Does the Lenovo ThinkCentre M930q use a standard desktop power supply?

Regarding the Lenovo ThinkCentre: No, the ThinkCentre M930q uses a laptop-style external 65W or 90W slim-tip AC adapter instead of an internal PSU. You can swap the brick for a higher-wattage one if running a 65W CPU, but internal power delivery is fixed. It’s good for office work, not for GPU ambitions.