amd phenom ii x2 550be
asus m2n68-am se2
markvision pc-6400 2x2gb
hitachi deskstar 500gb @7200rpm
xfx gtx 260 core 216 gfx card
coolermaster extreme 600w
msi dvd burner
i have tested the memory sticks and both are good. i had a friend of mine test them on another mobo. i also borrowed one of his memory sticks and tested on my motherboard: 3 beeps; 1 long, 2 short.
i tried starting up with only the cpu+fan+heatsink, 1 memory stick and the psu connected 24- pin and the 4-pin connector. removed, disconnected everything else.
the result: 3 beeps; 1 long, 2 short.
i shorted the bios (both jumper method+battery pull method), the mobo power led is on indicating that there is a distribution of power but i still get the 3 beeps upon startup.
i also tested the psu power with a voltage meter, also seems in order.
with every part added i get those 3 beeps, with nothing to the basic components added, i get the same 3 beeps. so far, the 3 beeps indicate memory failure or video graphics failure. i kinda ruled out the gfx card because (1) i really dont want that to be the case and (2) with the bios reset, gfx card removed running onboard gfx, i still get the 3 beeps. psu is good and power distribution is good, yet still 3 beeps.
i narrowed it down to bad memory card slots. but how can i be sure of this? tried cleaning/wiping the slots inside and out, still nothing. do you think i missed something here?