Posted by the people of gpugrid.

So far, the performance of a GTX480 is only 30% faster than a GTX 285.
Fermi is completely different from a G200 chip, it's not just plug&play for a code optimized on the G200 as ACEMD.

We are trying to understand what's the problem. A factor two (100% faster) should be really the minimum for the hardware.

I'll keep you posted.
gdf