Whgat fans are on you gpu heatsink?
2 of these Scythe 100x12mm
Scythe "KAZE-JYU" Slim100mm Silent 100mm Fan (fits 92mm fan holes) - Med Speed - Sleeved Products Model: SY1012SL12M [SY1012SL12M] : Performance-PCs.com, ... sleeve it and they will come