The Mushkin Standard Performance Series is the most economical solution for the standard, multi-use PC. The Mushkin Standard Performance module is good quality, spec'd to JEDEC standards for maximum compatibility, maintains exceptional performance, and is an overall great value!This 128Mx64 SP3200 module is an unbuffered 184-Pin Double Data Rate (DDR) Synchronous DRAM Dual In-Line Memory Module (DIMM), organized as a dual-bank high-speed memory array. 64Mx8 chip density. This DIMM achieves high-speed data transfer rates of up to 400MHz. Rated 3-3-3-8 at 400MHz.