** What is Ballistix memory?** The Ballistix line is specifically built for performance enthusiasts who want to push the performance envelope without worrying about data loss or corruption, mysterious intermittent errors & display problems, or worse the dreaded BSOD! The Ballistix line of high-performance memory modules features advanced speed grades, low latencies, & integrated aluminum heat spreaders. ** What is a Ballistix DDR3 240-pin DIMM?** Ballistix 240-pin DIMMs are found in DDR3 memory. DDR3 the next generation of memory boasts an enhanced architecture allowing very fast data transmission. Ballistix 240-pin DIMMs are available in DDR3 PC3-12800 SDRAM (DDR3-1600). A Ballistix dual inline memory module (DIMM) consists of a number of memory components attached to a black printed circuit board. Gold pins, found on the bottom of the DIMM, provide a connection between the module & a socket on a larger printed circuit board. The pins on the front & back of a DIMM are not connected to each other. To use DDR3, your system motherboard must have 240-pin DIMM slots & a chipset that supports DDR3 which is a different technology than that of than its predecessors, DDR2 & DDR. DDR3 incorporates different sockets; they are not interchangeable or backward-compatible. (Information about which memory technology your system uses is included in the Crucial Memory Advisor tool.) The number of black components on a Ballistix 240-pin DIMM can vary, but it always has 120 pins on the front & 120 pins on the back, for a total of 240. Ballistix 240-pin DIMMs are Approx. 5.25 inches long & 1.18 inches high, though the heights can vary. These 240-pin DDR3 DIMMs have only one notch within the row of pins, & each technology has the notch in a slightly different location on the module.