you could use the 450w but it would be cutting it close i would just go with the 550w then you have headroom if you want to overclock the processor later on
i dont know if this helps
PCPartPicker part list:
http://pcpartpicker.com/p/3aJMV
Price breakdown by merchant: http://pcpartpicker.com/p/3aJMV/by_merchant/
Benchmarks: http://pcpartpicker.com/p/3aJMV/benchmarks/
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($109.99 @ Amazon)
Motherboard: Gigabyte GA-970A-DS3P ATX AM3+ Motherboard ($79.78 @ OutletPC)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($69.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($57.99 @ NCIX US)
Video Card: Asus Radeon R9 270X 2GB Video Card ($245.66 @ Newegg)
Case: NZXT Source 220 ATX Mid Tower Case ($44.99 @ TigerDirect)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($59.99 @ NCIX US)
Optical Drive: LG GH24NSB0 DVD/CD Writer ($14.99 @ Newegg)
Total: $683.38
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-16 06:38 EDT-0400)
are you ordering all the parts there or are you going to have them shipped to you from america
if you are ordering the parts there can you link me a couple sites you want to use?