Transcend JM2666HLB-8G, U-DIMM, Frequency 2666, CL19, 8 GB, Rank 1Rx8, 1.2V, PCB 1.23 inches, 288 pin. Transcend's JetRam memory modules are manufactured with true ETT grade, brand-name DRAM chips that have passed Transcend's strict screening process and rigorous environmental testing. The modules provide excellent compatibility and fully-tested reliability,