Computer Build Ideas

Does the build include monitor/keyboard/mouse/OS or not? If not that will look completely different.

If not:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-3470 3.2GHz Quad-Core Processor ($199.99 @ Newegg)
Motherboard: ASRock H77 Pro4/MVP ATX LGA1155 Motherboard ($87.55 @ Newegg)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($39.99 @ Newegg)
Storage: Samsung Spinpoint F3 1TB 3.5" 7200RPM Internal Hard Drive ($69.99 @ Newegg)
Video Card: Sapphire Radeon HD 7870 GHz Edition 2GB Video Card ($251.97 @ Newegg)
Case: Cooler Master HAF 912 ATX Mid Tower Case ($59.99 @ Newegg)
Power Supply: Corsair Builder 600W 80 PLUS Certified ATX12V Power Supply ($61.98 @ Newegg)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($17.99 @ Newegg)
Total: $789.45
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2012-12-12 15:20 EST-0500)

The computer will need everything, but a monitor. For the OS I would like windows 7. I noticed your suggested parts and have some other pieces that I found,

Processor:
AMD FX-4170 4.2GHz Quad-Core Processor
http://pcpartpicker.com/part/amd-cpu-fd4170frgubox

Would there also be a chance at getting a cheaper case?

If you are building a gaming PC I would not choose AMD over the intel i5 CPU he linked above. If you add $99 for Windows 7 64 bit version you will have a real nice gaming PC for any game on the market.
Here are some cheaper case options

NZXT GAMMA Classic Series GAMA-001BK Black Steel ATX Mid Tower Computer Case $39
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Thermaltake V3 Black Edition VL80001W2Z Black SECC $44
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Rosewill REDBONE Black SECC Steel ATX Mid Tower $44
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Is an Audio card or a cpu cooler needed for this build and if so can you suggest any?

No on the audio card unless you think you need more sound than the mobo provides. Most motherboards include great sound. The CPU he chose for you cannot be overclocked so the stock cooler will be fine.

But if you need everything though then the i5 won't be an option. You will have to cut corners somewhere. I'd get the FX-6300 over the FX-4170.



The sound card isn't needed, the audio built into your motherboard will work fine.