A-Tech 24GB Kit (3x8GB) RAM for Apple Mac Pro Early 2009, Mid 2010, Mid 2012 (4-Core, 6-Core, 8-Core, 12-Core) | DDR3 1066MHz PC3-8500R ECC RDIMM 2Rx4 1.5V 240-Pin Registered DIMM Memory Upgrade

• 24 GB RAM Kit (3 x 8GB Modules). DDR3 DIMM 240-Pin. Speeds up to 1066/1067-MHz, PC3-8500/PC3-8500R ECC Registered RDIMM. 2Rx4 (Dual Rank x4). JEDEC DDR3 standard 1.5V Compatible for the Apple Mac Pro Early 2009, Mid 2010, Mid 2012 (MacPro4,1, MacPro5,1. A1289). Models: 4-Core, 6-Core, 8-Core, 12-Core Compatible for Mac Pro part numbers: MB871LL/A, MB535LL/A, MC250LL/A, MC560LL/A, MC561LL/A, MC915LL/A, MD770LL/A, MD772LL/A, MD771LL/A, BTO (Build-To-Order) Note: This memory is ECC RDIMM and can not be mixed with modules of a different ECC type such as ECC UDIMM, ECC LRDIMM, or Non-ECC UDIMM All A-Tech memory modules undergo stringent quality control testing to ensure dependable and reliable performance (Please refer to your system's manual for proper installation guidelines) Backed by A-Tech's Limited Lifetime Warranty and supported by our knowledgeable Tech Team available to help before and after your purchase