Is PcPartPicker Reliable???

Super reliable. Basically everyone in this community uses it, it is not only organized, but it helps with compatibility (to an extent). Here is a build for around the same price but there is some stuff that's fixed/more reliable.

PCPartPicker part list / Price breakdown by merchant

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($109.98 @ OutletPC)
Motherboard: Gigabyte GA-970A-DS3P ATX AM3+ Motherboard ($66.99 @ Newegg)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($79.99 @ Amazon)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($52.91 @ OutletPC)
Video Card: Asus Radeon R9 270X 2GB DirectCU II Video Card ($174.75 @ Newegg)
Case: Corsair 200R ATX Mid Tower Case ($39.99 @ Newegg)
Power Supply: SeaSonic 520W 80+ Bronze Certified Semi-Modular ATX Power Supply ($73.98 @ SuperBiiz)
Total: $598.59
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-08-04 00:20 EDT-0400
 
PCPartPicker part list / Price breakdown by merchant

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($109.98 @ OutletPC)
Motherboard: Gigabyte GA-970A-UD3P ATX AM3+ Motherboard ($73.98 @ OutletPC)
Memory: G.Skill Ripjaws Series 4GB (2 x 2GB) DDR3-1333 Memory ($44.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($57.98 @ OutletPC)
Video Card: XFX Radeon HD 7850 1GB Core Edition Video Card ($179.99 @ SuperBiiz)
Case: Cougar Solution (Black) ATX Mid Tower Case ($19.99 @ Newegg)
Power Supply: EVGA 500W 80+ Certified ATX Power Supply ($29.99 @ NCIX US)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer ($14.98 @ OutletPC)
Total: $531.88
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-08-04 00:27 EDT-0400