Brand names do not design and manufacture basic components. They buy, or request specific Motherboards from OEM. From an enthusiast perspective there is motherboard X on model number Y and the general name Dell, HP, etc. is meaningless.
In order to reduce cost the Motherboards in use can do well what the Brand want the PC to do, but are not flexible and rich with features to play with.
However HP and others use a lot of different Models, so if you have in mind a specific model log to HP?s support, look for the manual and other technical information and find out what the Motherboard can do.