I decided not to go crossfire in the future is my PSU still good or is it to much?

  1. CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor ($169.99 @ Microcenter)                                          
  2.  CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.99 @ NCIX US)
  3. Motherboard: Asus P8Z77-V LK ATX LGA1155 Motherboard ($124.24 @ NCIX US)                                             
  4. Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-2133 Memory ($49.99 @ Newegg)
  5. Storage: Kingston HyperX 3K 120GB 2.5" Solid State Disk ($109.00 @ Adorama)
  6. Video Card: Sapphire Radeon HD 7970 3GB Video Card ($366.97 @ Newegg)
  7. Power Supply: XFX ProSeries 750W 80 PLUS Silver Certified ATX12V / EPS12V Power Supply ($109.99 @ NCIX US) Total: $1005.17

Yes that's great dont worry :)

You might be better off with a lesser PSU, but its not a big deal. Its more important to get a good one. And who knows, maybe you will add another card in the future.