Question PC won't power up with GPU installed, boots fine when isn't ?

[Goatss]

A week ago, my pc stopped booting. Without much thinking and testing, I immediately concluded the PSU is dead since it was old and bad.

It wasn't. Bought a new PSU, a corsair 750w. Pc still won't boot with GPU powered up. Again without much thinking I concluded the
GPU is dead. This time I didn't take the wallet out right away and went to my bud and took his GPU to try it in my system.

PC still does not boot. Now my conclusion was it must be faulty PCI-E slot and i need a new MB, tried both in 2nd PCI slot, same thing.

So, before i bought a new MB, I also took my GPU to my buds and tried it in his system, the GPU is fine, his system boots with my GPU,
also, his PSU is weaker than mine and MB and CPU are older.

Today, the new MB arrived, Aorus elite v2 along with new CPU, R5 5600x and I thought this very puzzling situation is at an end.
It isn't. Once again the PC will not power up when the GPU is connected to PSU, it boots without being connected and I get a
message to connect the GPU to PSU.

GPU is 1070. The HDMI cable is connected directly from TV into GPU HDMI port. Hopefully I didn't miss out any details.

Any help would be greatly appreciated.

 

[boju]

A week ago, what was done to the computer? Any cleaning or cable rearranging? What happened? Just went kaput without any interaction inside the case?

 

[Goatss]

Hello, boju.

I added an m.2 drive, my old ssd died, installed windows on it and changed ram sticks couple days prior it just died during the night.

 

[boju]

Couldn't say what happened to old system. Possibly it's a separate issues now. The new issue being unsupported bios for 4th gen cpu. Does new motherboard box say 4th gen ready? It should being this long. Can try flash bios to newest using qflash plus. Manual explains how.

 

[Goatss]

On the box it says AMD RYZEN 5000 DESKTOP READY. I'm not sure if this means it could run the 5000 series out of the box or it could run it with the latest BIOS. I know how to Q-Flash, will try.

 

[boju]

5xxx series is 4th gen so it's not that, no harm in trying though. Think you're gonna have to recheck all connections to and from psu if modular. If you believe everything is right then maybe grab some fresh eyes. If no friend or family can help in this area try breadboard the motherboard on the motherboard box, install one stick of ram in 2nd slot from cpu and check graphics card is seating properly without case intervention.

 

[Goatss]

Will try and report back. Thank you for the replies.

 

[DRagor]

Are you using PCIe cables that came with your new PSU and not any others?

 

[Goatss]

Are you using PCIe cables that came with your new PSU and not any others?

Yes, the cables are original corsair, my old PSU was not modular.

 

[DRagor]

Yes, the cables are original corsair, my old PSU was not modular.

So this is quite puzzling. Usually symptoms you described are caused by either dead PCIe cables or dead GPU. GPU has been confirmed to be alive and you changed PSU and its cables. I'm wondering if your new PSU might be faulty. Could you have your good buddy borrow you his PSU to rule that out (wattage does not matter since all you want is to see it booting)?

Or just maybe (don't intend to be rude here) since it's your first modular PSU you connected wrong cables, or in wrong direction? Just thinking out loud.

 

[Goatss]

So this is quite puzzling. Usually symptoms you described are caused by either dead PCIe cables or dead GPU. GPU has been confirmed to be alive and you changed PSU and its cables. I'm wondering if your new PSU might be faulty. Could you have your good buddy borrow you his PSU to rule that out (wattage does not matter since all you want is to see it booting)?

Or just maybe (don't intend to be rude here) since it's your first modular PSU you connected wrong cables, or in wrong direction? Just thinking out loud.

Yes, it can be arranged, will try with his PSU.

No worries, i'll take any suggestion and idea. Getting pretty desperate here.
I will take a look at the cables, but i dont think you can connect wrong direction since the ends that end up in MB and GPU have hooks and the ends that go into PSU itself don't. They are clearly labeled, so i'm also pretty sure every cable is in it rightful place, but will double check.