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    Home Unlabelled Hardware support: LTT is About to Change. (Linus is building a new studio for benchmarking and testing hardware)

    Hardware support: LTT is About to Change. (Linus is building a new studio for benchmarking and testing hardware)

    November 18, 2021

    Hardware support: LTT is About to Change. (Linus is building a new studio for benchmarking and testing hardware)

    LTT is About to Change. (Linus is building a new studio for benchmarking and testing hardware)

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    Core i9-12900K: Performance & efficiency at various power limits (2W to 250W)

    Posted: 18 Nov 2021 02:39 AM PST

    According to these CPU-Z benchmarks, it looks like a power limit of 175 watts is a good operating point for the Core i9-12900K: Only 5% performance loss compared to the maximum, for 50 watts less power consumption. However, larger benchmark sets are necessary to determine the real performance loss. The CPU-Z benchmark scales very well (as known), with a larger benchmark set the average performance gain should be a bit lower - maybe at 3%.

    Same benchmark values as a diagram.

     

    Core i9-12900K      CPU-Z/MT   =Perf.    =Eff.    CPU Temp 
    Power limit 250W 11667.6 100% 100% >100°C
    Power limit 225W 11576.1 99% 110% 97°C
    Power limit 200W 11371.1 97% 122% 88°C
    Power limit 175W 11058.5 95% 135% 81°C
    Power limit 150W 10740.9 92% 153% 74°C
    Power limit 125W 10292.2 88% 176% 67°C
    Power limit 100W 9482.3 81% 203% 59°C
    Power limit 75W 7984.9 68% 228% 66°C
    Power limit 50W 6611.1 57% 283% 58°C
    Power limit 25W 4410.5 38% 378% 44°C
    Power limit 2W 932.7 8% 999% 30°C

     

    Sources: 3DCenter.org, based on benchmarks by Geldmann3 / Perschistence @ 3DCenter forums

    submitted by /u/Voodoo2-SLi
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