" DDR3 has been out for a pretty long time already and even though a
majority of enthusiasts currently run systems that utilize DDR3, the
majority of systems are still running on DDR2. DDR2 is the mainstream
technology and has a price point to match. The KHX8500D2T1K2/4G kit
comes with brand new heat-spreaders and good performance for a 4GB
DDR2 kit. "