For small form factor, Intel is able to offer the best performance/graphics due to including a mobile based processor (better graphics performance for integrated graphics.)  Linux support was tricky, though possible.  I have no idea why anyone would consider this a gaming platform though.  Gaming performance, even with external PCIe graphics would be an extremely poor replacement for even a small for factor system with native PCIe.  If you're buying a system for gaming, do not buy this.  However, this is an exceptionally good option for an HTPC, including 4k video playback.