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
221
69
3,808.9
2,017.2
NA
222
64
1,246.8
1,195.7
NA
223
67
1,292.9
1,048.0
NA
224
76
2,240.4
1,511.7
NA
225
82
2,406.8
2,428.1
NA
226
50
4,613.8
2,068.4
NA
227
86
4,001.1
2,847.0
NA
229
65
1,297.5
1,039.0
NA
230
67
4,231.4
2,641.2
NA
231
50
4,947.1
2,294.8
NA
232
66
5,249.2
3,606.8
NA
233
48
4,585.8
1,944.9
NA
234
68
5,257.5
3,543.5
NA
235
69
5,097.9
3,399.7
NA
236
66
3,099.3
1,451.3
NA
237
92
2,032.4
1,220.6
NA
238
65
2,341.9
1,429.0
NA
239
56
2,704.0
1,764.3
NA
240
80
3,775.8
2,883.8
NA
ASint Technology B2YJUSG4FN1 2GB