Check this overclockable build:
PCPartPicker part list:
http://au.pcpartpicker.com/p/1xA2Z
Price breakdown by merchant: http://au.pcpartpicker.com/p/1xA2Z/by_merchant/
Benchmarks: http://au.pcpartpicker.com/p/1xA2Z/benchmarks/
CPU: AMD FX-4130 3.8GHz Quad-Core Processor ($109.00 @ PCCaseGear)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($39.00 @ Mwave Australia)
Motherboard: ASRock 970 EXTREME4 ATX AM3+ Motherboard ($119.00 @ PCCaseGear)
Memory: Kingston HyperX 8GB (2 x 4GB) DDR3-1600 Memory ($85.00 @ PCCaseGear)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($72.00 @ Mwave Australia)
Video Card: Gigabyte GeForce GTX 650 Ti 1GB Video Card ($129.00 @ PCCaseGear)
Case: Corsair 200R ATX Mid Tower Case ($79.00 @ Mwave Australia)
Power Supply: Antec High Current Gamer 520W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($89.00 @ PCCaseGear)
Total: $721.00
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-08-29 22:37 EST+1000)