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A 16GB [1] DDR4 SO-DIMM module by Micron. DDR4 memory is supplied in 288-pin dual in-line memory modules (DIMMs), similar in size to 240-pin DDR3 DIMMs. DDR4 RAM modules feature pins that are spaced more closely at 0.85 mm compared to the 1.0 mm spacing in DDR3, allowing for a higher pin density within the same standard DIMM length of 133.35 mm ...
The DDR4 SDRAM is a high-speed dynamic random-access memory internally configured as 16 banks, 4 bank groups with 4 banks for each bank group for ×4/×8 and 8 banks, 2 bank groups with 4 banks for each bank group for ×16 DRAM. The DDR4 SDRAM uses an 8n prefetch architecture to achieve high-speed
DDR should not be confused with dual channel, in which each memory channel accesses two RAM modules simultaneously. The two technologies are independent of each other and many motherboards use both, by using DDR memory in a dual channel configuration. An alternative to double or quad pumping is to make the link self-clocking.
The table below shows values for PC memory module types. These modules usually combine multiple chips on one circuit board. SIMM modules connect to the computer via an 8-bit- or 32-bit-wide interface. RIMM modules used by RDRAM are 16-bit- or 32-bit-wide. [49] DIMM modules connect to the computer via a 64-bit-wide interface.
To access memory, a row must first be selected and loaded into the sense amplifiers. This row is then active, and columns may be accessed for read or write. The CAS latency is the delay between the time at which the column address and the column address strobe signal are presented to the memory module and the time at which the corresponding ...
1800–2400 800 HT 512 Socket 754: AMD64, NX Bit: 1000 HT Socket 939: 90 Winchester 1800–2200 Socket 939: Venice 1800–2400 800 HT Socket 754: DDR2: MMX, 3DNow!+, SSE, SSE2, SSE3: 1000 HT Socket 939: San Diego 2200–2600 1024 Socket 939: Orleans 1800–2600 512 Socket AM2: AMD64, NX Bit, AMD-V: 65 Lima 2000–2800 90 Athlon 64 X2 ...
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