I got similar problems (brought a new PC on Dec 2004)--
- P4 3GHz LGA775, intel i915GAG, 1 pc CDWR, no AGP card added yet, 1G DDR400, 80G HDD. ATX vertical metal chassis,
- 1 fan blow-in directly onto CPU HTSK from left-hand-side of the chassis, CPU cooling fan blow-in towards the CPU, 1 fan blow-out from back located right under the PC power supply (the power supply also has fans sucking air out as well)
- Heard from intel's web that P4 530 CPU Tc ~68C (zone 1 and 2 ~ 38C)
- room ambient ~ 17-22 C
- motherbroad Zone 1&2 ~ 38-49 C
- CPU temp (diode) ~ 47-51 C at low loading
- CPU temp (diode) ~ 55-64 C at high loading
(for example, Virus-scan + outlook or seeing PDF large pages on websites)
- CPU Fan read ~2220 rpm
- improved wirings intel 2 minutes stress test CPU temp. 62C
- I would expected that the CPU will be running at around 6x-7xC in summer time when room ambient at around 30C!
I tried to study the CPU cooling fan mounting, and found:
- The (came-with-box) cooling fan is mounting on the broad vis four plastic pins snapped-in to the broad; the contact pressure from the HTSK to the CPU is not very high.
- suspected not efficiently making contact between the cooler HTSK and the CPU surface vis the thermal pad.
- Unforntunately, don't know how to take the HTSK assembly out in order to apply some thermal compound !
(tried with the four HTSK pins untightened and with some pulling force but did not feel able to remove the HTSK)
- Should I disassemble the screws of the motherbroad in order to remove the HTSK from below? Anybody pls kindly advise!!!