Is my GPU faulty or do I need a new PSU?

[Pcnoob3210-1]

So 2 years ago I bought a pretty cheap pre-built PC which had an AMD Apu so I wanted to upgrade it to a separate GPU and CPU as it was a pretty shit APU. I've installed the CPU and GPU onto the mobo but I get no display on my monitor and after about a minute the fans on my case stop working and the fans on the GPU don't work at all. The pre-built PC said that it had a 500W PSU which I thought was enough for my components. Also I had to get a display port - VGA adapter for my monitor.

Specs:
New CPU: AMD Athlon X4 845
New GPU: Gigabyte radeon Rx 460 2Gb GDDR5
MOBO: Gigabyte GA-F2A78M-DS2
PSU: ATX switching power supply model: atx-500b
Old APU: AMD A4-6320

 

[spat55]

Make sure you have plugged the display cable into the RX 460 and that in the BIOS settings you have the graphics set on either Auto or on PCI-E, best way to do that is take the card out go into BIOS with APU change the setting then plug the GPU back in putting the display cable into the RX 460. It is possible that the PSU is too weak as it might not even be capable of pushing 300w.

 

[Pcnoob3210-1]

Thanks I'm going to order a new power supply from evga which should work. Is there a chance that my GPU is damaged from the power supply?

 

[spat55]

Thanks I'm going to order a new power supply from evga which should work. Is there a chance that my GPU is damaged from the power supply?

Possibly, if the PSU went it could of killed everything but hopefully it is just not up to powering it and hasn't gone bad.

 

[Pcnoob3210-1]

Yeah the PSU still works so hopefully I'll be able to use my PC when the new PSU arrives. I made sure to get an EVGA one so I wouldn't face a similar problem

 

[Pcnoob3210-1]

Still doesn't seem to be working even with the new PSU, going to test the GPU in another PC tomorrow to see if it's the problem

 

[spat55]

Still doesn't seem to be working even with the new PSU, going to test the GPU in another PC tomorrow to see if it's the problem

It could be that the Motherboard doesn't support the RX 460 as it's new.

 

[Pcnoob3210-1]

Turns out although the cpu is FM2+ like the motherboard it isnt compatible :/
Thanks for helping guys