I've recently gotten a new pc, and while it runs most of my games fairly well, it falls short in some places. I'm looking to upgrade the PSU/GPU since it's running off the nvidia 9100 chipset, which isn't built for gaming.
You have a micro atx psu, therefore only a micro atx form factor psu will be able to fit into your case. Here's a replacement (upgrade) of not so great quality, but you have to take what you can find. Athena Power AP-MP4ATX47FE 470W MicroATX / SFX12V / EPS12V / ATX V2.2 SLI Ready CrossFire Ready eMachines, HP Upgrades/Replacement Power Supply found on newegg.com for about $60 shipped.
Does the psu fit snugly into the case? Or does it have spare room within its compartment? It would be best if you knew the dimensions of your case's psu compartment (assuming there is one). Obviously, then it would be easy to find a psu that would match those dimensions.