CPU FAN noise in MC but not flash

[cfedu]

Hello I just bought a used acer slimline x1800,
it has a q8300 @ 2.5 and NV 7100 integrated

I have it set up as a HTPC , During DVD playback in media center the fan revs up very loud every few minutes for a few minutes.

In task manager there in almost no load on the system.

I tested in it out running 3 1080P flash videos . I maxed the CPU to almost 80% for 20 minutes and the CPU fan never revved up. Stayed at 1250 RPM the entire time with CPU temps of 45 to 50.


So media center playback 2% load, low temps and the fan revs very high


flash playback 80% load slightly higher temps and fan does not rev


I tried speedfan and I can't control the speed

in the bios there is a smartfan control, when I disabled it it ran the fan @ 100% with noise like a jet engine

 

[zagood]

Sure it's your CPU fan? In your flash tests you give the RPM, but you don't give the RPM for DVD playback.

Check to make sure it's not your DVD-RW making that sound. Also check GPU.