I upgraded from an xp1800+ Palomino cpu to a xp2400+ and am having problems. No other changes with my machine and I flashed the latest BIOS (version 6B) for this motherboard (KX7-333r). All the basic stuff, internet, email, works ok. New Thermalright sk7 heatsink with Delta 60mm (Im kinda deaf so noise no prob) keeps cpu at 40c. But if I start Dungeon Siege it locks up within 30 seconds. The 1800cpu scored 1757 on 3dMark03, the test wont begin with the 2400. Norton virus scan locked up. As with the 1800, I have nVidia GeF4 Ti 4200 128mb pushed to 305core/550mem, haven't changed that. Running Win2k on Antec PSU 350. Please help!