In this video I build an entirely semi-passive gaming PC, with an i7 4790K and up to a Strix GTX 980. Everything is completely passively cooled even when light gaming. ^-^

Full parts list:
Intel Devils Canyon i7 4790K @ 4.5GHz
Asus ROG Maximus VII Hero
Corsair 16GB 1600MHz LP Vengeance Memory
Asus Strix GTX 980, 970 & 780 OC Edition Cards
Noctua NH-D15 CPU Air Cooler
Noctua IndustrialPPC Fans
Corsair Graphite 730T Case
Corsair AX1200i PSU
Corsair 120GB Force GT SSD