Won't turn on when GTX 480 attached

[Closed Note]

So while I was playing the open beta of FFXIV, my PC suddenly shutdown. As if someone pulled the power cable. (temps were ok)

When I tried to turn it back on, it wouldn't start .. The EVGA logo was still pulsing. As soon as I unplug the PCI-E power cables, it'd turn on .. But of course with a 'no display' error. I replaced the PSU with a Seasonic 750W gold PSU, just to make sure it wasn't the strider (not built for swiss houses/power circuits xD).

So I'm kind of cluesless here :( I don't have a secondary GPU or MB to try it out .. What do you guys think? What could cause this madness D:

Edit: CPU is at 4GHz stable with HT, and the 480 only has a mild OC to Superclocked Stats.

[KaptCrunch]

REMOVE psu power cord and try card in another PCIx slot

[Closed Note]

Originally Posted by KaptCrunch

REMOVE psu power cord and try card in another PCIx slot

Tried that already. Unfortunately, same issue :(

[Zero82z]

Do you have any other video cards to test with? It sounds like either a video or motherboard issue to me, but you can't narrow down the problem without swapping components.

[martin_metal_88]

Clear Cmos to kill your CPU OC, maybe your mobo can't stand the OC anymmore.

[Closed Note]

Cleared CMOS by removing the BIOS bat. Can't get past that 7F :( only have macs at home besides this rig. There's no way to test it out for me by swapping components. I have it on the fly right now, with one memory stick, still not powering up when the 480 is attached :(

[Zero82z]

Do you get 7F with or without the video card installed? According to the manual, this is what it means (not much use):

Check POST error and display them and ask for user intervention

[Closed Note]

Originally Posted by Zero82z

Do you get 7F with or without the video card installed? According to the manual, this is what it means (not much use):

Getting that error when the video card is installed, but without the power cables attached. When attached it wouldn't even power up at all .. Just the nice EVGA logo, which is pulsing

Btw. Thanks guys for your fast replies ;) I really appreciate them!

[rjbarker]

Even after a CMOS reset, going into BIOS and loading Defaults it won't Post? Are you able to get into BIOS? If you still cannot Post or get into BIOS contact Evga Support (be nice if you could at the very least try the PSU and GPU in another Rig or borrow the same from someone to try in your)......sounds like it maybe your Mobo....

[_dangtx_]

50 percent chance the 480 cooked in its own juices, the fity percent (yo?)other mobo gave up on life, without any swap its a bit difficult. powering the card and no boot? interesting.

who do you have close by with a gpu in pci-e form?


i said interesting because the card does need of course extra power. so connecting the cable and no boot probably means it is the messed up one. but still, the doubt is still there.