How good is this computer for gaming and the like?

[Moomba445]

I'm making a desktop Computer, and I am going to be using this computer for gaming, simulating circuits, writing documents, writing and running programs in C, C++, and VB. I am on a budget of $1500, and the parts that I chose are just short of this budget. Here are the components of my PC:

Case
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119138

Power Supply
http://www.newegg.com/Product/Product.aspx?Item=N82E16817814006

Motherboard
http://www.newegg.com/Product/Product.aspx?Item=N82E16813188046

RAM
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231225

Processor
http://www.newegg.com/Product/Product.aspx?Item=N82E16819115202

Graphics Card
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130433

Hard Drive
http://www.newegg.com/Product/Product.aspx?Item=N82E16822136320

Internal Card Reader
http://www.newegg.com/Product/Product.aspx?Item=N82E16820223109

Disc Drive
http://www.newegg.com/Product/Product.aspx?Item=N82E16827136153

Monitor
http://www.newegg.com/Product/Product.aspx?Item=N82E16824236056

I am hoping that these parts are all compatible and will run at maximum capacity. I want to be able to run games on high performance. Does anoyone know if these parts are all compatible and will run at full capacity with my motherboard? Also, will the power supply fit in this case? Tell me what you think and what I can do to improve it within my price range. Thanks alot!
Here is the Keyboard and Mouse. Just cheap crap to get the job done for now.

Keyboard
http://www.newegg.com/Product/Product.aspx?Item=N82E16823126015

Mouse
http://www.newegg.com/Product/Product.aspx?Item=N82E16826104026