include DDR3L‐800 (PC3L-6400), DDR3L‐1066 (PC3L-8500), DDR3L‐1333 (PC3L-10600), and DDR3L‐1600 (PC3L-12800). Memory specified to DDR3L and DDR3U specifications is compatible with the original DDR3 standard, and can run at either the lower voltage or at 1.50 V. However, devices that require DDR3L explicitly, which operate at 1.35 V, such as systems using mobile versions of fourth-generation Intel Core processors, are not compatible with 1.50 V DDR3 memory. DDR3L is different from and incompatible with the LPDDR3 mobile memory standard. The DDR3U (DDR3 Ultra Low Voltage) standard is 1.25 V and has the label PC3U for its modules. JEDEC Solid State Technology Association announced the publication of JEDEC DDR3L on July 26, 2010 and the DDR3U in October 2011. Feature summary Components Introduction of asynchronous RESET pin Support of system-level flight-time compensation On-DIMM mirror-friendly DRAM pinout Introduction of CWL (CAS write latency) per clock bin On-die I/O calibration engine READ and WRITE calibration Dynamic ODT (On-Die-Termination) feature allows different termination values for Reads and Writes Modules Fly-by command/address/control bus with on-DIMM termination High-precision calibration resistors Are not backwards compatible—DDR3 modules do not fit into DDR2 sockets; forcing them can damage the DIMM and/or the motherboard Technological advantages over DDR2 Higher bandwidth performance, up to 2133 MT/s standardized Slightly improved latencies, as measured in nanoseconds Higher performance at low power (longer battery life in laptops) Enhanced low-power features See also List of interface bit rates Low power DDR3 SDRAM (LPDDR3) Multi-channel memory architecture Notes References External links JEDEC standard No. 79-3 (JESD79-3: DDR3 SDRAM) DDR3 SDRAM standard JESD79-3F Addendum No. 1 to JESD79-3 - 1.35 V DDR3L-800, DDR3L-1066, DDR3L-1333, DDR3L-1600, and DDR3L-1866 (JESD79-3-1A.01) Addendum No. 2 to JESD79-3 - 1.25 V DDR3U-800, DDR3U-1066, DDR3U-1333, and DDR3U-1600 Addendum No. 3 to JESD79-3 - 3D Stacked SDRAM SPD (Serial Presence Detect), from JEDEC standard No. 21-C (JESD21C: JEDEC configurations for solid state memories) SPD Annex K - Serial Presence Detect (SPD) for DDR3 SDRAM Modules (SPD4_01_02_11) DDR, DDR2, DDR3 memory slots testing DDR3 Synchronous DRAM Memory SDRAM de:DDR-SDRAM#DDR3-SDRAM fi:DRAM#DDR3 SDRAM