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, sobat

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:

Keterangan:
Std Nm= Standard Name
Mem Clk= Memory clock(MHz)
Cy Tm= Cycle time^[4](ns)
Bus Clk= I/O bus clock(MHz)
Dt Rt= Data rate(MT/s)
Volt= V_DDQ(V)
Mod Nm= Module name
PTR= Peak transfer rate(MB/s)
Tim= Timings
CAS Lat= CAS latency(ns)

DDR1:

DDR2:

DDR3:

* 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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