- Apr 9, 2014
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So first of all, i'm new to this site so forgive me when i do mistakes. 
So i had a PC which worked fine with a gigabyte radeon HD 6850 and an amd FX-4170. Those are located on a gigabyte motherboard (GA-970A-UD3). My psu is a smart m650w by thermaltake (it's a 650W psu).
I just recently tried to replace the gpu with an asus gtx 780 dcu ii, but as I hooked it up to my tv with an hdmi cable i didn't get a video signal even though the fans on the gpu were spinning. So i tried it again with the old gpu and this time not even it's fans wre spinning... Yes, i made sure i plugged in all the connectors(one 6-pin for the hd 6850 and 6-pin+8-pin for the gtx 780)and the gpus sat firmly in their slots. I also tried it with another gpu from an cheaper/older pc which doesn't need an extra power supply connector and still no video. I also tried to connect the gpu with a dvi cable with no success. So at this point i can't access the bios of the pc because my motherboard doesn't have onboard graphics and the gpus won't give me a video signal.
I thought that there still might be conflicting drivers on the pc, so i disconnected the hard drives an tried booting it up. As far as i know this the pc should boot up and open the bios, correct? But i still got no video signal.
There's also another weird problem. Since this happened i cannot switch off the pc by holding the power button, but switching it on works just fine. Also the reset button doesn't work. I'm pretty sure that i wired the front panel correctly but i might double check that, even though i don't know how that could be related to the gpu.
I also want to mention that i rewired some stuff to make it more orderly while exchanging the gpu, but this was mainly front panel stuff. Did i maybe damage something in the whole gpu exchange process?
Please Help, i have no clue what it could be...
So i had a PC which worked fine with a gigabyte radeon HD 6850 and an amd FX-4170. Those are located on a gigabyte motherboard (GA-970A-UD3). My psu is a smart m650w by thermaltake (it's a 650W psu).
I just recently tried to replace the gpu with an asus gtx 780 dcu ii, but as I hooked it up to my tv with an hdmi cable i didn't get a video signal even though the fans on the gpu were spinning. So i tried it again with the old gpu and this time not even it's fans wre spinning... Yes, i made sure i plugged in all the connectors(one 6-pin for the hd 6850 and 6-pin+8-pin for the gtx 780)and the gpus sat firmly in their slots. I also tried it with another gpu from an cheaper/older pc which doesn't need an extra power supply connector and still no video. I also tried to connect the gpu with a dvi cable with no success. So at this point i can't access the bios of the pc because my motherboard doesn't have onboard graphics and the gpus won't give me a video signal.
I thought that there still might be conflicting drivers on the pc, so i disconnected the hard drives an tried booting it up. As far as i know this the pc should boot up and open the bios, correct? But i still got no video signal.
There's also another weird problem. Since this happened i cannot switch off the pc by holding the power button, but switching it on works just fine. Also the reset button doesn't work. I'm pretty sure that i wired the front panel correctly but i might double check that, even though i don't know how that could be related to the gpu.
I also want to mention that i rewired some stuff to make it more orderly while exchanging the gpu, but this was mainly front panel stuff. Did i maybe damage something in the whole gpu exchange process?
Please Help, i have no clue what it could be...
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