Im just double checking if my computer can handle these.?

If i get a PNY XLR8 GTS 250-1024 MB PCI-Express 2.0 Dual DVI Graphics Card VCGGTS2501LXPB with a PSU of a Corsair VX450W Power supply - 450 Watt and my computer model is a ET1331G (emachine) Thank you!