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The best-rated DDR2 memory modules are at least twice as fast as the best-rated DDR memory modules. The maximum capacity on commercially available DDR2 DIMMs is 8GB, but chipset support and availability for those DIMMs is sparse and more common 2GB per DIMM are used. [citation needed] [3]
A test with DDR and DDR2 RAM in 2005 found that average power consumption appeared to be of the order of 1–3 W per 512 MB module; this increases with clock rate and when in use rather than idling. [14] A manufacturer has produced calculators to estimate the power used by various types of RAM. [15]
A DIMM (Dual In-Line Memory Module) is a popular type of memory module used in computers. It is a printed circuit board with one or both sides (front and back) holding DRAM chips and pins . [ 1 ] The vast majority of DIMMs are manufactured in compliance with JEDEC memory standards , although there are proprietary DIMMs.
Low-Power Double Data Rate (LPDDR), also known as LPDDR SDRAM, is a type of synchronous dynamic random-access memory (SDRAM) that consumes less power than other random access memory designs and is thus targeted for mobile computing devices such as laptop computers and smartphones. Older variants are also known as Mobile DDR, and abbreviated as ...
Wider mode registers (DDR2 and up use 13 bits, A0–A12) Additional extended mode registers (selected by the bank address bits) DDR2 deletes the burst terminate command; DDR3 reassigns it as "ZQ calibration" DDR3 and DDR4 use A12 during read and write command to indicate "burst chop", half-length data transfer
DDR2, 2 4 GB MT 2007 HP dx2080 [6] Intel 945GZ Intel Core 2, Pentium D, Pentium 4 LGA 775 Intel GMA 950 No GPU slot DDR2, 2 4 GB MT 2006 HP dx2100 [7] Intel 915GV Intel Pentium 4 Intel GMA 900 No GPU slot DDR2, 4 4 GB MT 2005 HP dx2150 [8] ATI Radeon Xpress 200 AMD Athlon 64 X2, Athlon 64, Sempron: Socket 939 ATI Radeon Xpress 200 DDR, 4 4 GB ...