Forever will not run on graphics cards older than a set generation from each maker.
- Minimum: AMD Graphics Core Next 1 (2012), NVIDIA Maxwell (2014) or Intel Skylake (2015), with RGBA16F UAV support in compute shaders.
- Compatible examples: Radeon HD 7850, GeForce GTX 750 Ti and Intel HD Graphics 530. Blizzard says those are still well below the minimum requirements.
- Unsupported examples: Radeon HD 6950, GeForce GTX 760 and Intel HD Graphics 6000.
- Kaivax, 18 Sep: a beta launcher line listed Windows 11 against a Windows 10 minimum, and he pointed to this GPU article.
Unconfirmed the launcher error's cause, and RAM, CPU and the rest of the minimum spec.
Source Blizzard's Forever GPU notice.