40 or 80 pin IDE cables for my HDD and CD drives?

Epsil0n00

Golden Member
Aug 29, 2001
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So, what's the diff. between 40 and 80 pin IDE cables and which ones should I use for my HDD and CD-RW/DVD drives?

Also, there's a big controversy whether round IDE cables are reliable or not... what do you think?

Thanks for the info!
Epsil0n :D
 

Pariah

Elite Member
Apr 16, 2000
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All IDE cables are 40pin. UDMA cables are 80wire. The additional 40 wires are ground wires which help to keep the signal cleaner. You should always use 80 wire cables if you have an UDMA controller regardless of what's attached to it.
 

VBboy

Diamond Member
Nov 12, 2000
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Using a 40-wire (ATA-33) cable with an ATA-66 or newer HD/controller is very likely to cause data corruption.

Note that CD-ROM drives do not require anything better than a good old 40-wire ATA-33 cable. As for hard drives, I agree with Pariah.
 

Epsil0n00

Golden Member
Aug 29, 2001
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DO most new mobo's with the KT266A chipset on them have UDMA controllers that would require the use of 80 pin cables? I am going to be using an Abit KR7-RAID or an MSI K7T266 PROA RAID with an IBM 60GXP deskstar HDD. What do I need for this setup? THanks again!

Epsil-n
 

JohnnyPC

Senior member
Sep 25, 2001
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<< Using a 40-wire (ATA-33) cable with an ATA-66 or newer HD/controller is very likely to cause data corruption. >>



Using a 40 wire on a ATA66 or greater controller will cause the controller to default to no faster than ATA33...depending on your controller and it bios, you even get an error message to this effect...
 

Jiggz

Diamond Member
Mar 10, 2001
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Using a 40 or 80 wire cable depends on the unit your connecting. For HDD ATA-66/100 use the 80 wire cable. For CD-Rom, DVD and CD-RW use the standard 40 wire cables. Would it hurt if you decided to use the 80 wire on a CD-Rom, CD-RW or DVD? Nope.
 

bacillus

Lifer
Jan 6, 2001
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<< Would it hurt if you decided to use the 80 wire on a CD-Rom, CD-RW or DVD? Nope. >>


I use an ata100 cable withe all my ide devices regardless of whether they're ata33/66/100!
 

corkyg

Elite Member | Peripherals
Super Moderator
Mar 4, 2000
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One other point to keep in mind . . . UDMA 80-wire cables are also Cable Select capable, and you can set the device jumpers to CS and the connector will determine Master or Slave automatically. Gray is Slave and black is Master. Blue goes in the controller socket.

40 wire cables have to be specially modified in order for them to use CSel. I still use them because when I use 80 wire cables, I lose my desktop animations. There is never any data loss.

 

redhatlinux

Senior member
Oct 6, 2001
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Forget the old 40 wire cables, use 80 wire for everything. Even on slower devices, the signals are cleaner due to the extra ground wires. As posted earlier, you should experience no data loss with 40 wire cables, just slower data transfer.
 

4824guy

Diamond Member
Oct 9, 1999
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If possible, use 80 conductors cables . They are shielded better so they provide a cleaner digital data transmission.