Installing the Motherboard 2-15
User’s Manual
IDE3 and IDE4: ATA 66/Connectors
The BE6 supports the Ultra ATA/66 (Also
known as Ultra DMA/66) specification. It
enhances existing Ultra ATA/33 technology
by increasing both performance and data
integrity. This new high-speed interface
doubles the Ultra ATA/33 burst data transfer
rate to 66.6 Mbytes/sec. The result is
maximum disc performance using the
current PCI local bus environment. Figure
2-8 shows you the different between the Ultra ATA/33 and Ultra ATA/66 Conductor Cable.
NOTE
HPT 366 IDE controller is designed to support high-speed mass storage. Thus we don’t
suggest you connect non-disk devices that use ATA/ATAPI interfaces, such as CD-ROM
to HPT 366 IDE connector (IDE3&IDE4).
Figure 2-8. The difference between Ultra ATA/33 and Ultra ATA/66 Conductor Cables
Figure 2-9 shows you a photo of an Ultra ATA/66 Conductor Cable. An Ultra ATA/66-
capable cable is a 40-pin, 80-conductor cable with a black connector on one end, a blue
connector on the other end and a gray connector in the middle. In addition, line 34 on the
cable should be notched or cut (this may be difficult to see).
Ultra ATA/66 is backwards compatible with all Ultra ATA/33 systems, but it will be limited
in its transfer mode to the Ultra ATA/33 (Ultra DMA Mode 2 - 33 Mbytes/sec) or PIO Mode
4 (16.6 Mbytes/sec). Ultra ATA/66 hard drives are 100 percent backward compatible with
both Ultra ATA/33 and DMA and with existing ATA (IDE) hard drives, CD-ROM drives,
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