I have read that registered memory was a crutch to quicken the pace of technology (more capacity/channels) at the time for the cost of performance and power consumption. My work station circa 2011 takes ECC 'E' (unbuffered at the time) and my server circa 2006 takes ECC 'F' or fully buffered, which then for a time was labeled 'R'. You usually cannot mix them, but sometimes enterprise server boards can accept both with 'R' usually allowing more installable memory capacity I think.įurther there was/is? a 'U' which is unbuffered non-ECC. 8GB DDR3 1600Mhz Unbuffered ECC (2rx8 PC3L-12800E-11-12-E3) - 25 + shiping 4GB DDR3 1600Mhz Non ECC, Desktop RAM - 7 + shipping. FOR SALE Samsung 8GB DDR3-1600 PC3L-12800E 2Rx8 unbuffered ECC Memory. They both are ECC, but they both are NOT registered. Weight (KG): 0.10 Brand: KINGSTON Capacity: 8GB Memory Type: PC3-12800E DDR: DDR3 Memory Speed: 1600MHz Rank: 2Rx8 Compatibility: Servers & workstations. PC3-12800E Lenovo 8GB PC3-12800 DDR3-1600MHz ECC Unbuffered CL11 240-Pin DIMM Dual Rank Memory Module. SAMSUNG 8GB DDR3-1600 PC3L-12800E 2Rx8 unbuffered ECC Memory B - 43.13. To extrapolate, the 'E' memory does not have the additional registers and is unbuffered. (SUPER DISCOUNT) US 41. Sometimes registered memory is called buffered memory. Your MacBook was designed for PC3-10600 DDR3 SDRAM, its best to stick with what Apple expects. As pointed out in the comments, the 'R' memory is registered which 'means it has additional buffers'.

Kingston 8gb 2rx8 pc3-12800e-11-12-e3