this post was submitted on 24 Dec 2025
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Weird aside, but I have a 14900k which just eats power. About 400ish watts draw during CPU benchmarks for total ststem draw. I had a 1000w psu and finally got a 5090. Now a 400w cpu + 600w gpu should not work- but it did. I did stress test both at the same time and hit 1100w, but it lived. Thing is, most games do not stress borh CPU and GPU at max at the same time, so real world usage I was always under.
Still, I want headroom, so I got a deal on a 1500w psu. New PSU is more efficient, and running the same simultaneous cpu/gpu benchmark I hit about 960w, so the efficiency bump kept me under my old psu limit. It did lead me to get a new PSU, but technically it would have been mostly okay.