I'm wanting to know what would be the best power supply and Nvidia GPU that would be compatible with this motherboard.
If you want cheap, a Corsair CX430 and a GTX 750 Ti would work well. Other than that, I would guess that the sky is the limit depending on your budget.
Your best bet for more informed answers though would be to pop off the side panel and take pictures of the motherboard and stuff and post them here.
760 from asus or MSI with a min of a 600w psu that's bronz or better. look for 12v amps of at least 30 or greater when looking at the power specs in the pics on the websites
https://www.dropbox.com/s/pvtwn3vkdq8ijg3/20140317_090739.jpg
I'm having trouble posting the picture so there is the link to it instead.
I wouldn't mind having a GTX 760 but I'm not sure if it would fit.
for the power supply would this work?
http://www.bestbuy.ca/en-CA/product/corsair-corsair-cx-series-600w-power-supply-cp-9020060-na-cp-9020060-na/10239557.aspx?path=52d804206fa62d23f63aa4f1bc02a1cden02
it will fit, just need to move some cords out the way a bit. and for the PSU.. never link crap from bestbuy.. just never, newegg is where to look at as well as link
Depends on how much you want to pay. Almost anything will beat a GTX 625.
GTX 760 + 550-600w PSU would probably do. Get a modular power supply, like the CX600M. It'll help with your small case.