Zitat von kompensat0rEs ist von der Geschwindigkeit her irrelevant, wie die Kabel "geschaltet" sind
ja sicher ..
Zitat von http://en.wikipedia.org/wiki/Advanced_Technology_Attachment#Parallel_ATA_InterfaceATA's ribbon cables had 40 wires for most of its history, but an 80-wire version appeared with the introduction of the Ultra DMA/66 (UDMA4) mode. All of the additional wires in the new cable are ground wires, interleaved with the previously defined wires. This results in a ground wire in between each pair of signal wires, which reduces the effects of capacitive coupling between neighboring signal wires, thereby reducing crosstalk. Capacitive coupling is more of a problem at higher transfer rates, and this change was necessary to enable the 66 megabyte per second (MB/s) transfer rate of UDMA4 to work reliably. The faster UDMA5 and UDMA6 modes also require 80-conductor cables.