It was "not funny" when the Microsoft KB article asked us to reduce the RAM to 2GB or less.
Maybe you have the right OS for 4GB, but I don't see such detail.
i just recently installed 4gb ddr3 ram in my computer and since then my pc goes into standby and immediately (within 2 seconds without fail) wakes up again. there is a small red led on the motherboard that just stays on. i have an am3 cpu in an am2+ socket.
other than that there isnt a single problem with the computer bios works fine, windows loads fine and it recognizances the ram.