I just bought a TDK VeloCD 16/10/40 and it has a fan on the back of it. It (the fan) appears to be about 1" in diameter, it is in the rear corner of the drive, and the drive is almost an inch longer than a standard length CD ROM drive. I have no idea who makes it or why and I dont care as long as it works like it is supposed to. Jeez, I'll upgrade to a 30/24/75 long before I ever wear the darn thing out anyway.