I recently bought the CORSAIR Builder Series CX500 500W PSU
I want to know if it wont be any problem of compability with this card and my motherboard because it have a PCI Express x16 v1.1 port. I use a resolution of 1680x1050
This is a faster version of the Evga 650ti you linked and its 10 dollars cheaper to boot.
Pcie 1.1 x16 is fine since it pretty much is the same bandwidth as a pcie 2.0 x8. That is what high end 2.0 SLI/Crossfire bandwidth is and there is really no issues. You won't notice any difference at all and all cards are backwards compatible.