(PSU) and Motherboard

[Gamerman2011]

Ok I was wondering if there was a way to find the PSU on my Motherboard by looking at it by opening the case? I have SIW.exe by thats not helping.
I have a MSI G41M-P33 (MS-7592) [no serial]

I have read online you can test it manually but i'm trying to find my power limit. I don't want to shove a 500w power supply unit in to find out that the limit is 430w or 400w.

 

[johnb35]

The motherboard won't tell you what power supply you have. You will have to open the case and look for a model number on the psu itself to find out what you have. If you give us a list of your system specs, we can tell you what size and brand of power supply you really need.