Hey, This is my first post with this site and I look forward to learning as much as I can and sharing my knowlegde with everyone else. The problem I am having well one of them anyway is PC freezing. Its at random times but only seems to be when playing games :-(. That for me is a big problem. I THINK the problem is that I am using a nvidia chipset and a ATI card but well see. SPECS: Asus A8N-SLI nForce4 SLI AMD Athlon 64 3700+ Sapphire Radeon X1600XT 256MB PCI-E Zalman CNPS9500 AM2 Heatsink (works great) seagate 320GB HDD sata2 Western Digital 250GB sata2 Western Digital 120GB sata OCZ 1GB (2x512MB) PC-3200 DDR400 Dual Channel OCZ PowerStream 520W SLI plus 6 fans to movve air around good quality fans Now I did try and fix it myself but had no luck. It is currently overclocked a bit and temp is at 38°C idle and maxed at 45°C with load. I have reverted back to stock settings in bois and still deos not help just makes my computer slow. I can not update bois because there is no new ones and I have the latest drivers. My voltage is sitting at 1.47 and is automatic determind by my bois. I have done bench marks with 3d mark 06 and it geos though fine and I can do burn in test on all my hardware fine. So why deos my games lock up when playing games and not when doing other things? and how to fix problem?