sabertooth z77 no video output help!

[ProdigalGeniuz]

i've been having this problem with certain video card. 1st was r9 290x, then sapphire 7970 ghz ed. and now the asus gtx 780 oc dcii. but the mobo works fine with sapphire toxic 280x, radeon 7990 and my old 6870 black edition.

the lights are on. system is running, all fans are spinning..basically just no video output. i tried on both pcie no result!!i'm scratching my balls hard!!

my build:
asus sabertooth z77
intel i5 oc'ed
thermaltake toughpower 1350w
16gb g skill

is there any incompatibility issue with this mobo?

 

[Custom Builder]

Have you plugged the 8pin ATX power cable into the mobo that's what powers your back-ports and PCI slots.

Here's a picture of the mobo slot I'm talking about http://i.imgur.com/Bj9m1Np.jpg

Remember to select best answer to thank the person for their efforts in helping to aid your problem.

 

[Tradesman1]

Do you have the latest BIOS? Did you uninstall and remove all the AMD drivers prior to the install of the nVidia GPU? If not you will probably have problems

 

[ProdigalGeniuz]

i fixed it..its the damn..asus sabertooth mobo z77..it's incompatible with so many cards..im using my old pz68 v pro..and it's working fine.. grrrrr..
i switch mobo after i read in some thread that it doesnt accept some cards like sapphire 7970 ghz oc ed and other factory tweaked cards.. my mobo didnt work with 290x too and but works with 7990, 280x and old 6870 cards. i didnt even know that some mobos are not compatible with vid cards.

i did the bios update for my sabertooth..

 

[ProdigalGeniuz]

Have you plugged the 8pin ATX power cable into the mobo that's what powers your back-ports and PCI slots.

Here's a picture of the mobo slot I'm talking about http://i.imgur.com/Bj9m1Np.jpg

Remember to select best answer to thank the person for their efforts in helping to aid your problem.

lol.. nice one