Hi
Sandy Bridge supports up to 2133MHz speeds so they will work, however you will have to do some tweaking to get them to work at their rated speed.
Good choice with the PSU, but you might be cutting it close if you run 2 580's in the future.
Thanks for letting me know. Then i might go for the Corsair AX1200 but then will this fit with the matx case's like Silverstone TJ08-E or Fractal Design Define Mini?