Hey, Can someone please help me with this problem. Every time I use my computer for some intensive work like rendering a video my computer switches off automatically. However this doesn't happen normally. It only happens when i am converting a video from one format to other or rendering something. I have already installed 2 fans. Also got my processor fan cleaned up. I have a 1.5GB ram,Pentium 4 D865GBf board. Please help me sort this out. Thanks.