The first task is to remove the case cover and use compressed air to blow dust from around the processor, heatsink, power supply, and all vents and fans.
Cycling on and off of such fans is fairly normal when such use occurs. But usually, they cycle off after the temps are brought back to the normal range. If the heat is remaining high, then steps need to be taken to remedy the situation.. How do you know it's overheating? What are the temps indicated?
The power supply might be having a tough time, especially with only 380 watts.. You might think about taking it up a notch to around 500 watts.
Hope this helps.
I have my PC hooked up to the TV for infrequent movie watching.
The other night I heard the fans blowing especially hard.
The power supply, CPU, and case fan are apparently turning off a few minutes after startup. They then cycle on for a few seconds, and off for a few minutes.
The video card fan, and the motherboard fan run constantly.
The fan settings in the BIOS look good - except for the temperature which steadily increases.
Windows XP pro
AMD Athlon 6200? 32 bit, + Thermaltake fan
Gigabyte GA-K8VT80 Pro motherboard
older (4-5 yrs) Geforce video card
Antec Sonata Case, Antec True380S power supply
Vantec Stealth fan in case
Thanks for your help,