We talked about AMD RX Vega CrossFire support being added with a new driver update. While the drivers are still in beta we got to see some benchmarks from AMD that showed how well the AMD RX Vega graphics cards scaled when used with one another. It seems that AMD RX Vega CrossFire scaling is actually pretty terrible.
It is important to note here that two same cards were not used for these tests, an AMD RX Vega 56 was paired with the AMD RX Vega 64. It should be noted that the AMD benchmarks were for 2 AMD RX Vega 64 GPUs but this is also another way of giving people an idea of what to expect while using what you have available.
Modern-day titles were used for the test and the games that AMD tested were also included. Surprisingly not only was there no improvement in performance when adding the second card but in some cases, there were negative performance gains as well. It is possible that the AMD RX Vega 56 was slowing down the AMD Vega 64.
The only title that scaled almost perfectly was GTAV. Other games like Sniper Elite 4, Tomb Raider and Witcher 3 also scaled well but we saw negative scaling in titles like Battlefield 1, Civilization 6, Doom and F1 2016. You can check out the details here.
It is also interesting to note that the CrossFire profiles for the previous Polaris GPUs might not have provided the best performance, but the performance was consistent. It is possible that AMD might need to introduce new CrossFire profiles updated for AMD RX Vega GPUs.
At this point, we can only hope that 2x AMD RX Vega 64 or 2X AMD RX Vega 56 GPUs provide better performance as compared to what we have seen here.
Let us know what you think about AMD RX Vega CrossFire scaling and whether or not you have experienced something similar.