2080 VS 1070 SLI benchmarks. A true Side-grade - Graphics Cards - Linus Tech Tips
GTX 1080 Ti SLI vs GTX 1080/ GTX 1070 SLI 4K Gaming Benchmarks! - YouTube
Testing GTX 1070 ASUS Strix in SLI. Some great performance improvements, some not so great. But anyway doubled performance in Unigine:Superposition makes me happy : r/gamingpc
NVidia GeForce GTX 980 Ti SLI Benchmark & Review vs. GTX 980 SLI, Titan X | GamersNexus - Gaming PC Builds & Hardware Benchmarks