is my pc with standard equipment good enough for a gtx 660?

bronzedrake

Honorable
Aug 25, 2013
4
0
10,510
i have a HP Pavilion Elite HPE-450sc with all the standard equipment and i want to change the GPU to a MSI GeForce GTX 660 without having to change the PSU can i do that? and for a wild thought is it possible to change it to a MSI GeForce GTX 760 without changing the PSU?