The multi-GPU solutions from AMD and Nvidia cannot yet benefit from their architecture here. Notwithstanding the latest drivers, they only use one GPU to run the game. This concerns the Radeon HD 6990, GeForce GTX 590 as well as any CrossFireX or SLI configuration. Hopefully, the GPU developers won’t forget about Heroes and will optimize their solutions for it just as they do for Battlefield 3 and Rage.
The single-chip AMD Radeon HD 6970 and Nvidia GeForce GTX 580 have very close results. Either of them allows using the highest graphics quality settings you can choose, including a resolution up to 2560x1600 pixels.
AMD's performance-class solutions seem to cope with Might & Magic Heroes VI better than their Nvidia counterparts. Considering the price difference, the Radeon HD 6950 comes out the winner of the race, closely followed by the more expensive GeForce GTX 570. Both cards are a good choice for playing the game irrespective of your monitor’s capabilities.
As for the next pair of fighters – Radeon HD 6870 vs. GeForce GTX 560 Ti – the former is cheaper whereas the latter features a newer GPU architecture. Despite these differences, the results are very close. The most affordable product in this category, Radeon HD 6850, isn't far behind, either. Although it can't challenge the faster solutions, it delivers a playable frame rate at any resolution up to 2560x1600.
AMD’s mainstream products have improved after the rebranding. We’ve got a clear winner here, which is the more surprising as the Radeon HD 6770 is based on a GPU architecture developed back in 2009. It is in fact the single graphics card in this category which copes with the game at 2560x1600. The Radeon HD 6750 and the GeForce GTX 550 Ti share second place.
The most affordable solutions in this review, Radeon HD 6670 and GeForce GT 545 DDR3, can notch 30 fps in Might & Magic Heroes IV but do not deliver a playable frame rate at the highest resolutions. And if you’ve got a GeForce GT 530-like graphics card, you will have to compromise in terms of graphics quality. This card can only give you 20 fps even at the lowest of the tested resolutions. By the way, the game would quit to the desktop when we tried to benchmark the GeForce GT 530 at 2560x1600, but such an entry-level card cannot be really rebuked for that.