Questions About Drive Speeds.

Is there any difference between ATA100 and UATA?

UATA is theoretically 33mb/s faster than ATA100, and yet people often say it doesn't matter because the 7200rpm drive is the bottleneck. If that's so, why are SATA150 7200rpm drives faster? I am saying, because I have two pcs, one with a 2mb cache ATA100, and another with a 2mb cache UATA. The latter seems faster.

Secondly, how much of a difference does the cache make, from 2mb to 8mb, and is it a real-life difference, as opposed to a theoretical one?

The difference between 2MB and 8MB can be very considerable - check out the FAQ at www.storagereview.com for details on that. They might also answer your other questions there.

I would link you but my dialup is acting up.

There is a ton of information that is very well organized in the storagereview FAQ's.