- 750w for this build are too much, a 650w would fits better (damns prices are soo low compared to Italy, and EVGA PSU 750w is 150€) this system consume 450w on full load
- you don't need a sound card if you don't have particular needs, the one included into the motherboard is enough;
- gtx960 isn't much worth better get a Sapphire R9 380 nitro, 10% faster and will be much better with DX12
- i think the ram you chose arent' low profile so you should get the Universal model of Cryorigh h5, honestly i would go for Corsair vengeance lpx 3000mhz CL 15, or G.skill trident z 3200mhz cl 14
- good motherboard, but i would consider Asrock z170 extreme 4 (dunno if this brand is famous in America, but in Italy is more appreciated than ASUS and cost much less)