Up for sale is Intel NUC 12 Enthusiast with Official Steam OS Installed to function like just released Steam Machine.
Because Valve just started making intel drivers possible on Steam OS, the performance is about 25% slower than its graphical potential for now. I am pretty sure Valve will catch up to Windows counterpart in terms of gaming performance with future Steam OS updates. I would assume the current performance is on par with Steam Machine but because this has more RAM & VRAM, with future updates, this would perform better than Steam Machine.
Spec: Intel i7 12700H, 32 Gb DDR4 RAM, Intel Arc a770m 16 Gb GDDR6 VRAM, 1 Tb NVME SSD, 2x Thunderbolt USB-C Ports, Intel Killer WiFi, Intel 2.5Gb LAN, SDXC Slot, 330W Power Brick, Vertical Stand, Original Box, Preinstalled Steam OS
Dimension: 9.1 inch x 7.1 inch x 2.4 inch