The Crucial Ballistix DDR3 PC3-12800 Memory offers excellent performance and it overclocks even higher than its 1600MHz default memory speed. DDR3 is the new memory standard and if you are upgrading it's an option over the older DDR2. Of course selecting DDR3 memory means you will require a motherboard that accepts it. The big advantage DDR3 has over DDR2 is it's much higher speed, but it doesn't have fast latencies like DDR2 and it's still very expensive.