I replied earlier with some additional info, but don't see the reply so must have done something wrong. Here it is again.

My Pentium 4 3.2 GHz PC is 32 bit Win XP with 4 GB RAM that, if I recall correctly, was the fastest RAM supported by the motherboard. There are two 1 TB 7200 rpm SATA drives. Lawrie is correct - the drives are 3 Gb/S but the mobo's controller is only 1.5. There are jumpers on the drives to make them operate in 1.5 mode so that they will work with the mobo.

BIAB generates the RT/RD's in about 30 seconds, depending on style and song length. That is not bad considering all that it must have to do to generate the tracks. The problem (minor) comes when I am trying out different styles for the same song. The time adds up after trying 5-10 or more different styles. (It's worth the wait though. RT's and RD's sound really good.)

For various reasons, I've been wanting to upgrade my CPU, which would require also upgrading the mobo, RAM, and video card (current video card is an old AGP card). A new mobo would also allow running the SATA drives at 3 Gb/S. So if the slower Pentium CPU or the 1.5 Gb/S drives are bottlenecks for generating RT's, it would be one more reason to upgrade.