Quaddro managed to do the impossible. Hats off to you sir!
I will offer another alternative because the Pentium G620 is only a non-hyperthreaded dual core. There are several games that require more than that these days and that CPU may even bottleneck the HD 7750 not due to a lack of processor speed, but a lack of individual cores. It is quite possible to game quite well with the proper AMD A-series APU, so I will offer that as an alternative because its four individual cores will satisfy games that require more than two. It will also have those cores to run background applications while gaming without taking any resources away from the game itself. Here's the alternative:
APU: AMD A10-6800K (with on-board Radeon HD 8670D) - $140 (free shipping)
http://www.newegg.com/Product/Product.aspx?Item=N82E16819113331
Motherboard: BIOSTAR AMD A55MD2 v7 - $45 (free shipping) - $45
http://www.newegg.com/Product/Product.aspx?Item=N82E16813138370
Total Price: $185
Now this will not game better, but it will game longer as the CPU requirements of threaded games increases. The A10-6800K also holds its own in most games (I used Skyrim as an example):
Now this is by no means a better solution than Quaddro's. It is simply an alternative that allows you to have a quad-core CPU with a relatively weak gaming GPU included. When that Pentium G620 hits some games that require 4 cores, your fps will drop like a rock while the A10 will remain steady. The negative part is that for games not needing more than 2 cores, Quaddro's setup will eat this one alive. Whichever you choose, you will enjoy it. Cheers!