I am getting 8057's with the 680. But look at this:
http://foldingforum.org/viewtopic.php?f=66&t=22808&p=227309&hilit=8057+fermi#p227355
This guy is running 460's:
"I have all 5 of my GTX 460's continuously running these p8057's. No card has received anything else since I got the first one. They have all run smooth as silk with no errors at all.
As far as I can tell my secret sauce:
v7.2.9 client
v2.22 FAHCore_15.exe
GTX 460 (I suspect any fermi card)
client-type = beta
The only other settings I am using: next-unit-percentage = 100 and I have an extra core setting of -verbose (But I really do not believe either of these matters in getting a WU)"
Doesn't that mean that with V7.2.9 one can get lucky and get attached to the server dispensing 8057's?