Matrox c900 is a single slot PCI Express x16 graphic card that can drive nine displays at resolutions of up to 1920 x 1200 each. This can be used as video walls for digital signage, control rooms and so on.
Two c900s can be paired to drive 18 screens (6×3 or 3×6) and the framelock feature keeps them in sync. It comes with 4GB of memory, nine mini HDMI connectors, and is DirectX 12 and OpenGL 4.4 compliant. It is also supported by Matrox’s MuraControl Video Wall management software for Windows and iPad.
Matrox c900 is priced at around $625.