On rads, it is not how many CFM a fan puts out, it's how much pressure it builds up. It takes pressure to push the air through the rad. A lower CFM fan with higher static pressure will do better. I know on OCN one of the more popular fans there is the Scythe Gentle Typhoon AP-15, they spin at 1850 RPMs but only put out 58CFM, but supposedly have high static pressure.
Yes I know about SP fans that is why I opted for the Corsairs HP /SP120's mine are good mine are 3.1mm H2O CFM 62.74
Anyway i'm about to break down this beast and take the 620 back also I am going to point out fry's has that same khuler for 20 dollars cheaper

My Computer
At a glance
Windows 10 Home Premium 64bit sp1Intel I7-6700K @ 4.6 Ghz 1.344 volts everyday OC32GB G-Skill TridentZ 3200mhz 16-18-18-38 DDR4Sli Gigabyte Windforce GTX 980 G1
- Computer type
- PC/Desktop
- Computer Manufacturer/Model Number
- CoreI7-6700K MrFingerIII Special Builds
- OS
- Windows 10 Home Premium 64bit sp1
- CPU
- Intel I7-6700K @ 4.6 Ghz 1.344 volts everyday OC
- Motherboard
- Asrock Fatality K6 Z170 Socket 1151
- Memory
- 32GB G-Skill TridentZ 3200mhz 16-18-18-38 DDR4
- Graphics Card(s)
- Sli Gigabyte Windforce GTX 980 G1
- Sound Card
- AC97 Creative Rage Tactic 3D Headphones Bluetooth
- Monitor(s) Displays
- 27" Asus ROG Swift PG278Q G-Sync 48" Vizio Smart HD TV
- Screen Resolution
- 2560x1440p 27"- 48" Currently Gaming at 2560x1440p Res 2K
- Hard Drives
- 250GB Samsung Evo840SSD Seagate baracuda 500 GB WD Mybook 500Gb 1TB Seagate Barracuda
- PSU
- HX1050w Corsair Silver 80plus certified crosfire/sli
- Case
- Enthod Pro Full Tower
- Cooling
- Corsair H110i GT 280 mm High Performance WaterBlock
- Keyboard
- Logitech wireless keyboard
- Mouse
- Logitech wireless mouse
- Internet Speed
- Cox Cable 100+ mb
- Antivirus
- WebRoot Spysweeper with Antivirus
- Browser
- IE-10, Chrome, Opera
- Other Info
- My Other Rig is a AMD FX8320E @4.6Ghz 16GB Ballistic Sport Ram
Mobo Asrock Fatality 990FX 120GB OCZ SSD 1TB Seagate Barracuda Corsair H75 Cooling PSU Corsair CX750
GPU GTX Gigabyte 970G1




