Ata/133 supported – AOpen AK77-600N User Manual
Page 37
37
A
A
K
K
7
7
7
7
-
-
6
6
0
0
0
0
N
N
O
O
n
n
l
l
i
i
n
n
e
e
M
M
a
a
n
n
u
u
a
a
l
l
A
A
T
T
A
A
/
/
1
1
3
3
3
3
S
S
u
u
p
p
p
p
o
o
r
r
t
t
e
e
d
d
This motherboard supports
ATA66
,
ATA100
or
ATA133
IDE devices. Following table lists the transfer rate of IDE PIO and DMA
modes. The IDE bus is 16-bit, which means every transfer is two bytes. As the hard drive industry introduces faster and higher
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 manufacturers have introduced the new Ultra ATA-133 interface technology.
Compared to
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 speeding on this motherboard can be satisfied.
Mode
Clock Period
Clock Count Cycle Time
Data Transfer Rate
PIO mode 0
30ns
20
600ns
(1/600ns) x 2byte = 3.3MB/s
PIO mode 1
30ns
13
383ns
(1/383ns) x 2byte = 5.2MB/s
PIO mode 2
30ns
8
240ns
(1/240ns) x 2byte = 8.3MB/s
PIO mode 3
30ns
6
180ns
(1/180ns) x 2byte = 11.1MB/s
PIO mode 4
30ns
4
120ns
(1/120ns) x 2byte = 16.6MB/s
DMA mode 0
30ns
16
480ns
(1/480ns) x 2byte = 4.16MB/s
DMA mode 1
30ns
5
150ns
(1/150ns) x 2byte = 13.3MB/s
DMA mode 2
30ns
4
120ns
(1/120ns) x 2byte = 16.6MB/s
ATA33
30ns
4
120ns
(1/120ns) x 2byte x 2 = 33MB/s
ATA66
30ns
2
60ns
(1/60ns) x 2byte x 2 = 66MB/s
ATA100
20ns
2
40ns
(1/40ns) x 2byte x 2 = 100MB/s
ATA133
15ns
2
30ns
(1/30ns) x 2byte x 2 = 133MB/s