I remember when Y.S. TECH ( Yen Sun Technology Corp.) released specs on their new TMD (Tip Magnetic Driving) fan. Being an air-cooling person, I was very excited about the new fan technology. Basically what Y.S. TECH has done is taken the motor from the center (hub) of the fan and moved it to the corners of the fan. Let's take a look at Y.S. TECH's latest offering courtesy of AZZO Computers.
AZZO wrapped up the TMD fan in large bubble wrap to make sure it survives the shipping process.
Let's take the fan out of the bag and take a better look. This fan is the new medium speed TMD (5800 rpm on this version versus the 4500 rpm on the low model) and is 74mm x 74mm x 15mm with 12 inch power leads. The top picture is the top of the fan, the bottom picture is the bottom of the fan. If you look at the bottom image you can see the supports for the fans hub.