hp prebuild

Hello, I'm trying to upgrade an (I'll admit ancient) HP prebuild (ENVY 700qe) with it's original HP 2AF3 Motherboard, Intel Core i7 4790 @ 3.60GHz, and a 460 Watt PSU. I upgraded the system previously with a 4GB EVGA GTX 960 (low-profile card) and maxed it out with 32.0GB Dual-Channel DDR3 @...