lol it doesnt really say what the CPU is, how much ram it has etc. but looking at the requirements of the game everything should fit and should work. It will be tight tho putting in a PSU into a micro case....
to make sure you can always pull out a ruler and measure the three dimensions of the PSU in it currently and compare them to the one you're buying.
But like I said try to extend to buying a 5750/5770/6750/6770/ or a current 7750
the video card will for sure fit, as your PC will have an empty PCI-E slot. The PSU should most likely fit, i have built a handfull of micro ATX PC's and changed a few OEM PSU's and havent had any trouble ever.... but i mean if I were you i'd open it and look, does the PSU measure to be normal sized? itll take 5 mins to check