Originally Posted by woody777
I've been having a lot of video issues (so far audio is unaffected) with my i5 HTPC lately... red flickering lines, digital noise that fills parts or all of the screen, display loses signal briefly.
I was 98% sure that it was a heat issue, so I downloaded and installed Speedfan. Under very little load, my system is running at 60c. That's way too hot, right?
No. I seem to recall that modern processors are rated for up to 80C.
I opened the computer and found that the pins on the heatsink weren't pushed in all the way -- so I assume the heatsink wasn't doing it's job, right? Also, the thermal paste (just the stuff that came already on the heatsink) was kind of nasty looking -- half of it was on the cpu and half was still on the heatsink.
If there was compound on both the CPU and the heatsink in a fairly thin layer that was split between both pieces, then this suggests a fair thermal connection between the two.
1) how do I remove old thermal paste from the heatsink and the cpu and how do I apply new thermal paste?
Many ways to do this. Contact cleaner, brake cleaner, carburetor cleaner, acetone, lacquer thinner or. squirt on some new heat sink compound and work it into the old stuff until its all softened.
Be careful! Some of the chemicals mentioned here will attack plastic.
2) are there any longterm negative effects from running my cpu too hot? I ran it sporadically for a few weeks before checking it today.
Back in the day, a misaligned heat sink could spell death for a CPU. Today's cpus have heavy heat sink plates of their own and thermal sensors and should be self-protecting.
Many will simply partially shut down and only run as fast as their heat sinks let them.