小弟用390和GTX1080去跑2K@VERY HIGH(SMAA), 用GPU-Z監控, 發現兩
者吃的VRAM不一樣, 和底下比較雷同, 390雖然有8GB, 但好像吃到4GB左右
而已, GTX1080則吃到6GB以上, 不過只簡單測試一下, 沒有嚴謹的數據, 照理
說, 若VRAM尚未用罄, 應該把材質丟VRAM中, 而不是主記憶體, 又或者是驅
動對VRAM管理或壓縮機制不同導致, 這點連測試者也無法解釋...
http://www.hardocp.com/article/2016...13#.V8sXaVV95D8
With the AMD Radeon R9 390X we only ever say the dynamic VRAM hit 230MB usage; it was averaging 200MB through every resolution and AA setting. In terms of the dedicated VRAM it strangely did not consume anywhere near what the GTX 980 Ti or TITAN X did. Possibly due to AMD having more advanced texture compression...