RAM DDR1, DDR2, DDR3 dan definisinya

Posted: Juli 10, 2011 in hardware, informasi IT

Sobat, kadang kita bingung membedakan Ram DDR1, DDR2 dan DDR3. Gimana sih sistem perhitungan clocknya, kelas-kelasnya bagaimana….

Nah bagi sobat-sobat yang masih bingung dengan DDR dan clocknya, berikut ini saya tampilkan tabel clock dan transfer ratenya. Semoga bermanfaat

Ringkasannya:
DDR1:
DDR-200 = PC-1600
DDR-266 = PC-2100
DDR-333 = PC-2700
DDR-400 = PC-3200

DDR2:
DDR2-400 = PC2-3200
DDR2-533 = PC2-4200
DDR2-667 = PC2-5300
DDR2-800 = PC2-6400
DDR2-1066= PC2-8500

DDR3:
DDR3-800 = PC3-6400
DDR3-1066 = PC3-8500
DDR3-1333 = PC3-10600
DDR3-1600 = PC3-12800
DDR3-1866 = PC3-14900
DDR3-2133 = PC3-17000

tabel detailnya adalah sebagai berikut ini:

DDR1:

Standard name Memory clock(MHz) Cycle time[4](ns) I/O bus clock(MHz) Data rate(MT/s) VDDQ(V) Module name Peak transfer rate(MB/s) Timings(CL-tRCD-tRP)
DDR-200 100 10 100 200 2.5±0.2 PC-1600 1600
DDR-266 133? 7.5 133? 266? PC-2100 2133?
DDR-333 166? 6 166? 333? PC-2700 2666?
DDR-400A
DDR-400B
DDR-400C
200 5 200 400 2.6±0.1 PC-3200 3200 2.5-3-3
3-3-3
3-4-4

DDR2:

Standard name Memory clock(MHz) Cycle time(ns) I/O bus clock(MHz) Data rate(MT/s) Module name Peak transfer rate(MB/s) Timings[2][3](CL-tRCD-tRP) CAS latency(ns)
DDR2-400B
DDR2-400C
100 10 200 400 PC2-3200 3200 3-3-3
4-4-4
15
20
DDR2-533B
DDR2-533C
133? 266? 533? PC2-4200* 4266? 3-3-3
4-4-4
11¼
15
DDR2-667C
DDR2-667D
166? 6 333? 666? PC2-5300* 5333? 4-4-4
5-5-5
12
15
DDR2-800C
DDR2-800D
DDR2-800E
200 5 400 800 PC2-6400 6400 4-4-4
5-5-5
6-6-6
10
12½
15
DDR2-1066E
DDR2-1066F
266? 533? 1066? PC2-8500* 8533? 6-6-6
7-7-7
11¼
13?

DDR3:

Standard name Memory clock(MHz) Cycle time(ns) I/O bus clock(MHz) Data rate(MT/s) Module name Peak transfer rate(MB/s) Timings(CL-tRCD-tRP) CAS latency(ns)
DDR3-800D
DDR3-800E
100 10 400 800 PC3-6400 6400 5-5-5
6-6-6
12 1?2
15
DDR3-1066E
DDR3-1066F
DDR3-1066G
133? 7 1?2 533? 1066? PC3-8500 8533? 6-6-6
7-7-7
8-8-8
11 1?4
13 1?8
15
DDR3-1333F*
DDR3-1333G
DDR3-1333H
DDR3-1333J*
166? 6 666? 1333? PC3-10600 10666? 7-7-7
8-8-8
9-9-9
10-10-10
10 1?2
12
13 1?2
15
DDR3-1600G*
DDR3-1600H
DDR3-1600J
DDR3-1600K
200 5 800 1600 PC3-12800 12800 8-8-8
9-9-9
10-10-10
11-11-11
10
11 1?4
12 1?2
13 3?4
DDR3-1866J*
DDR3-1866K
DDR3-1866L
DDR3-1866M*
233? 4 2?7 933? 1866? PC3-14900 14933? 10-10-10
11-11-11
12-12-12
13-13-13
10 5?7
11 11?14
12 6?7
13 13?14
DDR3-2133K*
DDR3-2133L
DDR3-2133M
DDR3-2133N*
266? 3 3?4 1066? 2133? PC3-17000 17066? 11-11-11
12-12-12
13-13-13
14-14-14
10 5?16
11 1?4
12 3?16
13 1?8

* optional

CL – Clock cycles between sending a column address to the memory and the beginning of the data in response

tRCD – Clock cycles between row activate and reads/writes

tRP – Clock cycles between row precharge and activate

Fractional frequencies are normally rounded down, but rounding up to -667 is common due to superstition about the number 666.

……DDR3 SDRAM:….Double Data Rate SDRAM III (Quad Edge ‘Clock’ Rate, 1.5v signaling), Third Generation
………PC3-6400 (DDR3-800 SDRAM); Clock Speed: 100MHz, Data Rate: 800MHz, Through-put 6.40GB/s
………PC3-8500 (DDR3-1066 SDRAM); Clock Speed: 133MHz, Data Rate: 1066MHz, Through-put 8.53GB/s
………PC3-10600 (DDR3-1333 SDRAM); Clock Speed: 166MHz, Data Rate: 1333MHz, Through-put 10.67GB/s
………PC3-12800 (DDR3-1600 SDRAM); Clock Speed: 200MHz, Data Rate: 1600MHz, Through-put 12.80GB/s

source:

http://en.wikipedia.org/wiki/DDR1_SDRAM

http://en.wikipedia.org/wiki/DDR2_SDRAM

http://en.wikipedia.org/wiki/Ddr3

http://www.interfacebus.com/Memory_Module_DDR3_DIMM.html

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