Where would I notice the performance boost?

Hello everyone,

I'm looking to upgrade my 12-core Mac Pro in the near future my main line of work is centered around adobe premiere pro, after effects and cinema 4d.

What do you guys think I would see an improvement in performance? Option 1, upgrading my current graphics card to a qaudro card or option 2, upgrading the processors to 3.33ghz?

Current set up:

12-core 2.4ghz (2.67 turbo)
40gb ram
512gb apple SSD
120gb scratch SSD
Ati 5770 graphics card

Thanks in advance!