Now am wondering why the new GPU has less (570 GFLOPS) than the 260..?

Wouldn't worry too much about that - my 465 has said everything between 570 gflops and 2000 gflops.
To get it to read right - use nvidia control panel (or any other OC tool) to check the default values it has given the card, correct them if they're wrong and restart Boinc - should then read the correct flops.
GPU-Z makes the default clock for my 465 @ 608Mhz - GPU clock, 802Mhz memory and 1215 shader

OOPS, my bad /rolleyes

The blond leading the blind.

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Man's future lies in the stars, not on Earth. It is each successive generation's responsibility to humanity to expand the knowledge and understanding of our Universe so that we may one day venture forth to meet our neighbors.

Houston, Texas

Uh oh...

http://setiathome.berkeley.edu/results.php?hostid=5050800&offset=0&show_names=0&state=5&appid=

Looks like the host is trashing all of the 6.09 work when it tries to run on the new FERMI card. Why has BOINC not downloaded the proper FERMI app to run with the new card? Will it only do that when it runs out of the 6.09 work?

The application which is supposed to do the work is chosen when the work is assigned. So yes, when a user running stock adds a Fermi card, 6.08 or 6.09 will be used on previously downloaded work. The first newly assigned task will cause 6.10 to be downloaded and used for all work delivered after that point.

It's a small cut which stops bleeding fairly quickly. The BOINC devs don't think it's worth the major surgery of putting smarts in the client code to distinguish subsets of GPUs of the same brand.

                                                                Joe