The game in question is TESO and tried it with a 970 too, I did screen at the same point with all three video cards to have a benchmark of performance, the 7870 achieves 55fps (230W), with 970 83fps (250w) with r9 390 50fps consuming 300W !. I bought a few days ago a Nitro Sapphire AMD R9 390, after uninstalling with DDU and after re-installed the latest beta drivers have tried the games until a few days before I played with a HD 7870, I noticed that in some games the card does not express the full potential, as you will see in the video that I recorded the GPU works at sobbing like there's a limiter, I tested in all modes, without vsync of course, but the fps are not blocked because they reach based on visual even higher values, I can also see by the ammeter if the board is working very hard or not, and in fact, consumption is much lower than in other situations, for example in beta starwars board goes as it should, always gpu at 100%, then it's not even a hardware configuration problem, I think the drivers have serious problems dealing with energy conservation going completely haywire.
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