Useful things to know before you build a gaming PC Which parts of your gaming PC should you upgrade first? How much power do you need? Best mid-tower ATX PC cases: Top cases for your gaming PC Start by working out the wattage What about your case? Nvidia GeForce RTX 40 Series requirements The Nvidia GeForce RTX 4090 requires 450-watt TGP (total graphics power) which means you need at least an 850-watt PSU (more if you have a lot of components) The Nvidia GeForce RTX 4080 requires 320-watt TGP meaning you need a minimum 750-watt PSU Alternative cables
