I would not keep an H100 or any other CLC, especially one that is 5+ years old. No telling when the pump will fail and when it does you have no CPU cooling at all until you replace the CLC.
Phanteks Owners Club Ways to Better Cooling
i7 980 @ 3.55GHz =PH-TC14PE w/2x TY-143 fans =Crucial Ballistix 3x4GB =GA-X58A-UD5 =ASUS GTX580 DirectCU II =Enermax Modu84+ =Define R2 w/3x TY-140 case intake fans; all PWM controlled by CPU fan socketPhanteks Enthoo Primo MoBo Rampage III Extreme CPUi7 980X
@ 4.0GHz =R1 Ultimate
w/2x TY-143 fans =Dominator GT 6x2GB
=Rampage III Extreme
=ASUS GTX580 DirectCU II
=Enthoo Primo w/ custom castor base