Please recommend a good Mac Video Card for Phocus

[lumen]

I have 2009 Mac Pro that came with NVIDIA GeForce GT 120 video card. I hear Phocus is very dependent on faster video card?
If true what card would you recommend?

Thanks!

[SteveK]

Not sure how it works on a Mac but for Windows it works fine. I use Phocus on different PCs and on different cards - even on a "cheap" notebook it works fine for tethered captures.

[Dustbak]

The GT120 is not ideal. Yes, it works (I have had it in my MP2009 as well) I can however recommend getting the 5770 which will make your experience with Phocus much nicer. The 5870 even more but I found the 5770 the sweet spot in price vs. performance.

[lumen]

Thanks for all the responses.
I decided to get the Radeon 5770 and also added an OWC 240GB SSD HD.