Axiom 64GB DDR2-667 ECC RDIMM Kit (8 x 8GB) for Sun # SUNM5000/64-AX - 64 GB (8 x 8 GB) - DDR2 SDRAM - 667 MHz DDR2-667/PC2-5300 - ECC - Registered - DIMM

Up to 667 MHz speed is enough to run heavy software smoothly while surfing web with dozens of tabs open 64 GB of memory can produce approx. 10K MIPS and as a result, your system gets more room to run complex apps. DDR2-667 interface multiplexes 2-bit data from memory cell and I/O buses to minimize processor idle time and enhance your computers performance