Is the KILLDOZER worth it over a Steam Machine?

It uses standard desktop parts, so you can swap the GPU, add RAM and expand storage later, which a fixed-spec console cannot match. The trade-off is size, and SteamOS still has the same game compatibility limits.

Can I play games outside Steam on it?

SteamOS runs Steam titles natively. Non-Steam games need Proton or a launcher workaround, and some anti-cheat multiplayer games do not run at all.

Is the Ryzen 7 7800X3D a good match for the RX 9070 XT?

Yes. The 7800X3D's 3D V-Cache keeps CPU-heavy games like strategy and simulation titles fed, and it leaves the 9070 XT room to drive high frame rates at 1440p.

Can I upgrade the GPU later?

Yes. It uses a standard PCIe slot and an 850W 80+ Gold power supply, so a future graphics card swap is possible within that power budget.

What comes in the box?

The desktop as configured: Ryzen 7 7800X3D, RX 9070 XT, 32GB DDR5-5600, 2TB NVMe SSD, B650M WiFi motherboard, 240mm AIO and 850W Gold PSU in the Lian Li B4 case, with SteamOS installed.