Sorry but what did you think the BIOS update would do? They stated loud and clear that it increases the fan curve (and nothing else), so of course the Fans will be louder if they spin faster.
I'm going with the Thermal Pad mod INSTEAD because i don't want that kind of noise and i tested myself where my threshold of "acceptable noise" is for this GPU... and 2000 RPM is as high as i think is acceptable without getting into Jet Engine territory.
All you can do now to get the card silent again is to do a custom fan curve in MSI Afterburner or EVGA Precision X.
And do the Thermal Pad Mod yourself, it really isn't hard, GamerNexus has a good video up on their Youtube how to install it.
-> youtube.com/watch?v=8DQYP0SN_Kk
//edit sorry, forum keeps eating my links
...unless you can find the original BIOS somewhere and flash it back, i don't know where you would get that, maybe it is somewhere on the EVGA site, i don't know.