Last check, go to Device Manager, check if there is a Video card section in the list of hardware installed. If there is, check what model it is. If there isn't a Video card section in the device manager, then chances are there isn't any dedicated GPU.
The Monitor cable and PS/2 should be at least 5 inches apart if there is a dedicated GPU (since the monitor should be plugged into the card, not the motherboard, it sounds increasing likely that your monitor is plugged directly into the motherboard, which suggest a lack of dedicated GPU).