I started out with a 460 GTX 768MB and wanted to go SLI. Someone suggested I use SLI Hack since I have a 790X mobo. The patch installed no problem so I bought a second 460 768MB only they sent me a 1GB model. Will the difference in memory size cause the SLI option to not show in the nVidia Control Panel? Because I can't find any way to enable SLI.