what PSU should I get I am currently running a 240W PSU from HP my PC is a HP DC7900 SFF I wanted to know what PSU I can upgrade to as I think my one I am using is slowly failing because recently I plugged in a HD 4550 graphic card also to help i removed the CD ROM as i do not need it. The reason I think that its failing is because very rarely the PC would freeze when I am web Browsing and using Microsoft Office like once an hour freezes for a minute
Below is my PSU cables that is compatible with motherboard
If you could find one with the exact same size, shape, and mounting mechanism, you could upgrade it with the same case, but I don't see a name for that form factor, so I wouldn't even know how to search for one. Also, that psu seems very compact, so I seriously doubt there are any more powerful psus at the same size. Using the spare 240W you've got might not be enough either, because according to this: http://forum-en.msi.com/faq/article/power-requirements-...
The recommendation for an hd 4550 is a 300W psu with 20 amps on the +12V rails.