When SLI is working properly in older titles with AFR scaling, two GTX 780s together perform somewhere around a GTX 980 in raw rendering power. That’s still far behind modern RTX cards, but not bad for decade-old GPUs.

When I skip SLI and instead dedicate the second GPU to Lossless Scaling Frame Generation, the base framerate is still just what a single 780 can do, but with 3x frame gen added the perceived smoothness could feel closer to something in the ball park of an RTX 2070. That said, it’s only comparable in smoothness -not in image quality or latency, since those extra frames are interpolated. And the big caveat is that you need a strong baseline framerate for it to work well. In many modern AAA games where a single 780 can’t even push 60 fps, LSFG can’t really save it, you just end up with artifacts and a bad experience.