Hi.. My system configuration is : AMD Athlon 64 3500+ ASUS A8V-MX Transcend DDR 400 Mhz 1GB x2 (Dual Channel Mode) Seagate ST3808110AS (SATA 2) 80 GB x2 Ati Radeon 9700 Pro 128 MB (AGP 8X) Zebronics LCB400ATX SMPS I have installled the latest drivers form Ati & Via on my OS -- Windows Vista Home Premium RTM (Latest Updates Installed) (In trial mode) (Performance rating 4.2). Whenever i run Ghost Recon Advanced Warfighter my system hangs....as a matter of fact the OS hangs whenever i try to run any games....GoD from airtel broadband is not working either (simple games like chessmaster).....My CPU fan makes a lot of noise.... I wanted to know if my motherboard or smps or some other components are faulty.....I checked the Ram using MemTest86 in Hiren's Boot CD it gave no errors. I also wanted to know if any system upgrade is required to run Vista (no professional gaming....once in a while "yes"). If upgrade is neccssary.....which is the best Processor Motherboard combo i can buy for Rs 10,000/-. I have a budget of Rs 2000 for a new SMPS....which should i buy....? Thanks a lot.