Rather than trying to use that badly made overclocking function, the best thing would be to go by my
Guide: How to set good power limits in the BIOS and reduce the CPU power draw, it describes two steps to optimize how a CPU is running. Step 1), setting proper power limits for your system, and step 2) Lowering a setting called "CPU Lite Load", for huge benefits in lower voltage, lower power draw, less heat, and even higher performance within the power limits.
However, the B-series board prevents step 2) from having the best effect, because with that chipset you won't have the ability to disable a certain other setting "IA CEP Support" (or disabling it is not effective). You can - and should - lower "CPU Lite Load" a bit, but maybe only to Mode 11 or 12, not nearly as much as you potentially could on a Z-series board, where - with it all being fully effective - you'd only have upsides, and could gain even more performance.
If you were to use GameBoost instead, on Intel what that usually does is, it cancels out the normal boosting mechanisms as well as the intelligent power-saving mechanisms, instead it applies higher VCore for a fixed all-core OC, which is not how it should be done nowadays. While this OC can look a bit better in full multithreaded benchmarks, it will have more downsides than positives in daily use. The clocks will be kept high all the time for no reason, but with any kind of partial CPU load (which is far more common than full load on all cores), it may do worse than normal, because the normal boosting is prevented. And we haven't even gone into detail on how much the CPUs have been pushed from factory today already. The 12700K was still more decent than the successors in that it's not a total monster yet, but that's only if you don't try to push it much further yourself.