thank you for your reply i have another question if i get the second gtx 760 later and sli will the 4570 cause a bottleneck?
By the time anything comes along that requires a second GTX 760 in Sli mode video cards themselves will have advanced and there will most likely be a single video card available that is up to the task, the GTX 760 is also large and a single card takes up two slots - I have an Antec 900 V3 case and the GTX 760 only just clears the HDD on the opposite side of the case.
i want to ask you something about the psu you suggested thx cx750 i should go for that or pay a little more and go for the tx750 or for the xfx xxb9
The CX750 is fine but if you do change it the TX750 would be my choice.