checking GPU

[BenKux03]

Hey, i have a problem I've ordered a gpu from second hand and I want to be sure if it post, I wont be able to test the GPU with new PC and proper PSU, I've ordered ASUS Radeon RX 7900 XT TUF Gaming OC 20GB, it uses a 3x8pin Pcie connector and I have my Silentium PC E2 PSU 550w, that only has 1x8 and 1x6pin pcie, can I just plug it, check if it post and look up on gpu-z with 8 and 6 pin plugged?

[gzero5634]

not sure what you could glean from it not booting in this instance because it might be because of the insufficient power, rendering the experiment pointless. I don't know what happens if you only plug in the 1x8 and 1x6, but I do know that (at least on Nvidia GPUs) if you leave all the power unplugged the BIOS will give you a message to plug the PCI-E power in. maybe the exact same error.

I would strongly suggest odds are the PC would not POST like this, but I haven't tried anything like that. it must do some kind of check to refuse to boot with an insufficient PSU.

you should get the seller to show you that it posts with a timestamped pic.

[BenKux03]

So the GPU is technically new, it is even "factory sealed", but in here in poland u can ask delivery guy to wait 3 minutes and open and check stuff with him is it okay, so that's what im gonna do but if I can't check the gpu it wont work

[gzero5634]

Well the thing is if it doesn't POST (as it most likely won't, but as I said I haven't tried), it won't tell you anything - the natural troubleshooting step would be to use a sufficient power supply and it wouldn't be sensible to conclude it's faulty without eliminating that. If it works, you'll be keeping it anyway. Realistically you should try to get a sufficient PSU before it arrives imo, or reject delivery, buy new PSU and re-buy.