The Lenovo ThinkCentre M930q uses a laptop-style power brick

The ThinkCentre M930q doesn’t have an internal PSU at all — it’s powered by an external 65W or 90W slim-tip AC adapter, just like a laptop. You can swap the brick for a higher-wattage one if you’re running a 65W CPU, but what you see is what you get for the internal power delivery. Good for office work, not great for GPU ambitions.