Hi --

I need to replace the case fan on a Micron Millenia XKU 300 tower model. I called Micron and was told that the fan is 92mm variable speed. I am going to order it from http://www.cyberguys.com but out of the three available I don't which is the right one. Here are the options:

Case Fan, 92mm Case Fan @ $2.99
Case Fan, 92mm Ball Bearings @ $6.19
Case Fan, 92mm Dual BB W/MB Connector @ $6.99

What's the difference between these three and how do I choose?

Thanks,
Robin

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