I have 4 identical 1 GB memory modules and CPU Athlon 64x2 4200+ and everything work OK. Then I upgrade the CPU to the same type but 5000+ Now I can't boot. Not even go into BIOS. I get a continously beep from bios. If I remove one RAM-module I can boot OK. I have tried to remove different memories, but as soon as I have more than 3GB I can't boot. I have also tried with 2GB memory modules. I can boot with one module inserted. But as soon as I have 2 modules I can't boot. I have tried to install kb929777 but failed. It says it's not for my system. How can I boot my MB with 4GB memory together with my new 5000+ CPU ?? MB = Asus M2N-E SLI DDR2 = Vdata DDR2 800MHz I have everything set to AUTO in BIOS and I have the latest 1201 version.