Good, but minecraft will hurt with that processor. do not get the 4130, at least get the 4300, if not the 6300 is the best bang for your buck.
recommended build:
PCPartPicker part list:
http://pcpartpicker.com/p/2Gzql
Price breakdown by merchant: http://pcpartpicker.com/p/2Gzql/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2Gzql/benchmarks/
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($114.98 @ SuperBiiz)
Motherboard: ASRock 990FX Extreme3 ATX AM3+/AM3 Motherboard ($109.99 @ Newegg)
Memory: Corsair Vengeance Pro 8GB (2 x 4GB) DDR3-1600 Memory ($76.99 @ Amazon)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.67 @ Amazon)
Video Card: Asus Radeon HD 7770 2GB Video Card ($114.99 @ NCIX US)
Case: NZXT Guardian 921 RB ATX Mid Tower Case ($69.99 @ Mwave)
Power Supply: Corsair Gaming 600W 80+ Bronze Certified ATX Power Supply ($69.99 @ TigerDirect)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer ($16.98 @ OutletPC)
Total: $633.58
ik it is $630 but it is so much better than the Build you have there, worth the extra 30. (side note, the stock heatsink/fan with AMD fx cpus gets quite noisy when gaming, just a heads up).