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
641
55
4,596.2
2,019.9
NA
642
65
4,089.5
1,955.9
NA
643
90
2,699.0
1,140.4
NA
644
56
3,951.2
1,446.3
NA
645
55
4,583.8
2,166.5
NA
646
50
5,252.5
2,053.9
NA
647
62
4,300.5
1,814.3
NA
648
50
5,168.7
2,212.7
NA
649
57
4,671.5
2,312.6
NA
650
53
4,826.9
1,909.8
NA
651
57
2,767.1
2,140.5
NA
652
102
3,530.5
2,074.6
NA
653
118
3,100.8
2,137.1
NA
654
57
3,233.2
2,179.8
NA
655
111
2,276.2
1,038.7
NA
656
53
3,895.3
1,775.3
NA
657
102
2,937.8
1,921.8
NA
658
51
3,407.3
2,630.3
NA
659
91
3,019.9
2,038.2
NA
660
72
3,153.0
1,497.5
NA
Hynix Semiconductor (Hyundai Electronics) HMP112U6