Martin wrote: > Per Jessen wrote: > [...] >> I've added a simple paper-funnel on top of the CPU fan. The air >> inside the cabinet gets quite hot from harddisks and the graphics >> card, but by funnelling air from the outside of the cabinet, I can >> reduce CPU temperature by 2-3 degrees. > > Good idea. Some PC cases have a plastic funnel for exactly that. >
Yeah, this one does too, but it wasn't sat right over the CPU. >> Now, to get to touch the heatsink I removed the funnel. This almost >> immediately made the fan spin up from 3300 to 4500 RPMs. It also >> made the temperature jump to 70C, which made me put the funnel back >> on right away. >> The heatsink is not really hot - certainly less hot than both the >> harddisks and the heatsink on the graphics card. > > Mmmm... Very hot CPU but cool heatsink, and still cool even with a > slow fan speed... That strongly suggests that you have a poor thermal > contact between the heatsink base and the CPU package... 60 deg C > should be too hot to touch. You should have only a few deg C > temperature difference between your heatsink and CPU package. True, very true. I hadn't thought of it that way. When I got the 2nd board from Gigabyte, I cleaned the CPU and the heatsink, then applied a very thin layer of thermal compound. Not some expensive compound, standard heatsink stuff. After all, it's only supposed to fill in where the heatsink doesn't quite match the CPU. And both surfaces are very smooth. > Can you try the trick to disable cpu2 and other other cores as an > experiment with your present setup? Yep, I'll try that with maxcpus. > Then see if things are improved if you reseat the heatsink? > That should be worthwhile if only to confirm the temperatures. I'll give it a go and use even less compound. /Per Jessen, Zürich _______________________________________________ Prime mailing list [email protected] http://hogranch.com/mailman/listinfo/prime
