With the new WU's having a stable 3d mark vantage run or kombuster means nothing!
Watch your Temps in Afterburner at stock clocks be sure to manually adjust the fan as they will heat up that 460 in a hurry!
As Tom stated 460's are excellent now if these cards are in your possession or could be had for realitively cheap you can run GPU2 no problem but aren't as efficient per say.
I didn't think you could fold GPU 3 with 200 series cards?