Mac Pro 4,1 2009 6GB (3x 2GB) PC3-8500 Kingston Memory Kit RAM A1289

Description Mac Pro 4,1 2009 6GB (3x 2GB) PC3-8500  Kingston Memory Kit RAM A1289 1066MHz DDR3 ECC SDRAM (Non Registered) Note: You can not mix Registered and NON Registered memory in the Mac Pro. You either have one type or the other. Compatible with Mac Pro (Early 2009) 4,1 A1289 Part numbe- KTA-MP1066K3/6G