[SOLVED] Possible bad psu

[mikemillard4]

I just bought a new gpu, msi gtx1650 super, and when I plug it in the pc wont power up. It does power up without the card no problem. I initially thought it had to be the new card so I sent it back and the replacement just came in but I still have the same problem. Could it be 6 year old corsair CX 750 M is just failing me or would that cause the pc to not boot at all. I have used the psu picker tool and am told i shouldn't need more than 500 watts so I dont think its a problem of the psu just being to small.

 

[Vic 40]

What parts in the pc? Or maybe even oem?

Look at this,
HP OEM black screen door gpu upgrade teniet doen.
if your pc has a secure boot option and it is enabled might it be good to disable.

 

[mikemillard4]

What parts in the pc? Or maybe even oem?

Look at this,
HP OEM black screen door gpu upgrade teniet doen.
if your pc has a secure boot option and it is enabled might it be good to disable.

Its not an HP, its a custom build with the asus z270 motherboard, i5 7600k, 16gb of ddr4 with a 250g sandisk ssd and a 2tb kingston hdd

 

[Vic 40]

Got the latest bios on the motherboard?

 

[JadeHarley]

CX750 is not very trusted actually, I had a lot of problems with them, exactly with 750 models, idk if they fixed the throttle

 

[geofelt]

You do need an aux 6 pin connector for the graphics card. I presume it was plugged in.

400w is sufficient so your psu certainly has the specs.
The only way to test for a bad psu it to test with a known good unit.
That said, your symptoms do not smack of a psu issue.

Modern graphics cards want to use a uefi bios.
If your bios is in legacy mode, that could be the issue.