Video cards won't speed-up actual render times but it should help with drawing to screen & area renders. Check to see that the OpenGL drivers in tour extensions folder are the latest version & check the preffs for RDS to see if ther's an option for OpenGL (been to long since I've used it to remember). The best option would be to upgrade to CarraraStudio, the render times are about 5 times better then RDS 5.0.4 (or more).