Anyway at all that I can get accelerated graphics to work in Adobe Pr Pro (CC, CC14, CC15 or CC17) on imac w/ 660m 512vram????

I have been going nuts trying to figure out why this iMac with a 660m will not allow me to use the accelerated graphics with Adobe Pr or Ae. Then I saw that I need a little more vram than the 512 that I have. I have a PC that has 3GB dedicated but I want to use my imac. Any way at all without ripping this 27 inch screen off or getting a new mortgage..... I mean mac!!!!!