With the 850W power, you'll have enough power for a computer with high-end video card. These power supply units are made to provide enough power to all components, including a processor, RAM, motherboard, and more. A PSU 750W is suitable for a mid-range to high-range gaming PC. Examples are the NVIDIA GTX 3070 Ti or 3080 and a high-end processor, like the 12th generation i7 CPUs.