These are genuine Cisco UCS-MRX16G1RE5 part number Samsung manufactured RAM modules for UCS Servers. These will work in any brand server that is compatible with the memory spec and speed. These are guaranteed to work in compatible Cisco UCS servers as these are original Cisco sold modules. These are not just "Cisco compatible" variants.Pulled from new UCSC-C245-M8SX servers.The generic Samsung non Cisco OEM part number is M321R2GA3PB2-CCP to look up their spec. M321R2GA3PB2-CCPKC is the exact made for Cisco part numbers these have.UCS-MRX16G1RE5 is the Cisco part and ordering number.