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

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Pcnoob3210-1

Commendable
Dec 27, 2016
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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
 
Solution
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.
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spat55

spat55

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Jun 4, 2012
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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.
 
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Solution
spat55

spat55

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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.
 
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spat55

spat55

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