The first I would do is pull out the XFX GEFORCE 6800 PCI-E 128MB DUAL DVI card, and throw in a old PCI card in to your PCI slot and see is it power up if it does it could be powersupply or video card is bad. If it doesn't you motherboard is Bad. (FROM THE SOULD OF IT YOU FRY THE MOTHERBOARD WHICH WHY YOUR LIGHT COME ON BUT NO FAN NOT A GOOD SIGN, SEEN THIS A FEW TIME CARD PROABLY WASN'T IN ALL THE WAY OR USE A 350 W POWERSUPPLY INSTEAD OF A TRUE POWER 480W OR HIGHER COULD HAVE DONE IT. YOUR COMPUTER TRY PULLING MORE POWER THEN IT COULD CAUSE THE VOLTAGE TO DROP AND THE AMPAGE TO JUMP WHICH WOULD CAUSE DAMAGE TO THE MOTHERBOARD.

1. Athlon 64 3500 89W
2.XFX GEFORCE 6800 PCI-E 128MB DUAL DVI between 77.5 Watts, and 123.5 Watts
3.A8N-SLI Deluxe Motherboard 75W
4.Seagate Barracuda ST3200822AS 200Gb
Power Management (watts)
Seek: 13.5
Read/Write: 13
Idle: 9
Standby: 2
5. DVD drive 12.5 w each
6.Corsair (TWINX1024-3200C2PT) 1024MB 10w
Total is between 302-336
Remeber a 350w not true power can only put out 275w or less. So I say go with a 480w Antec true power or higher.

But if i plug in my 350W PSU the motherboard is still booting up but with no display, but when i plug in my 500W PSU my motherboard doesnt boot up at all, the 350W PSU boots up but without a display.

Look at the side of the 500w power supply read the ampage on each rail and post them 12v 5v 3.3v rail then you will have something that say 12+vdc 26A 5vdc 38A and etc. anything lower then the number on this post is bad, even thought it say 500w it no true 500w it might only be 285w and 500w peak. which is why the 350w might boot the system but no display but the 500w doesn't at all. if you didn't spend over $70 or higher on a power supply it no good spend the $159 on the antec 550w true power or the neo it true 550w not peak it, and also come with overload and inrush current protection and the 12v 5v 3.3v are complely different circuits. If this boot up system and no video I would reset the cmos if still doesn't work return videocard, but still keep the powersupply cheap powersupply burn up systems won't take a chance.

A bit unsure about what you have just said, i will read out the amps that i get on the power supply:

500w PSU

+3.3V - 30A
+5V - 40A
+12V - 20A
-5V - 0.5A
-12V - 1A
+5G sb - 2A
+3.3V & +5V MAX - 260W

So im a bit unsure about what your trying to say, i think im going to send back the motherboard as ive never got it to work, or should i buy a better PSU????


Sorry for being a dumbass

Send back the Motherboard it proably bad, a better powersupply with 24pin atx ver2 will do since the 20A on the 12v rail is a bit low, get something with at less 26A or higher the 6800 nividia cards are know for draining a lot of power.

cheers for the help, already sent it back before your last reply