best 800 dollars gaming pc????

you can start from this build
$750 before rebate

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4460 3.2GHz Quad-Core Processor ($184.99 @ NCIX US)
Motherboard: ASRock H97 PRO4 ATX LGA1150 Motherboard ($76.66 @ Newegg)
Memory: A-Data XPG V2 8GB (2 x 4GB) DDR3-1600 Memory ($69.99 @ Amazon)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($52.92 @ Amazon)
Video Card: EVGA GeForce GTX 760 2GB Dual Superclocked ACX Video Card ($229.99 @ Newegg)
Case: Enermax ECA3290A-G ATX Mid Tower Case ($34.99 @ NCIX US)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($35.99 @ Newegg)
Total: $685.53
Prices include shipping, taxes, and discounts when available
 
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