What's the speed of the 2 computers? And the speed of the 2 Hard Drives? How much stuff is running on each?
It's nice that they sell cards that can transfer 100MB/s, but you really can't get too much faster than 1.5-2Mb/s no matter what you do, as your computer can only DL, translate, and write the stuff to the hard drive so fast through the relatively small bandwith within the motherboard and slow speed of IDE hard drives (which I'm going to presume that you have)
