Axiom 16GB DDR2-667 ECC RDIMM Kit (2 x 8GB) for Sun # X5290A-Z - 16GB (1 x 16GB) - 667MHz DDR2-667/PC2-5300 - ECC - DDR2 SDRAM - 240-pin DIMM

667 MHz of memory speed with Registered signal makes your computer perform like an athlete RDIMM 16 GB bar will run multiple applications together and enhance your computers performance 240-pin-pin DDR2-667 interface multiplexes 2-bit data from memory cell and I/O buses to minimize processor idle time and enhance your computers performance