I’m a newcomer to this board so hello to all. A little background on my problem: I put together a new box and am having some problems playing 3d games especially Battlefield 2 with this computer. The new parts included: AMD Athlon 64 3700+ socket 754 OEM Soyo K8USA Dragon Ultra (ALi M1687/M1563 chipset) PNY GeForce 6600 256mb AGP 1 gig DDR 333 C-Media 6.1 Maxtor 250 gig EIDE, Seagate 300 gig EIDE HP DVD Writer, Light-ON DVD Writer Ultra 500 watt power supply Ultra Wizard case Added one fan in front, one in rear in push-pull configuration After a clean install of Windows XP Pro SP2 and other basic software I have been having a heck of a time achieving stabile performance. When I click to join a game in Battlefield 2 I see the opening graphics picture with high pitched beeping sounds then the computer restarts. Upon windows booting I get the recovery message and the usual driver causing the crash explanation. I am able to play some games, Doom 3, Call of Duty, but not others. I have tried everything that I can think of, upgrading and downgrading every driver I can find for all hardware and chipset. Tried to upgrade bios, but the system became unusable until I rolled it back from 8usa2aa5 to 8usa2aa3. When trying to do a DirectX 3D Benchmark in PC Wizard 2005 I get an error “pcwizard.dll has encountered a problem and needs to close.” I have checked the RAM with Memtest86+ 1.65, and it found no problems after 5 passes. I will let it run tonight while I sleep to see if that does anything. I tried everything else I could find in other related posts, so now I’m stuck. Any help would be greatly appreciated.