Ok, but then as soon as I started up Prime95 it ran up to 80C, which shouldn't be happening...
" @DystopiaX: no on a stock heatsink that's a normal idle temp "
Posted right above you, it's an i5 2400. I also used realtemp and Speedfan and all the temps match up, so it's not an inaccurate reading.
" @DystopiaX: When I was building my own PC, I removed and reseated the heatsink at least three times after the paste was applied, so that won't cause it. Now not using enough or using too much, that can cause it. First off verify those temps are accurate. Run something like RealTemp and make sure those temps match up. Next, what processor do you have? My MBP runs at 90C under load which is in range, but that's a specially designed laptop CPU with a higher then average TJmax. If you can tell us what processor you're using, I can tell you just how far off you are. While 90C is high enough to be called abnormal, some processors are happy running at 75 or even 80C. If that all checks out, remove your heatsink and clean the paste off. A little bit of rubbing alcohol will take care of it. Reapply a bit, you don't need all that much. Less then the size of a pea will do. Some people spread it around beforehand, some people let the heatsink's pressure do it for them, so that's up to you. Make sure everything is reseated firmly when you reattach the heatsink itself. If your temps are STILL out of place, report back. "
" @DystopiaX: Didn't see your post, sorry. Those idles are fine, most likely SpeedFan isn't reporting the temps correctly. Try something like RealTemp just to make sure. If both Speccy and RealTemp agree, then you are set. Are you using the stock heatsink? "Using the stock heatsink, Speccy, realtemp, and speedfan agree, except Speedfan is reading idle CPU temp at 90C. All readings jump up to around 80-90C as soon as I start doing something CPU intensive such as prime95.
" @DystopiaX: and you are positive the heatsink is firmly intalled it doesnt wiggle or have give if you give it a sligh tug? "I'll open it up and check now.
" @DystopiaX: and you are positive the heatsink is firmly intalled it doesnt wiggle or have give if you give it a sligh tug? "I just opened it up, repushed down everything and yeah it was pretty secure. Ran prime95 and checked temps again, they're all running at 78C. As soon as I stop the test they're all reading that the temps are dropping back down to 45C, except for the weird SpeedFan CPU and AUX readings of 88 and 80C respectively.
Even with the stock heatsink every benchmark I've looked at doesn't have it running this hot...
" @DystopiaX: The stock HSF isn't...what's the word....good? 90C sounds outside of even its mediocre cooling abilities, but you may want to look into something else. $20 or $30 can get you a good HSF that runs cooler and quieter. "
" @DystopiaX: Prime95 is a painful program, designed only to stress cooling solutions and check the stability of overclocks. It produces a type of heat that you won't see in normal usage. Coupled with the stock heatsink, you have the worst of both worlds. What are your temps after playing a game for a hour? As long as your average usage is within spec, there isn't too much you should worry about. Now, if you idle at like 50C and hit 90C when playing a game, then you have cause for concern. For reference, my OC'd 2600k using a Noctua NH-D14 maxes at 55C; since that is a $80 cooler, you can expect temps that are 15 to 20C above that. Those motherboard temps are abnormal; mine is 25C lower. How many fans do you have in your case? What is the ambient temp in your house? "Yeah, it was the initial 90C temps that were freaking me out. NOw I only get around 75C while running Prime95, which seems acceptable to me. HAven't played any games yet, since I'm still installing some on my computer.
@DystopiaX: So I actually was just in pretty much the same situation when I swapped out my B3 motherboard for the defective one. I had an i5 2500k with stock HSF and when I turned on Prime 95, within SECONDS I was pushing 75-80C. I probably would have hit 90C if I hadn't killed the stress test immediately. I think I was idling at around 35C. So I actually posted a forum thread in the PC and Mac sections asking about a new heatsink, which I installed about an hour ago. A $30 investment (Coolermaster Hyper 212+) and my temps are stabilizing between 60-62C with Prime 95 flogging away at the processor. I came from a low power C2D where anything other than the stock cooler was overkill, so the heat of the new processor caught me off guard.
You can also use the manufacturer monitoring utility if you don't trust the readings you're getting. Worth a shot. Maybe the sensors just read strangely.