I have an old SOYO SY-KT333 mobo with Athlon XP 1800+ CPU. It works fine with a 266Mhz RAM. I'm trying to boot with kingston KVR333X64C25/1G, a 1G stick and it won't go beyong memory testing during bootup. Does anyone know why? I double checked manual, google and it says PC2700 memory is supported on this mobo. I don't hear any beeps or nothing. It just stays there after memory testing and it does find 1G RAM. I tried all 3 DIMMs and its same thing. I've changed DRAM clock to 166MHz for PC2700 memory as suggested by manual and it doesn't help.