想法很好，但這不就跟SLI、CF一樣嗎?
現階段這些多卡技術，在有支援的遊戲下才能有等比例的效率提升
以消費級顯示卡來說，CF會遇到的問題，多GPU MCM(也就是你說的nGCX)都會遇到

https://wccftech.com/amd-navi-gpus-...x-gaming-cards/

節錄最後一段:
"But on the gaming graphics card side, David mentions that while the hardware implementation exists to make it work, the software side still needs a lot of updating. It’s quite the same thing as Crossfire or any other multi-GPU interface that exists for gamers. Unless there’s proper software support, you won’t see any gains and with MCM, you are basically trying to make multiple GPUs look like a single GPU. You already know how well things went with SLI and Crossfire which are literally dead and have nill support from game developers. But the issue only exists with gaming industry since, in the server space, multiple GPUs can work together seamlessly with proper performance scaling, unlike Crossfire and SLI. So for Navi, an MCM die seems out of the equation but hopefully, AMD will be able to deliver a working solution in their Radeon cards in future."

https://research.nvidia.com/publica...hip-Module-GPUs
NVIDIA之前就想搞多GPU MCM，但應該是朝計算卡方面發展

最主要是因為3D遊戲的圖形運作機制(舊版API)對多GPU並不友善
https://wechat.kanfb.com/archives/231069
看起來起碼要"純"dx12遊戲才能完美支援多GPU
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或許等下一代遊戲主機出現，相關軟硬體方面才會開花結果