This is what was used on the last Video Card Review done by OCF.
I'd wager these are going to be your go-to tests:
3DMark Fire Strike – Extreme, default setting.
3DMark Time Spy – Default
Unigine Valley Benchmark v1.0 – 1080p, DX11, Ultra Quality, 8x AA, Full Screen
Unigine Heaven (HWbot) – Extreme setting
Crysis 3 – Very High settings with 8xMSAA/16xAF (2nd level when you procure and use the Crossbow to get across the level and kill the Helicopter)
Metro:LL – DX11, Very High, 16xAF, Motion Blur – Normal, SSAA Enabled, DX11 Tessellation – Very High, Advanced PhysX – Disabled, Scene D6
Dirt: Rally – 1080p, 8x MSAA, everything on Ultra that can be, enable Advanced Blending
Grand Theft Auto V – 1080p, high settings (see article below for details).
Middle Earth: Shadow of Mordor – 1080p, everything Ultra that can be (Lighting quality High), FXAA and Camera + Object Blur, DOF/OIT/Tessellation enabled.
Rise of the Tomb Raider – 1080p, SSAA 4X, VSync Off, DirectX 12 On, Very High Preset
The Division – 1080p, Ultra Preset, VSync Off
Far Cry: Primal – 1080p, Ultra Preset, VSync Off
Ashes of the Singularity – 1080p, DX12, Crazy Preset