Hey I see a lot of VirtualBox topics to run RR that is not necessary, i use a program called  dg voodoo 2 is used to run old games. http://dege.freeweb.hu/dgVoodoo2.html  download  dgVoodoo v2.53 (released: 11.09.2016) and open the folder MS and take the 3 dll files and move them to your RR instal folder same place you put the d3drm.dll.    and that is it, it worked for me and am running RR in 1080p now.    If you want to use voodoo for extras options watch this video he