pentium 4 (630 SL7Z9)
MoBo: P965T-A
RAM: 3 GB Corsair DDR2 533
HD: Seagate 7200.7 160 GB (ST3160827AS)
GFX: ATI Radeon X1600 PRO (stock heat sink)
CPU Cooler: Stock Intel heat sink
Used Hardware Monitor to get temps, Prime95 and 3D Mark06 trial version for load testing.
Room temp between 20-21C
All recorded temps where taken after 2 hours operation for their prospective tests.
Manually set Intel heat sink to 100%
P4 Idle / Load Arctic Silver 5 (6+ months cure)
46 / 61 C
P4 Idle / Load IC Diamond (~6 hours cure)
43 / 58 C
A cool 3C drop in idle and load.
Forgot to Find a program that would manually set the X1600 fan speed, I was to excited to take it apart.

X1600 Idle / Load Stock Paste (3+ years cure)
54 / 73 C
X1600 Idle / Load IC Diamond (~6 hours cure)
52 / 71 C
~10% / ~20% Less Fan Speed
So a definite 2C cooler + a quieter fan for the X1600.