The Tuniq's fan is inside. That's why you don't see it.
The difference between SATA and PATA, is the transfer rates and size of the cable. SATA is much smaller and a little faster. The cable makes it easy to route the cables, where you want them.
The OEM means, you just get the product itself. No cables, box, or manual. Don't worry, your motherboard has the require cables.
no manual even? jeez...hope I can put it together...