Users of Intel's 13th Gen unlocked K-series processors such as Core i9-13900K, i7-13700K, are reporting stability issues when gaming even at stock clock-speeds. Hassan Mujtaba of Wccftech and Tom's Hardware have isolated the issues to power limit unlocks. Most Z690 and Z790 chipset motherboards include BIOS-level unlocks for the power limits, particularly the Maximum Turbo Power (interchangeable with PL2). By default, the i9-13900K and i7-13700K come with a PL2 value of 253 W, but you can get the motherboard to unlock this to unlimited, which basically tells the processor that it has 4096 W of power on tap, so not technically a "stock" configuration anymore.
Of course, neither your PSU nor your CPU VRM are capable of delivering 4096 W, and so the processor tends to draw as much power as it needs, to maintain the best possible P-core boost frequencies, before running into thermal limits. At stock frequencies with stock boost bins, unlocked power limits can drive the power draw of i9-13900K as far high as 373 W under a multithreaded load,
in our testing, when compared to 283 W with the power limits in place. It turns out, that unlocking the power limits can come with long-term costs, besides the literal cost of electricity—the processor's stability with gaming workloads can degrade with certain hardware combos and settings.