First of all, please disregard my PM: I didn't know that you had started a thread on this.
RE: Noisy fan - Now that I read this thread, it sounds like you installed the new CPU without applying any new thermal paste, but rather, re-used the old paste that was stuck on the heatsink. If that is the case, it is amazing that your system even managed to boot up, let alone fry your new CPU/motherboard.
Whenever you remove the CPU and/or heatsink, you should always clean all mating surfaces and apply new thermal compound.
Yes, that explains the noisy CPU fan when loading something as basic as a webpage.
Now, I did mention here: http://www.geekstogo...rd/page__st__15
My machine is now quite loud under full load, but that was to be expected, as it runs at 69C under 100% CPU use. Idle temp is the same as before (and just as quiet), and this is fine with me.
So there you go, you can expect temperatures close to 70C under full load, but you don't want it any higher than that. From memory, the T-junction on this CPU is 70.6C, so anything over that will see your CPU get throttled by the BIOS to allow it a chance to cool down.
As for the heatsink, on this model HP, it seems to be a common heatsink across the entire CPU range all the way up to 3.8GHz, but since you seem to have gotten things under control, then I'd recommend you just leave it at that.
You can use HWiNFO to check your CPU temperatures. I would actually be interested to see what temperatures you get under full load as I may have to re-seat my heatsink using a different thermal compound - I just used some thermal compound from our development department at work, which is not really specific for high temperature CPU's, we only use it on some chip-based amplifier PCAs.
EDIT: BTW, you might be interested in this since your other threads about PSU capacities. I bought a power meter to measure some of our appliances' power consumption, and under full CPU load and high GPU load (GeForce Silent N210), my PSU seems to put out around 200W of power to run. It's a bit on the high side, but we don't run it at 100% CPU for hours on end anymore as we now do our video encoding on a couple of i5's in a fraction of the time.
Edited by DDMLK, 14 November 2012 - 10:46 AM.