So I got a brand new 15" MBP for Christmas
2.4 i7, 1 GB HD 6770, 8gb Ram, etc
DISCLAIMER: THIS IS MY OWN PERSONAL EXPERIENCE AND I AM SIMPLY REPORTING THAT. IF YOU CHOOSE TO OVERCLOCK YOUR CARD/SYSTEM YOU, AS A HUMAN BEING, ARE RESPONSIBLE FOR YOUR OWN DECISIONS. DON'T BLAME ME.
With that out of the way..
First things first, the frame rates some of you are getting are completely unacceptable and you should be extremely angry at Apple and Bioware.
Here are the things that I've done, and I'm getting 60fps at 1440x900 resolution. In fact, I'm getting 1800 3dmarks, which is incredible.
First off, installed Boot Camp, obviously.
Then, I immediately replaced the ATI drivers with the ones from here - These are the 64bit Windows 7 drivers, first link is to the download page, second link is a direct link to the drivers:
http://sites.amd.com/us/game/downloads/pages/radeon_win7-64.aspx
http://www2.ati.com/drivers/11-12_vista64_win7_64_dd_ccc_ocl.exe
They installed fine and replaced the horrible boot camp drivers.
Next I downloaded ATI Tray Tools. I suggest googling for it, but it is a program that gives you access to a number of options for your card that aren't otherwise enabled, including overclocking. I'm not sure why Apple ships the 6770 underclocked, but it is unnecessary and really hampers performance.
Doing a bit of googling, I discovered that most people have success and stability with their clocks set at 860/1050.
I also locked the Anti-Aliasing at 4x and the Anistropic Filtering at 8x, both set to performance over quality.
In game graphics settings are all maxed, including shaders and bloom, with one exception, and that is shadows set to low.
Doing all of this gives me a solid 60fps indoors and out regardless of population. If I turn shadows to High it drops my framerate to the high 30's, which is completely unacceptable, again, we should all be angry at Bioware and Apple. I shouldn't take a 40% performance hit because shadows are turned up.
Anyway, this is what I've done and the game looks and plays beautifully, hopefully this helps those of you with ATI cards out a bit. Please do ample research before making the decision to overclock any part of your system. You own a ~$2000 computer, don't melt it because you couldn't spend an hour educating yourself on google. If you do, don't get if you respond here and I laugh at you.