PC not booting with GPU

RichieD

RichieD

RichieD

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Joined
8 Jan 2024
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19
Location
London
I built a new PC and when the new GPU is plugged in the PC won't boot. Stuck in an on/off loop every 5 seconds.
Cleared CMOS, stripped parts to minimum and putting parts in 1 at a time. No luck.
It has been tested in another system and works.
I updated BIOS, checked connections and got a more powerful PSU.
An unpowered old GPU works in PCIe slot. GT 210
Windows 11
Intel i5 12400
Radeon RX5500 XT GPU
MSI Pro B760m-P Motherboard
Crucial P3 Plus M.2
Hyper X Fury DDR4 4*8GB RAM

I really am stuck now. It's my first build too.
New motherboard or GPU?
All parts are brand new.
 
My PSU is a Corsair CX650F RGB. Fresh Windows install.
The onboard GPU works and I tried the RAM in A2 & B2.
I've done just about everything offered in forums so I think I'll get another motherboard.
I will be upgrading the RAM when I can.
Is it best to get a Motherboard with 2 RAM slots? I also prefer mATX as I won't be using any more PCIe slots.
It's really distressing to have a new build have problems on my 1st ever build but I expect it's all learning.
 
therealdippy said:
So the PC boots fine with a GT 210 but not when a RX5500 XT is in that slot instead? PSU should be fine so my recommendation would be to go back to what boots and check pcie configuration in BIOS. The new GPU is pcie 4 but the old one is (IIRC) only gen 2. I checked the online manual for the mobo but there is nothing about BIOS config. Pcie slots should train for the correct speed but maybe that BIOS needs a separate setting for gen 4.
Click to expand...
I changed the PCIe setting to Gen 4 in BIOS when I first booted the new setup.
I'm ordering another motherboard and if it then works, great. If not, then send new mb back and get a new GPU.
 
therealdippy said:
So the PC boots fine with a GT 210 but not when a RX5500 XT is in that slot instead? PSU should be fine so my recommendation would be to go back to what boots and check pcie configuration in BIOS. The new GPU is pcie 4 but the old one is (IIRC) only gen 2. I checked the online manual for the mobo but there is nothing about BIOS config. Pcie slots should train for the correct speed but maybe that BIOS needs a separate setting for gen 4.
Click to expand...
Update: I bought another new motherboard and I still have the same problem.
MSI can't help with a new solution.
I've ordered an MSI GPU, Radeon RX 580 Armor 8GB.
This is the only other thing to replace now. Fingers crossed.

​

 
pallys said:
If the gpu worked in another system but does not work with your 2 new motherboards then you should try and borrow a different psu also to rule that out.

If its stuck in a boot loop then try ruling the os install out by using a Linux Live cd/USB or ddu gpu driver re
Click to expand...
I have tried everything during the last week or so, from MSI to a few forums like this one.
 
Vince said:
what power supply is in it? Ahh I see some smart dude already asked. I mean one thing i would try is changing the PCIe version in the bios and seeing if it boots using a different PCIe standard.
Click to expand...
I tried that.
Someone said build the pc outside the case, I did, what is likely to be shorting if it was the problem? Have you come across it before.
A few people suggested it to try.
 
UPDATE:
I got a new GPU and the PC boots, all working.
Very strange. I sold the other one which was tested working.
I'm glad it's done.
Thanks to everyone for trying to help.
 
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