Intel Eyeing to 2 GHz+ DDR3

while some memory manufacturers have already released DDR3 modules clocked at 1.8 GHz, Intel is currently working with JEDEC to increase RAM frequency even higher with 1866 MHz and 2133 MHz DDR3 modules. Santa Clara's giant wants also to enable such speed-bins via its extreme memory profile (XMP) technology:

“We are working on adding a few more speed bins to JEDEC’s standard DDR3’s definition – specifically like 1866MHz and 2133MHz – even though these speed bins will first be covered by the XMP spec,” said Christopher Cox, senior staff engineer for Intel’s platform memory operation

DDR3 is planed to replace current DDR2 in next generation Intel platform, providing larger bandwidth and lower power consumption (1.5V vs. 1.8V for the DDR2). This is to reduce the resulting higher latency that Intel wants to increase DDR3 frequencies, as well as DDR3 overclocking feature via XMP.
First hardware model to feature DDR3 should arrive mid 2008, while XMP should be already implemented in motherboard, it will only work with modules supporting such technology.