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  2. DIMM - Wikipedia

    en.wikipedia.org/wiki/DIMM

    Assorted SO-DIMM Modules A 200-pin PC2-5300 DDR2 SO-DIMM. A 204-pin PC3-10600 DDR3 SO-DIMM. A SO-DIMM slot on a computer motherboard. A SO-DIMM (pronounced "so dim" / 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 SO-DIMMs had ...

  3. Registered memory - Wikipedia

    en.wikipedia.org/wiki/Registered_memory

    Registered (Buffered) DIMM (R-DIMM or RDIMM) modules insert a buffer between the pins of the command and address buses on the DIMM and the memory chips. A high-capacity DIMM might have numerous memory chips, each of which must receive the memory address, and their combined input capacitance limits the speed at which the memory bus can operate.

  4. Memory module - Wikipedia

    en.wikipedia.org/wiki/Memory_module

    Two types of DIMMs (dual in-line memory modules): a 168-pin SDRAM module (top) and a 184-pin DDR SDRAM module (bottom). Memory modules of SK Hynix. In computing, a memory module or RAM stick is a printed circuit board on which memory integrated circuits are mounted.

  5. Multi-channel memory architecture - Wikipedia

    en.wikipedia.org/wiki/Multi-channel_memory...

    Dual-channel memory slots, color-coded orange and yellow for this particular motherboard. Dual-channel-enabled memory controllers in a PC system architecture use two 64-bit data channels. Dual-channel should not be confused with double data rate (DDR), in which data exchange happens twice per DRAM clock. The two technologies are independent of ...

  6. Fully Buffered DIMM - Wikipedia

    en.wikipedia.org/wiki/Fully_Buffered_DIMM

    A Fully Buffered DIMM (FB-DIMM) is a type of memory module used in computer systems. It is designed to improve memory performance and capacity by allowing multiple memory modules to be each connected to the memory controller using a serial interface, rather than a parallel one.

  7. UniDIMM - Wikipedia

    en.wikipedia.org/wiki/UniDIMM

    UniDIMM (short for Universal DIMM) is a specification for dual in-line memory modules (DIMMs), which are printed circuit boards (PCBs) designed to carry dynamic random-access memory (DRAM) chips. UniDIMMs can be populated with either DDR3 or DDR4 chips, with no support for any additional memory control logic; as a result, the computer's memory ...

  8. Serial presence detect - Wikipedia

    en.wikipedia.org/wiki/Serial_presence_detect

    In computing, serial presence detect (SPD) is a standardized way to automatically access information about a memory module.Earlier 72-pin SIMMs included five pins that provided five bits of parallel presence detect (PPD) data, but the 168-pin DIMM standard changed to a serial presence detect to encode more information.

  9. DDR2 SDRAM - Wikipedia

    en.wikipedia.org/wiki/DDR2_SDRAM

    PC2-5300 DDR2 SO-DIMM (for notebooks) Comparison of memory modules for desktop PCs (DIMM) Comparison of memory modules for portable/mobile PCs (SO-DIMM) The key difference between DDR2 and DDR SDRAM is the increase in prefetch length. In DDR SDRAM, the prefetch length is two bits for every bit in a word; whereas it is four bits in DDR2 SDRAM.