PC wont boot with new GPU

Adam92Bell · 18 Nov 2018 at 17:19

I have just bought a Sapphire Radeon RX Vega 64 Nitro+ as an upgrade and when i have put it in my system it will not boot. however, if i removed the power supplies to the GPU but leave it the PCIe port and turn my PC on, the LED's on the side of the card light up and the system will boot. however, as there is no power to the GPU other than the weak supply from the MOBO it does nothing. Any suggestions on what the issue could be? Many Thanks.

Adam92Bell · 18 Nov 2018 at 17:25

Asus X99-A/USB3.0
Intel i7-5820k
Corsair CX850M
Samsung 840 EVO 120gb SSD
Corsair H115i pro AIO Cooler

Adam92Bell · 18 Nov 2018 at 17:27

Nvidia GTX 970

Adam92Bell · 18 Nov 2018 at 18:04

Yeah that was one of my first attempts to make it work. I thought maybe the GPU was broken, but it cant really be as it will still draw power from the MOBO to light itself up when not connected to my PSU

Adam92Bell · 18 Nov 2018 at 19:13

freddie64 said:
Are you using both PCI-E cables or just the one daisy chained cable?

At first i was only using the daisy chain one and then i added the 2nd cable so that its running off 2 different ones

Adam92Bell · 18 Nov 2018 at 19:21

bremen1874 said:
Tried a bios reset?

How would i go about that?

Adam92Bell · 18 Nov 2018 at 19:57

Made some progress, ive got the pc working with the new GPU. however, if i plug in the 2 extra 4 pin fan plugs from the PSU, it wont fire up