Well-known German enthusiast Roman “der8auer” Hartung showed how to overclock non-designated Alder Lake processors with a locked multiplier and get a nice performance boost. For example, Der8auer increased the clock speed of the Intel Core i5-12400 chip to 5.2 GHz, resulting in a 33% performance increase in the synthetic Cinebench test and in games.
Der8auer noted that some ASUS motherboards based on the Intel Z690 chipset (ROG Maximus Apex and Maximus Hero in particular) allow you to change the BCLK bus frequency. It should be noted that this is only possible with a traditional Alder Lake processor, without the “K” index in the title.
According to Overclocker, the BCLK OC feature is implemented in ASUS Z690 Apex and Z690 Hero motherboards with BIOS version 0811. However, it does not work on ROG Strix Z690-I. Der8auer suggests that BCLK OC is only available on flagship motherboards based on the Intel Z690 chipset with a separate (external) clock generator.
The enthusiast demonstrated the overclocking process of the traditional Alder Lake on a video.
He noted that in the case of Alder Lake processors, overclocking via the BCLK bus does not affect the operation of peripherals, for example, devices connected via the PCIe bus, which makes the method not only quite simple, but generally safe .
However, the process still requires attention, as it is accompanied by an increase in the voltage across the cores to 1.35-1.37 V, an increase in temperature and an increase in power consumption, which must be taken into account when choosing a cooling system for an overclocked processor .
In this way, Der8auer overclocked two processors at the same time. With the Core i5-12400, the performance gain was clear. The chip ran at 5.2GHz with all six cores active, resulting in a natural increase in performance in benchmarks and games.
With the Core i5-12600, the frequency was set to 5.1 GHz on all cores. However, the result of overclocking was more modest – power increased by 16%.