How to check if PSU is faulty?

[G2401]

Hey guys. I have been having an ongoing problem for the past few months or so. I put an MSI Radeon R7770 into my computer, trying to play a step up from my Radeon HD 5450 512mb, but a recurring problem surfaced. Whenever I would try to game with the card, my computer ended up giving me the BSOD, and shutting down. I've narrowed it down to either a faulty card or a faulty PSU. I bought the PSU specifically for this graphics card considering it needed a 6-pin adapter. The 5450 doesn't require one, so the PSU may be at fault. I want to know how to check without having to pay a ton of money for a professional to look at it. Unfortunately I do not have a spare PC to test either in. Currently my specs are:

CPU: Intel Core 2 Duo E8400
GPU: Radeon HD 5450 512mb
PSU: Antec 500w
Motherboard: Vostro 230

If there are any questions, or I didn't elaborate enough, please ask! Thank you in advance.

 

[GhislainG]

You can't test a PSU with a program; you need a DVM or a scope. Until proven good, I'd suspect the GPU more than the PSU.

 

[G2401]

You can't test a PSU with a program; you need a DVM or a scope. Until proven good, I'd suspect the GPU more than the PSU.

Thanks so much for all your help. I will RMA the 7770 and give an update when it comes.