That's pretty warm but about what to expect for the stock cooler. How long were you running Prime? How's your cases cooling? It's always a good idea to replace the stock cooler but the one you choose depends on your goal with the system, the faster you want it to be, the better (and usually more expensive) the cooler has to be. Also, what program did you use to determine the temps? I have found that almost every program I use gives me a different tempurature. Try Core Temp and see what you get, it seems to be fairly accurate.
Thanks. I've used Core Temp to measure the temps and only ran Prime for around 10 minutes. So it might even get hotter if I run it for longer. My case is an Antec lanboy with a 80mm fan at the front and back.
57/55C off the cores on load, is normal. Try running prime for at least 4 hours. If the temps get passed 75C, then I'd be concerned with airflow. If you are sure airflow is adequate, then perhaps 3rd party HSF will do better.
The way I see it, if you did have 57/55C at idle, then I would suspect that the HS isn't installed right.
cfvh600, depending upon ambient temperature and regardless of whether your E6300 is L2 or B2 Stepping, your Core temperatures, using Prime95 Small FFT's, are not "pretty warm", but are instead "Safe", as shown in the Core 2 Quad and Duo Temperature Guide - http://www.tomshardware.com/forum/221745-29-core-quad-t...
From Section 6 in the Guide:
Scale 5: Duo
E6x00: Tcase Max 61c, L2 Stepping, Tjunction Max 100c, Vcore Max 1.325, TDP 65w, Delta 15c
E6x00: Tcase Max 60c, B2 Stepping, Tjunction Max 85c, Vcore Max 1.3525, TDP 65w, Delta 15c
-Tcase/Tjunction- --60--/--75--75-- Hot --55--/--70--70-- Warm --50--/--65--65-- Safe --25--/--40--40-- Cool
When load tesing with Prime95, the CPU, socket, motherboard, and HSF will reach 100% heat saturation in 7 to 8 minutes, so test durations longer than 10 minutes will not yield higher temperatures, provided that ambient temperature remians constant.
The stock cooler is adequate up to 1.35 Vcore, which will typically yield an overclock of about 3.0Ghz, depending upon your individual CPU. If you intend to attempt a higher OC, then a better HSF will be required.
I agree that push pins have their disadvantages, however, if due care is taken during installation, the Arctic Cooling Freezer 7 Pro performs well enough to cool my Q6600 @ 3.6Ghz, and is far from being "a piece of crap". At a hieght of 126.5mm, it is an excellent choice for those who do not have a "wide body" case.