DDR
The abbreviation of DDR is Double Data Rate and it is a type of memory integrated circuit used in Central Processing Units (CPU) of the computers. The bandwidth of the double data rate (DDR) is twice that of the single data rate (SDR). The twice bandwidth is achieved by transferring data of the clock signal on the rising and falling edges and not making any changes in the clock frequency. The DDR SDRAM can give a maximum transfer rate of 1600 MB/s for a bus frequency of 100MHz.
JEDEC (Join Electron Device Engineering Council) solid state technology association has set some standards for the speed of the DDR SDRAM. The standards are divided into two parts, where the first part is for the memory chips specification and the second part is for memory module.
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 KINGSTON HYPER X 2X1G DDR DESKTOP MEMORY STICKS  US $41.00
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 KINGSTON 2X512MG DDR DESKTOP MEMORY KIT US $10.00
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 Kingston DDR 400 MHZ PC3200 2GB1GB x2 DUAL KIT Memory US $66.99
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 PNY US $10.00
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 Kingston PC2100 DDR 512MB DDR266 184pin PC 266 MEMORY US $15.99
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 NEW STT 512MB DDR 333 MHZ PC2700 Samsung chip memory US $17.99
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 NEW STT 512MB DDR 333 MHZ PC2700 Samsung chip memory US $17.99
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 3 Sticks of Corsair VS 512MB PC3200 US $18.00
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 CRUCIAL 512mb pc2700 333mhz cl25 184pin ddr CT6464Z335 US $26.99
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 CRUCIAL CT6464Z335 512mb pc2700 333mhz cl25 184pin ddr US $19.99
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 PC3200 1GB DDR SDRAM 1 GB PC 3200 400mhz 184 pin MEMORY US $15.99
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 HP 1GB 2x512MB PC2100 ECC REG 261584 041 Samsung US $15.00
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 1GB PC3200 DDR400 RAM 400MHZ 184PIN DESKTOP MEMORY DDR1 US $26.46
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 HP 1GB 1x1GB PC2100 ECCREG 261585 041 SIMPLETECH LB11 US $13.00
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 HP 2GB 2x1GB PC2100 ECC REG 351200 041 SimpleTech US $25.00
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 HP 2GB 2x1GB PC2100 ECC REG 261585 041 Smart Modular US $25.00
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 MICRON DELL MEMORY 128MB SYNCH 100MHZ CL2 PC100 222 620 US $4.11
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 512 memory ram for Dell Dimension 2350 DDR DDR 266 PC 2 US $15.00
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 MAJOR 1GB DDR 333MHZ DDR333 FOR VIA APPOLLO P4X400 US $30.00
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 MAJOR 1GB DDR 333MHZ 1 GB DDR333 FOR VIA PM800 US $30.00
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 MAJOR 1GB DDR 333MHZ 1 GB DDR333 FOR SIS 655 US $30.00
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 MAJOR 1GB DDR 333MHZ 1 GB DDR333 FOR VIA KT266 333 US $30.00
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 2GB RAM MEMORY DELL DIMENSION 1100 2400 3000 4600 8300 US $79.95
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 2GB Dell OPTIPLEX GX260 GX270 SX260 SX270 RAM Memory US $68.48
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 1GB PC2700 DDR DELL DIMENSION 2400 4600 8300 MEMORY RAM US $34.95
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 1GB PC2700 DDR IBM ThinkCentre COMPARE 2 KTM8854 1G US $34.95
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 Hynix 1GB 2x 512 MB PC3200 DDR 400 RAM US $15.97
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 1 PC 2100 DDR 256MB Ram and 1 256MB Micron PC2100 D US $7.99
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 KINGSTON 512 MB DDR DIMM PC3200 DDR400 400MHZ 512MB NEW US $22.00
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 Corsair XMS 2GB PC3200 kit PREMIUM NAME BRAND US $39.52
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 4GB Kit Memory RAM Apple Power Mac G5 Dual 18 GHz US $146.28
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 PC2100 256MB DDR RAM Memory for HP Compaq Evo Presario US $6.99
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 New Crucial 512MB DDR US $24.99
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 New Crucial 1024MB DDR US $49.99
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 1GB PC2700 DDR 333 1 GB PC 2700 PC2100 DESKTOP MEM RAM US $21.98
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 NEW 1GB DDR PC3200 1 GB PC 3200 400 MHz DESKTOP MEMORY US $21.97
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 2GB KIT 1GB x2 PC3200 PC 3200 PC2700 RAM DDR MEMORY US $43.95
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 1GB DDR PC3200 1 GB PC 3200 400 MHz 184 Pin Desktop RAM US $21.97
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 2GB 2 X 1GB PC3200 DDR 400 PC 3200 2700 2100 MEMORY RAM US $43.94
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 2GB PC4200 533Mhz 2 GB DDR2 DESKTOP RAM MEMORY NEW US $34.98
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 2GB STICK DDR2 PC4200 533Mhz PC2 4200 533 240Pin RAM 2G US $34.98
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 2GB PC4200 533Mhz DDR2 PC2 4200 240Pin RAM 2GB STICK US $34.98
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 2GB STICK PC2 4200 533Mhz DDR2 RAM PC2 4200 533 240Pin US $34.98
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 4GB 2X 2GB DDR2 PC2 4200 533MHZ 240 PIN DIMM 533 4 GB US $69.75
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 4GB 2X2GB PC4200 533MHz NEW DDR2 PC 2 DESKTOP MEMOR US $69.75
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 NEW 4GB 2X2GB PC4200 533MHz DDR2 PC 2 MEMORY DESKTOP US $69.75
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 2GB PC3200 DDR 2x 1GB PC 3200 400 Mh DESKTOP MEMORY KIT US $43.94
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 PC3200 512MB DDR SDRAM DDR400 184pin MEMORY 400Mhz RAM US $13.23
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 Lot of 5 pieces of Infineon 128MB RAM PC2700 US $.01
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 PAIR Infineon 512MB DDR PC2100 RAM SM5646485D8N6CHIBH US $5.51
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 1GB LOW DENSITY KINGSTON DDR 400 2X512 184 PIN 2 STICKS US $16.00
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 512MB Memory DDR266 PC2100R ECC REG HIGH PROFILE US $7.00
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 MAJOR 1GB DDR 333MHZ 1 GB DDR333 FOR KT 400A US $30.00
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 256MB DDR Dimm N 32WND Memory Stick 184pin 11942921 ud US $.99
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 512MB Memory RAM for Dell Dimension 4400 DDR DDR 333 US $17.50
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 1 GB 4x256mb PC3200 System Memory DDR 400 US $25.00
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 PC2700 256MB RAM DDR 333 Memory for Compaq Evo Presario US $7.99
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 1GB PC3200 2x 512MB DDR HP Media Compaq Presario Memory US $39.95
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 Micron 256mb pc2700 333mhz CL25 Desktop Memory US $.99
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 Samsung 512mb pc3200 333mhz Desktop Memory US $9.49
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