Link to issue on AMD support forum is here. People will need to wait for a proper working driver. This is an optimization issue on AMD's side. OpenGL runs 10-70% slower compared to Direct3D.But be wary this causes BSODs and crashes in the display driver on Windows when Blending Unit Accuracy is set to None (so keep it at least to the default "Basic" level). You can use 17.1.2 atioglxx.dll and override_GL_ARB_separate_shader_objects=1 gsdx.ini option to restore old behaviour in newer PCSX2 build. Confirmed fixed as of driver release 18.11.1 Dual Source Blending is broken on AMD drivers.A (hopefully temporary) workaround to address the issue has been added to PCSX2. It was momentarily fixed in 16.7.3, but it was reverted in 17.2.1 to fix the BSOD issue below. It causes garbled graphics every time the extension is enabled. SSO (Separate Shader Objects Extension) is broken on AMD drivers.There is a PCSX2 discussion thread regarding the mentioned issues here. The issues have been reported on the AMD support forum for a year now, but any fixes AMD has released so far have either introduced new bugs or reintroduced old bugs. The driver lacks performance optimizations and several extensions are currently broken. Due to a buggy driver OpenGL will perform poorly on AMD GPUs.
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