Building mid grade PC, need help

I am building a mid grade pc so i decided to follow logans video. I stuck to most of the parts he suggested. I had to change it a little due to price, will this work? 

AMD Phenom II X4 965 AM3 3.4Ghz 512KB 45NM 125W 4000MHZ

MSI Computer Corp. Motherboard North Bridge AMD 970 & South Bridge AMD SB950 Chipset ATX DDR3 800 AMD AM3+ Motherboards (970A-G46)

Sapphire Radeon HD 7870 GHZ OC 2 GB GDDR5 Graphics Card

G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 2133 (PC3 17000) Desktop Memory Model F3-17000CL11D-8GBXL

Cooler Master eXtreme Power Plus 500w Power Supply (RS500-PCARD3-US)

 http://teksyndicate.com/videos/build-mid-grade-pc-us-edition-nov-2012 

 

looks good build it