DRAM Modules DDR3/3L DDR3/3L Micro1.5V / 1.35VMicro-DIMM21454.0mm30.0mmUnbufferedx64MO-260DDR3/3L Mini1.5V / 1.35VMini-DIMM24482.0mm30.0mmUnbuffered or registeredx64/x72MO-244DDR3/3L SO1.5V / 1.35VSODIMM20467.6mm30.0mmUnbufferedx64MO-268DDR3/3L SO ECC1.5V / 1.35VSODIMM ECC20467.6mm30.0mmUnbuffered or registeredx72MO-268DDR3/3L DIMM1.5V / 1.35VStandard240 5.25" (133.35mm)30.0mmUnbuffered or registeredx64/x72MO-269 DDR2 DDR2 FB1.8VStandard2405.25" (133.35mm)30.0mmFully bufferedFBMO-256DDR2 Mini1.8VMini-DIMM24482.0mm30.0mmRegisteredx72MO-244DDR2 SO1.8VSODIMM20067.6mm30.0mmUnbufferedx64MO-224DDR2 DIMM1.8VStandard2405.25" (133.35mm)30.0mmUnbuffered or registeredx64/x72MO-237 DDR1 DDR1 SO2.5VSODIMM20067.6mm30.0mmUnbufferedx64/x72MO-224DDR1 DIMM2.5VStandard1845.25" (133.35mm)1.2" (30.48mm)Unbuffered or registeredx64/x72MO-206 SDR SDR DIMM3.3VStandard1685.25" (133.35mm)1.0" to 1.7" (25.4 to 43.18mm)Unbuffered or registeredx64/x72MO-161SDR SO3.3VSODIMM14467.6mm30.0mmUnbuffered or registeredx64/x72MO-190