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A SO-DIMM slot on a computer motherboard. A SO-DIMM (pronounced "so-dimm" / ˈ s oʊ d ɪ m /, also spelled "SODIMM") or small outline DIMM, is a smaller alternative to a DIMM, being roughly half the physical size of a regular DIMM. The first SODIMMs had 72 pins and were introduced by JEDEC in 1997.
DDR SDRAM for notebook computers, SO-DIMMs, have 200 pins, which is the same number of pins as DDR2 SO-DIMMs. These two specifications are notched very similarly and care must be taken during insertion if unsure of a correct match.
Small outline RIMM (SO-RIMM). Smaller version of the RIMM, used in laptops. Technically SO-DIMMs but called SO-RIMMs due to their proprietary slot. Compression Attached Memory Module , a standard developed by Dell, which uses a land grid array instead of the more common edge connector. Stacked vis-à-vis non-stacked RAM modules
Systems with CAMM memory already installed cannot be expanded through adding additional CAMM modules in the same way that 2 DIMMs can be added alongside 2 existing DIMMs to expand total system memory. Instead, the entire CAMM module must be replaced with one with a higher capacity. So CAMM may be of benefit for laptops and ITX systems.
For general computer use, the 2.5-inch form factor (typically found in laptops and used for most SATA SSDs) is the most popular, in three thicknesses [98] (7.0mm, 9.5mm, 14.8 or 15.0mm; with 12.0mm also available for some models). For desktop computers with 3.5-inch hard disk drive slots, a simple adapter plate can be used to make such a drive fit.
ATI has since designed the GDDR technology further into GDDR3, which is based on DDR2 SDRAM, though with several additions suited for graphics cards. GDDR3 was commonly used in graphics cards and some tablet PCs. However, further confusion has been added to the mix with the appearance of budget and mid-range graphics cards which claim to use ...
Modern DIMMs include a Serial Presence Detect (SPD) ROM chip that contains recommended memory timings for automatic configuration as well as XMP/EXPO profiles of faster timing information (and higher voltages) to allow for a performance boost via overclocking. The BIOS on a PC may allow the user to manually make timing adjustments in an effort ...
Registered memory (also called buffered memory) is computer memory that has a register between the DRAM modules and the system's memory controller. A registered memory module places less electrical load on a memory controller than an unregistered one.