I have a Acer Aspire M5100, with a RS690M03 motherboard. There was a Athlon 64 x2 4800+ Brisbane in it, and I found myself a 5200+ Brisbane, but that newer one doesnt work. When I install it, the fan slowly gets faster, and the CPU temperature raises until the system turns itself off. I tried to find a BIOS update but couldn't find any, even on the Acer website. I have no idea what to do now, except to add a thousand fans in it, does anyone have an idea?