Last year I installed a hard drive for a friend. The HD has, I believe, an ATA-100 interface(if I have that correct), and came with an 80-pin cable.
Now, his newer Abit board could support the interface, but the 80-pin cable was simply not long enough, so I used his previous 40-pin cable. HD works fine.
Question: how much of a performance hit, so-to-speak, did I create by not getting him a longer 80-pin cable?