5770 & Games

Hey Guys

I just got through installing a 5770 in my MP 1,1 and I'm glad to finally be able to play some games with it. However, the framerates in Starcraft 2 are a bit low compared to the barefeats benchmark for my system ( http://www.barefeats.com/wst10g7.html). Is it necessary to do an SMC reset or any other configuration change after installing the 5770?

My system:
Mac Pro 1,1
Quad 2.66
5GB
10.6.4 Build 10F569
ATI 5770 HD

 

Yep. I also downloaded it from apple.com and re-installed it post 5770 just to be sure.