CPU fan replacement

[Raignis]

My cpu cooler fan has a 92mm fan and I'm looking to replace it. The current fan's air flow is rated at 51.1 MCF and the one I'm looking to use is 39.8 CFM. Now one is listed as MCF and the other is listed as CFM but, can I assume they are the same units? If they are, would that air flow loss be significant enough to cause problems?

I'm using it on an Athlon II X2 240 Regor 2.8GHz cpu, no overclocking and the most I use it for is for WoW and Rift. The reason for wanting to replace it is just aesthetics.

 

[FALC0N]

The only measurement I am aware of using the acronym MCF equates to 1000 cubic feet. Not exactly sure how that relates to a cpu fan/heatsink. Sure isn't doing that much per minute.

 

[4745454b]

I'm not aware of what that would be either. Seeing as this is for something important, just grab a 92mm fan that can do 50CFM or better.