I recently assembled an Athlon system using an AOPEN AK73 Motherboard. My Athlon is a 750K not overclocked. When putting the PC on standby (S3 mode) it goes to sleep fine but crashes when I try to wake it up(the mobo voice says your CPU may have a problem). It worked fine in S3 mode for a couple of days except that it would wake itself up late in the night. CPU temps are all normal. I changed the sleep mode back to S1 and it all works fine except that I hate the extra fan noise. Any insights?