Beyond3D has posted a preview on the GeForce FX 5700 Ultra with GDDR3 memory

Another big facet of GDDR3 is the addition of on-die termination. This helps the RAM to reach higher clock speeds as well as benefiting board manufacturers, as the fact that they no longer need to worry about termination resistor packs and other power supply circuitry relating to the RAM can save them reduce the component count and as a result both complexity of the board and cost.

Read more