- AMD Graphics Card
- Desktop System
- Lenovo H50-55 (With added on r7-240)
- Operating System
- Windows 10 64bit
- Driver version installed
- Radeon Software Crimson Edition 16.9.2
- Display Devices
- Asus VP247, HDMI, 1080p, 60hz
- Lenovo OEM
- Power Supply Unit Make, Model & Wattage
- Some shitty 280W (huntkey I think)
So CCC, device manager, and GPU-Z all say that crossfire is enabled (although GPU-z sees 3 GPUs in crossfire for some reason...), but I don't think it actually is. In DX11 games, I see absolutely no difference between dual graphics mode and the 240 by itself.
My main testing ground is the game Middle Earth: Shadow of Mordor. Its a DX11 game, with a benchmark tool. In fullscreen mode, 720p, low settings, the avg and low fps values are identical.
Compare that result with the testing done on this site here. This site shows a clear 20 fps avg boost with dual graphics (this graph and this graph). I should note my results were ~ 43/32 (avg/min), which is identical to the results this site achieved with the integrated chip only.
I should see a noticeable performance boost with dual graphics for DX11 games, so what gives?
Is it because I'm only using a single stick of RAM? Does my mobo not support dual graphics? Is my weak PSU causing issues?
Attached is my GPU-Z, device manager, and CCC screenshot, showing that crossfire is "on"
PS: Even though I have the Crossfire logo option "on", I have yet to see the crossfire logo.