A member of the LinusTechTips community miraculously managed to get hold of a working Intel Larrabee graphics card, which was installed in a modern system with Windows 10 on board.
Recall that Larrabee was Intel's 2008 attempt to build a GPU, or rather a GPGPU, separately from the design that led to Iris Pro. Rather than follow in the footsteps of NVIDIA and ATI, Larrabee used the X86 instruction set with special extensions and the GPU it worked more like a hybrid between a CPU and a GPU. It also did much of its work in software rather than using specialized graphics hardware, using a tile-based rendering approach. The idea was to create a card that could accelerate workloads other than just video games and achieve visual effects that GPUs could not currently handle, such as real-time ray tracing and erratic shadow mapping.
Got the Intel Larrabee Working from LinusTechTips
Obviously, there are no official drivers for Windows 10, but the card can still be used as a basic graphics adapter. However, the owner intends to decompile the BIOS to get some more information.