AddOn AM667D2DFB5/8G x8 HP 495604-B21 Compatible Factory Original 64GB (8x8GB) DDR2-667MHz Fully Buffered ECC Dual Rank 1.8V 240-pin CL5 FBDIMM - 100% compatible and guaranteed to work

667 MHz of memory speed with Fully Buffered signal makes your computer great at multitasking DIMM 64 GB of memory can produce approx. 10K MIPS and as a result, your system gets more room to run complex apps. 240-pin-pin DDR2 SDRAM interface multiplexes 2-bit data from memory cell and I/O buses to minimize processor idle time and enhance your computers performance