針對FC4的測試，看來NV的卡比較吃香一些，如果開啟NVIDIA專屬畫質會更吃
資源。另外這個遊戲似乎也是動態使用VRAM，有可能越吃越多…

http://www.gamersnexus.net/game-ben...is-broken-again


Far Cry 4 VRAM & RAM Consumption
We expanded upon our VRAM test from the Assassin's Creed Unity benchmark last week, now testing VRAM consumption on various graphics presets. VRAM consumption hovered in the ~3.5GB range when using high-end GPUs capable of Ultra settings. Even at the game's lowest settings, if VRAM was available for use, Far Cry would find ways to put it to use; we saw roughly 2GB VRAM consumed even on “low” settings, proving that larger framebuffers are rapidly becoming relevant.