In our Thief test, the different between the GTX 970 SLI and a single GTX 970 card was not as big, but we still see the GTX 970 SLI delivers a substantially better result (13%) than the GTX 780 Ti SLI configuration. Although GTX 780 Ti fairs better in single GPU tests, the GTX 970 SLI still outpaces the GTX 780 Ti SLI.