These are Kingston 8GB DDR3-1866 ECC Registered DIMMs (RDIMMs).• Manufacturer: Kingston
• Capacity / organization: 8GB 1Rx4 (single-rank, x4)
• Speed / standard: PC3-14900R-13-12-C2 (DDR3-1866 / PC3-14900)
• Type: Registered (RDIMM) with ECC
• Voltage: 1.5 V
• Form factor: 240-pin DIMM
• Kingston part number: KTD-PE318/8G
• Additional markings: BSMK1861414, CE mark, and a secondary sticker with assembly infoThe modules use Kingston-branded DRAM chips plus an Inphi register chip (typical for RDIMMs). Multiple identical blue sticks are stacked in the These are older-generation server/workstation DDR3 RDIMMs. They are not compatible with the previous DDR4 modules (or with standard consumer desktop/laptop motherboards that lack registered + ECC support). They were commonly used in systems such as certain Dell PowerEdge servers and Precision workstations from that era.Please know what you are buying. These are top-of-the-line RAM chips. No refunds for your mistakes or poor fitment.