OC Workbench have some news (a press release actually) posted on their website about Samsung's new DDR-II technologies.

Samsung's 512Mb DDR-II SDRAM fully satisfies the JEDEC DDR-II standard set in March 2002. The device has a low 1.8-volt Vdd and has data transfer rates of 533Mbps that can be extended to a maximum of 667Mbps for networks and special system environments. With the availability of Samsung's new 512Mb DDR-II SDRAM device, high-speed, performance-enhanced, next-generation memory designs are now a reality.