GPU not allowing PC to boot.

[SleepySEAL]

I recently bought a used R9 270 for a budget gaming rig but im having trouble after powering on.
The PC boots and displays video fine when booting with the integrated  graphics on the mobo, peripherals light up and i make it to the desktop.
once the gpu is connected the Fans On the pc cpu and gpu all spin but i get no video display, peripherals do not light up.
I Have tried the gpu on 3 different working rigs and it does the same on all of them.
I have also tried a different GPU on the affected rig and it also boots up fine.

is there anything else than can be done or is the GPU toast? thank you for the help

[PatrikYT_98]

try another pcie slot 

[SleepySEAL]

5 minutes ago, PatrikYT_98 said:

try another pcie slot 

my motherboard only has one pcie slot, but i have tried a different gpu on the same rig and had it work perfectly fine with no problems 

[Haro]

28 minutes ago, SleepySEAL said:

my motherboard only has one pcie slot, but i have tried a different gpu on the same rig and had it work perfectly fine with no problems 

Try updating the firmware on your GPU

[SleepySEAL]

22 minutes ago, TofuHaroto said:

Try updating the firmware on your GPU

how would i go about update the firmware without being able to boot?

[Haro]

2 minutes ago, SleepySEAL said:

how would i go about update the firmware without being able to boot?

Try if possible booting into safe mode if that doesn't work 

Use your i-gpu to display an image then download it and try to flash it