Will be upgrading my Sandy Bridge rig from a Pentium G860 to i5 2500. Current GPU is a GTX 650. Would like to upgrade that as well. Have seen a $140 Zotac GTX 760. PSU is an Antec Basiq vp450. Each 12v rail (2) has 18 amps. Just one 6 pin connector so I'd have to run an adaptor. Would I be pushing it with a GTX 760 on this PC?