@Chaotixblade: Amazon does not always give no tax and fast shipping. Amazon taxes these states: Arizona, California, Kansas, Kentucky, New York, North Dakota, Pennsylvania, Texas and Washington. Just because you don't live in one of the states doesn't mean Amazon never charges tax. Also, the shipping can take very long depending on where you live. I live in California and order from Amazon a lot. Shipping can take as long as 2 weeks before it arrives for me. That's because I live far away from a warehouse.
I don't even know why you would suggest a Sandy Bridge i3. i3 aren't that great for gaming now and SB pretty out-dated (IB is a much better choice)
For the price of that Gigabyte 7850 1gb, you can get a 2gb version from a different retail store.
The NZXT Gamma case is really old, not really recommend as its pretty much oudated as well.
Lastly, the CX500 psu is meant to be a cheap decent quality psu. You can get the XFX 550w from NCIX for $45. It'll be $5 cheaper than the CX500, higher quality and slightly more watts.
Therefore, I have come to the conclusion that your build is in fact cheaper, but is also lower quality.
Anyways, back on topic
@OP:
PCPartPicker part list /
Price breakdown by merchant /
Benchmarks
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($119.99 @ Newegg)
Motherboard: MSI 970A-G43 ATX AM3+ Motherboard ($69.99 @ Newegg)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($55.98 @ NCIX US)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($64.99 @ NCIX US)
Video Card: Sapphire Radeon HD 7870 GHz Edition 2GB Video Card ($199.99 @ Newegg)
Case: Corsair 300R ATX Mid Tower Case ($49.99 @ Newegg)
Power Supply: XFX 550W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($45.99 @ NCIX US)
Optical Drive: LG GH24NS95 DVD/CD Writer ($14.99 @ Newegg)
Total: $613.91
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-06-21 03:20 EDT-0400)
-A bit cheaper from your build.
-FX-6300 holds itself for gaming pretty well.
-This motherboard can't overclock very good, but its the cheapest 970 board. It's just used like a standard, non-overclocking board.
-8GB of ram at dual channel running at 1600mhz.
-1TB HDD, but I had to drop the SSD. It won't fit in this budget unless you're willing to lose a lot of performance.
-7870, fairly stronger gpu.
-Much better case. Great airflow, good cable management, feels solid.
-High quality psu.