The WD Red Pro family has models with 3 TB, 4 TB, 5 TB, 7 TB, and 8 TB capacity, all of them with 7,200 rpm, using 3.5” format, SATA-600 interface and 26.1 mm tall. The 8 TB, 6 TB, and 5 TB models have 128 MiB cache memory, while the 4 TB and 3 TB models have 64 Mib of cache RAM. hardwaresecrets.com
