I have Athlon 1333 processor and 2x256Mb DDR266 memory. NO MATTER what memory timings are, computer becomes unstable if memory speed is over 136MHz. If I set 139MHz, I can't start Windows Me: it gives me blue screen with "Windows protection error" on it, and system "hangs". If I set 142Mhz and over, I can't start comuter at all. I have tried to set FSB down to 103Mhz instead of using it at the same speed with memory, but it still doesn't work! What is the problem? Is it because of memory itself? or memory controller? or is it something else?