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    • DDR4 Memory

    Arch Computer LLC & Arch Memory are a Women-Owned Small Business and a Registered Small Business. 

    DDR4 is not compatible with any earlier type of random-access memory (RAM) due to different signaling voltage and physical interface, besides other factors.

    DDR4 operates at a voltage of 1.2 V with a frequency between 800 and 1600 MHz (DDR4-1600 through DDR4-3200), compared to frequencies between 400 and 1067 MHz (DDR3-800 through DDR3-2133) and voltage requirements of 1.5 V of DDR3. Due to the nature of DDR, speeds are typically advertised as doubles of these numbers (DDR3-1600 and DDR4-2400 are common, with DDR4-3200, DDR4-4800 and DDR4-5000 available at high cost).

    DDR4 memory is supplied in 288-pin dual in-line memory modules (DIMMs), similar in size to 240-pin DDR3 DIMMs. The pins are spaced more closely to fit the increased number within the same 5¼ inch (133.35 mm) standard DIMM length, but the height is increased slightly to make signal routing easier, and the thickness is also increased to accommodate more signal layers. DDR4 DIMM modules have a slightly curved edge connector so not all of the pins are engaged at the same time during module insertion, lowering the insertion force.

    DDR4 SO-DIMMs have 260 pins instead of the 204 pins of DDR3 SO-DIMMs, spaced at 0.5 rather than 0.6 mm, and are 2.0 mm wider,  but remain the same 30 mm in height.

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