I recently bought two Sapphire Nitro+ RX 480 cards to run in CrossFireX but this system doesn't work in any of my PC games (e.g. The Witcher 3 GOTY edition, Dark Souls 3 and so on).
Each time I run them I "always" get 20-30 Fps but both cards run fine and load 90-100% (GPU1 and GPU2); the CPU load is from 80 to 92.
On the other hand, when I run Heaven Benchmark all it works fine (I get 85 Fps on average, CPU load from 90 to 95 and a score of around 2200).
What's wrong with my system? Do you have any suggestions? Thanks a lot anyway!
My system information are:
CPU: Intel Core 2 Quad Q9650 @ 3,00 GHz
RAM: 8 GB DDR3 1600 MHz Corsair Dominator
MB: Asus P5E3 Pro (with 2 PCI-E 2.0 slots both @ 16X)
GPU: Sapphire Nitro+ RX 480 x 2
HD: SSD Samsung 850 EVO
AMD driver: Crimson ReLive Edition 17.2.1
OS: Windows 10 64-bit