Question Gpu wont boot on my Motherboard but boots on others

[TorvsK]

My new Gpu is here and i am replacing my Old Gpu which is a radeon HD 6670 coupled with an i5 2500, it is an rx 470 and i have a 650 watt brand new PSU... But the Rx470 doesn't output a display, I checked everything and everything seems to be fine. I tried to Boot the computer without the graphics card and connected the display cord into the motherboard, and it boots. But if i connect it to my new card it doesnt. So I tried my luck with another computer which is an A6 on an FM2+ socket, same, PSU, monitor, Ssd, Hdd just a different motherboard and cpu, and it Boots? How? What is wrong with my main PC?

 

[Colif]

what motherboard do you have?
have you got the latest bios?

 

[Spectatroll]

what motherboard do you have?
have you got the latest bios?

Can BIOS really affect these even after i have my GPU with the current BIOS running just fine for a couple of months

 

[dotas1]

Can BIOS really affect these even after i have my GPU with the current BIOS running just fine for a couple of months

That answer went to OP who just got a new GPU. If you have an issue, open a new topic and describe it along with your full system specs.