PureOverclock posted a review on the Gainward BLISS 6800 GS graphics card with 512MB

Gainward's BLISS 6800 GS GLH is no reference board. Sure, the core headroom is still up to the gods, but the memory headroom will destroy the competition. I managed to clock the memory to 1480 MHz at its peak. Just try and do that on any other 6800 GS with 2.0ns memory, it just won't happen

Gainward BLISS 6800 GS Review