So why did you choose that mother board over the 1 i pick? I already have the thermaltake chaser mk-1 tower. I also dont know how to select the power supply so that is why i pick the one i choosed but didnt know that would be to big how do you know how big the power supply u need?
No particular reason why I chose that motherboard. I just like ASRock's motherboards. You can go with the Gigabyte Z77 UD3H if you want. It's a great motherboard too.
As for the PSU, the site I am using estimates power consumption for you. Plus, experience goes a long way. I've been on this site for quite a few months and have read countless articles. You'll want to make sure your PSU is 80+ certified and is manufactured by a reputable company such as XFX, Seasonic or Corsair just to name a few. The power supply you chose is actually a great PSU. It's just a little overkill for your needs. A 750w PSU would be more than enough for two 7970s in Crossfire.
Okay sounds good and thank you for the help it was very helpful and what website do u use to see what PSU size u need I would like to try that and see what it say never knew there was a website like that lol
The estimated wattage is in the upper right hand corner of the chart. Or perhaps I should say it is to the right and about half way down of the page right after you click on the link. You can add a second 7970 to the list to get an idea of how much power would be needed for that particular build. Same idea applies to other builds.
And no problem. Glad I could help; good luck with your build!