DDR2 内存模块
与DDR相比，DDR2将数据传输速率提高了2倍。它在PCB上有240个引脚（每侧120个）。消费为1.8V。时钟频率从400 MHz到800 MHz不等。 DDR2存储器的最大频率为1000 MHz。
№
Memory name
Latency (ns)
Read (MB/s)
Write (MB/s)
Price
1981
59
3,969.7
1,771.1
NA
1982
62
3,897.7
2,014.3
NA
1983
66
2,913.4
1,352.6
NA
1984
64
2,741.7
1,687.0
NA
1985
99
1,832.2
1,022.6
NA
1986
53
4,277.0
1,408.5
NA
1987
56
3,481.4
1,325.7
NA
1988
67
3,166.0
1,376.4
NA
1989
60
3,766.1
1,679.8
NA
1990
69
4,184.6
1,715.5
NA
1991
76
2,010.7
1,137.8
NA
1992
76
3,648.3
1,680.8
NA
1994
66
3,816.4
1,789.9
NA
1995
78
3,671.2
2,373.1
NA
1996
87
3,588.6
1,835.2
NA
1997
55
4,098.0
1,622.4
NA
1998
83
3,628.7
2,544.8
NA
1999
81
1,960.6
1,160.4
NA
2000
60
3,720.6
1,539.4
NA
Ramaxel Technology RML1520EC48D7W-800 1GB