A 2 x 140mm radiator has similar surface area to a 3x120mm. Slightly less. However 140mm fans generally suck. Pair the radiator w/ a 120mm Gentle Typhoon and the Bgears 140mm adapters and you'll be golden. Case and radiator choice is important. There are 140mm radiators that use a fan spacing of 20mm and others that use 16mm. Most cases uses 20mm so be careful what you buy. You'll end up a problem like this.