Feel I need to get this off my chest, but not expecting any magic solutions.
Last week I put together my first home built PC - Antec case, ASUS NForce3 Mobo, A64 3000, 1 Gb Ram, ATI 9800 Pro, 160Gb SATA Maxtor, etc - and I was amazed how easy and quick it was - about 3 hours building (reading guides of the fly!).
Had to break off for a day and then loaded software - XP Pro loaded in under 25mins

. All working fine until I decided to try running a game to check out the 9800 Pro. Loaded the COD UO demo and complete garbage on the screen. Tried Rome TW demo and same problem plus card hung and recovered by VPU recovery.
Off to Rage3D forum and followed hints like changing AGP voltage, upgrade Mobo Bios, setting to 4x AGP - no differences.
This morning I try again. works OK for a couple of mins then locks up again. Beginning to smell a rat here! Tried unplugging non-essential devices in case PSU is wimpy - no change.
To cut the story short(ish) looking under the 9800 I noticed that the fan ain't running

. Tried various molexs in the case - no difference. Now assuming that the fan is duff and need to RMA.
To make matters worse Microdirect's returns line is shut at weekends so I can't get an RMA no and can't post it until Tuesday

(busy Monday) - so my nice new £700 PC is currently a big black paperweight.
Maybe I should've stuck with NVidia!