3DMark is the latest version of this hugely-popular synthetic benchmark. Making use of DX11 features such as tessellation, compute shaders and multi-threading, it provides modern-day results and is available as a free download.
Going by specification alone, Gigabyte's card is overclocked slightly higher on core than Inno3D's, so what gives? The numbers written on the box don't always tell the full story, as real-world boost speeds can and will vary. During use, we caught Inno3D's iChill GTX 980 Ti Black skipping along at 1,443MHz. Gigabyte's GTX 980 Xtreme Gaming WaterForce clocked just 1,430MHz.