My test card is this one:
http://www.inno3d.com/products_detail.php?refid=248The opensource does 245MHASH on the default clock wich is around 1830
In the latest mod I have increased that to 260 MHASH on the same clock, but then the card start to trottle and the speed decline. Normally overvolting / increase TDP will fix this, but the single 8 pin connector on the card is the bottleneck. The pascal kernel is still in development. New hardware, new possibilities.