I have this Gateway
http://www.amazon.com/Gateway-DX4860-UR28-Desktop-Black/dp/B00CJ9HVOI
and the other day I upgraded the PSU to a Corsair CS550M and installed a PNY GTX 750ti. With only the new PSU and no GPU, the system works perfectly. With the 750ti installed, the screen sits on the gateway splash screen for about 5 minutes then goes to a screen listing the Nvidia GTX 750ti, but hasn't left that screen. I have tried another PNY 750ti with the same result. A Radeon 7770 Ghz edition I had lying around works fine. There was no GPU in the PC before so there are no Nvida or AMD drivers installed as of now. Could the mobo just not be compatible or is there something I'm doing wrong?
http://www.amazon.com/Gateway-DX4860-UR28-Desktop-Black/dp/B00CJ9HVOI
and the other day I upgraded the PSU to a Corsair CS550M and installed a PNY GTX 750ti. With only the new PSU and no GPU, the system works perfectly. With the 750ti installed, the screen sits on the gateway splash screen for about 5 minutes then goes to a screen listing the Nvidia GTX 750ti, but hasn't left that screen. I have tried another PNY 750ti with the same result. A Radeon 7770 Ghz edition I had lying around works fine. There was no GPU in the PC before so there are no Nvida or AMD drivers installed as of now. Could the mobo just not be compatible or is there something I'm doing wrong?