Intel Core i5 12600K / Core i9 12900K "Alder Lake" Linux Performance
Written by Michael Larabel in Processors on 4 November 2021. Page 12 of 14. 134 Comments

Out of 146 performance benchmarks ran across all of these tested AMD and Intel processors on Ubuntu 21.10, the Core i9 12900K successfully led in 54% (78) of these benchmarks while the Ryzen 9 5950X was in first place for 30% (44) of the benchmarks.

When taking the geometric mean of all 146 benchmarks, the Core i9 12900K came out to being 3% faster than the Ryzen 9 5950X across that entire range of CPU/system benchmarks carried out. The Core i5 12600K meanwhile came out to being 2% faster than the Ryzen 7 5800X and nearly matching the Core i9 11900K overall. At this time the Core i9 12900K does also carry the advantage on pricing if Internet retailers are indeed able to provide the i9-12900K in stock at around the $589 price tag.

For multi-threaded workloads is where Alder Lake isn't compelling at all with its power consumption... We recorded the Core i9 12900K hitting a power consumption as high as 258.57 Watts during testing. The Core i5 12600K saw a peak CPU power consumption of 125.57 Watts. Throughout the same set of benchmarks, the Ryzen 9 5950X had ap eak power consumption of 154 Watts.

The Noctua U9S with dual-fan configuration was capable of cooling the i9-12900K sufficiently for a vast majority of the time, but there were rare instances of it approaching 100 degrees. The average temperature across the mix of single and multi-threaded workloads with this cooler for the i9-12900K was 47 degrees.

On a performance-per-dollar basis, the Core i5 12600K was commonly leading among the tested CPUs, assuming Alder Lake retail pricing is accurate.

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