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A
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4
B
P
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5
3
3
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B
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3
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A
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This motherboard supports ATA66,
modes. The IDE bus is 16-bit, which means every transfer is two bytes.
capacity hard drives, the current Ultra ATA/100 interface causes a data bottleneck between the drive and the host computer.
To avoid this problem, hard disk manufactures have introduced the new Ultra ATA-133 interface technology.
traditional ATA/100, ATA/133 has up to 33 percent increase in interface speed with transfer rate of 133MB/s. ATA/133
performance is ideal for new operating systems, such as Window XP, that demand more storage space and faster data transfer
rates from more responsive computing experiences.
To make good use of this new technology and enjoy its best performance, we recommend you to pair your system with a hard
disk equipped with ATA/133 technology so that your system's need for speed on this motherboard can be satisfied.
Mode
Clock Period
PIO mode 0
30ns
PIO mode 1
30ns
PIO mode 2
30ns
PIO mode 3
30ns
PIO mode 4
30ns
DMA mode 0
30ns
DMA mode 1
30ns
DMA mode 2
30ns
ATA 66
30ns
ATA 100
20ns
ATA 133
15ns
t
e
d
t
e
d
ATA100
or
ATA133
IDE devices. Following table lists the transfer rate of IDE PIO and DMA
Clock Count
Cycle Time
20
600ns
13
383ns
8
240ns
6
180ns
4
120ns
16
480ns
5
150ns
4
120ns
2
60ns
2
40ns
2
30ns
As the hard drive industry introduces faster and higher
Data Transfer Rate
(1/600ns) x 2byte = 3.3MB/s
(1/383ns) x 2byte = 5.2MB/s
(1/240ns) x 2byte = 8.3MB/s
(1/180ns) x 2byte = 11.1MB/s
(1/120ns) x 2byte = 16.6MB/s
(1/480ns) x 2byte = 4.16MB/s
(1/150ns) x 2byte = 13.3MB/s
(1/120ns) x 2byte = 16.6MB/s
(1/60ns) x 2byte x2 = 66MB/s
(1/40ns) x 2byte x2 = 100MB/s
(1/30ns) x 2byte x2= 133MB/s
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