This is one reviewer said about this cooler:
"I don't know about anyone else, but after running these tests I was left speechless. I have always considered Thermalright heatsinks as the best in the business, and here it just got trounced by the Sytrin VF1.
For the maximum overclock run I even replaced the Thermalright's stock fan with 2 high-speed 80mm fans pushing 150cfm total, and even so the Sytrin easily outperformed it in both temperatures and maximum overclock. With the stock V-1 fan the max overclock on the core was only 570"