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Other details (existing parts lists, whether any peripherals are needed, what you're upgrading from, when you're going to buy, what resolution and refresh rate you want to play at, etc):
Right now im running a 10700k and 3090 with an EVGA 850 G5 gold power supply and havent really had any issues. I am upgrading my setup to alder lake 12900k. The 12900k and 3090 fe are beefy components. Should I buy a 1000w psu and use that instead of my 850w? I plugged everything into Pc Part picker and it says estimated wattage is 730W but ive heard the 3090 can draw 400 w of power. So im not sure if thats peak wattage or just a baseline.