Hello, new posting here. Have a weird issue I cannot figure out at all.
I have a Intel DH77EB motherboard, Core i3-3220, 8GB ram, Windows 10.
Currently I have a Geforce Gt 610 graphics card, doesn't use any 6 pin connectors from the power supply, this card works just fine.
Trying to upgrade to a Radeon R9 270x, requires 2 6 pin power connectors, I have a 600w modular power supply. No issue hooking up the cables to it.
However when I try to boot with the 270x inserted into the pcie slot, the computer doesn't boot, the fans don't even attempt to spin at all, the power button does nothing. I reseated everything in the computer including going as far as to remove the motherboard and make sure all of the standoffs and such are placed correctly.
Still did nothing, removed the 270x and put my old GT 610 back in. Instantly starts right back up, no issues at all. Tried my friends spare graphics card, a GTX 560 Ti. Again, requires the 6 pin power connectors from the power supply. Same thing, power button does nothing, wont even attempt to boot.
I have tried switching power supplies to a different supply, my brothers 750w. Tried going through the different cards, again, same issue. Only the GT 610 which does not require the 6 pin connector works. The other 2 do not.
Any help would be appreciated!