Thank you very much. Here go 5 minidumps. Btw, the result using only the new 2x512 DDR (so discarding almost for sure the problem with faulty DDR's) is the same. Crashed. This time with no minidump. Sometimes, when the crash occurs during 3D gaming, the game simply freezes with a repeating sound and that's all. This was the latest case. As to temperatures, I think I have a cooled system (CPU 45-50ºC, Chassis 33-35ºC when in 3D), although the CPU is an Athlon XP 2100+ Palomino which was the fastest but also the hotest (and rarest ?) with the .18 core.