You see below. I have kept everything the same in terms of specification. And still you manage to get a GTX 1060 (6GB) at 13 bucks extra. And 1060 is almost twice as fast as the 750ti with much newer technology. Not to mention the psu in prebuilds are almost always crappy.
PCPartPicker part list:
http://pcpartpicker.com/list/xvWX2R
Price breakdown by merchant: http://pcpartpicker.com/list/xvWX2R/by_merchant/
CPU: Intel Core i7-6700 3.4GHz Quad-Core Processor ($293.99 @ SuperBiiz)
Motherboard: Asus H110M-A/M.2 Micro ATX LGA1151 Motherboard ($47.98 @ Newegg)
Memory: GeIL EVO POTENZA 16GB (2 x 8GB) DDR4-2133 Memory ($66.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($49.49 @ OutletPC)
Video Card: EVGA GeForce GTX 1060 6GB 6GB GAMING Video Card ($234.98 @ Newegg)
Case: Zalman Z1 ATX Mid Tower Case ($24.00 @ Newegg)
Power Supply: SeaSonic S12II 430W 80+ Bronze Certified ATX Power Supply ($44.99 @ Newegg)
Total: $762.42
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-10-23 01:59 EDT-0400