So I am thinking about getting another monitor, but I don't want to split the video RAM on my 5870. I also am not in a position to add an external power supply inside of my MP because I have an SSD in the second optical bay. I have a dual processor MP and have heard that the power supply in a Mac Pro cannot support both a 5870 and a 5770 when using a cable splitter. However, if this is wrong and I would be able to use this power splitter to power both the 5870 and a 5770 without the need for another power supply, that would be awesome. Right now I am looking at a GT 120. This will mainly be used for Maya. However, the viewport will be running on my main monitor from the 5870. The only windows I plan to have open through the GT 120 are simple windows like the outliner, hypershade, light linking, and stuff like that. Does anyone know if a GT 120 will cause any problems while having these windows running?