Disc drives max transfer = ATA 133/100/66/33?



Well, this may seem a silly question but I genuinely don’t know, and Google is a bit vague on it, unlike HDD info.

But anyway - transfer rates for disc drives? Can they reach the same HDDs if the board is capable? Max for an 80 wire cable is 133, right? Can a disc drive do that or does an 80 wire cable make no difference to a 40 wire one?

Cheers guys!


IDE 3.5" is 40 pin and oldish 40wire, but only 80 wire should be used!!

Comparing speeds form ODD is with HDD is not useful, IMHO.
ODD speeds depend on the mediatype & content.


Thanks for reply.

So put simply, with ODDs, 80 wire cables are still better than 40 wire ones? Is that right?

Out of interest, what is the max that 40 wire cables can do - 33 or 66? And ODDs normally do 66 max? Just looking to get a bit educated.


@ groovemeister,

If you desire detailed information on Ultra DMA (80-Conductor) IDE/ATA Cables and Standard (40-Conductor) IDE/ATA Cables suggest reviewing the below Web Links ->

80 Wire IDE -> http://www.pcguide.com/ref/hdd/if/ide/confCable80-c.html

40 Wire IDE -> http://www.pcguide.com/ref/hdd/if/ide/conf_Cable.htm

To obtain optimal performance from modern computer hardware it is prudent to use Ultra DMA (80-Conductor) IDE/ATA Cables.

Suggested using Google Search (http://www.google.com) and/or WikiPedia (http://en.wikipedia.org) to ReSearch topics that are of interest to you.



Thank you, I will take a look at those guides.

I did very obviously check out Wiki and Google it but I couldn’t find the info. Wiki just had an article on AT devices and Google came up with nothing about speed limits on 40 wire cables, rather odd I must say.