ax 1200 do i need to rma

[billythekid2012]

Hi all .

I been having this problem for like 4 months now.

i have 2 evga gtx 480 in sli each card will work grate one at a time

at stock and at a verry good overclock.

but if i plug both cards in and hook up the 4 pci-e power cables

and try to enable sli this is what happins.

 

1 i will lose video singnal right off the bad

2 it will work but come times for a few day to a week

then there a loud hum from the psu and i will lose the video singnal.

 

i have trid like 5 sli bridges tested the card in all pci slots.

 

It seem to me that the psu is not putting out the full power for both cards.

 

Another thing is i had a saus p67 deluxe and it did the same thing so i thought it was the board now i have a evga p67 ftw and it doing the same thing,

 

i evga tex has been helping me trying to find out what it is and they thing it the psu.

 

and i have trid all the pci-e cables and in different ports on the psu.

and no my card are not over heating .

and this happens at full stock system.

thanks

[peanutz94]

What are your voltages like. BIOS readings are okay if thats all you have to go by, Multi-meter would be most accurate though.