A few hours ago I asked elsewhere in MacRumors whether a modern Metal 2 GPU existed for High Sierra on a Mac Pro 5,1 that will also provide hardware acceleration under Snow Leopard. Unless some of you knows better, it would appear the answer is negative. Be that as it may, is there a particular and reasonably-priced GPU, easy to install on a Mac Pro 5,1 that you recommend that will provide the full Metal 2 experience on High Sierra? Thanks. Note to Moderators: Please, correct the name of this thread, as I can't seem to find how to do it myself. Naturally, the title should be "Metal 2 GPU for Mac Pro 5,1".