I'm having an issue with my upgrade to an XP3000+ 400Mhz FSB from an xp2500/333 on an Asus A7N8X: Windows loads fine, but any application I run seems to crash within two minutes (firefox, doom3, thunderbird). I've tried adjusting my memory speed (which when set to SPD defaults to 200mhz) down to 166 and it doesn't seem to help. I also upgraded to the latest bios, 1010B, to make sure that wasn't an issue. The PNY memory (Optima Desktop DDR400/PC3200) ran fine at 333, but I'm wondering if it's the culprit here even though the packaging insists it ONLY works on PC3200, 400mhz systems. Could the 350 watt power supply be the issue? Here's what in my system: AMD XP3000+ 400 Zalman CNPS70000A-Cu 2x512 PNY Optima DDR400 Asus A7N8X Rev2, Bios 1010B Gainward Geforce 5900 SB Audigy 2ZS 2x Seagate 200GB 3x Vantec SF8025L Case Fans Any ideas?