Intel has disabled DLVR Bypass on its Core Ultra 200S, a move that will result in significant power dissipation at high loads, which now won't be able to be bypassed by the user, which was easier to do with the previous BIOS versions.
Intel says it disabled DLVR Bypass on Core Ultra 200S CPUs to prevent "Misuse" and will only unlock it for extreme overclocking
Intel's DLVR or Digital Linear Voltage Regulator was introduced back in 2021 but was integrated in 2022 with Raptor Lake processors even though it was disabled. However, DLVR is integrated into Intel's Arrow Lake Core Ultra 200S processors by default, which seeks to enhance the power efficiency of these CPUs.
There are some advantages as well as limitations linked to Intel DLVR and therefore, Intel provides users with the option to disable/bypass the DLVR mode through the motherboard BIOS on Z890 motherboards. This, however, won't be the case with the latest BIOS update that brings the microcode 0x112.
As reported by HardwareLUXX, one of their community members, "Trill", found out that his ASRock Z890 Pro RS motherboard doesn't have the option to bypass the DLVR mode. Typically, this is shown as "Power Gate Mode" in the BIOS, which helps minimize power dissipation to a significant extent. The new BIOS only has the 'Stable Mode' as shown by the user and no Power Gate Mode is available.
The DLVR has problems when it comes to high loads since the DLVR introduces dynamic adjustment of the voltage in response to the changes in processing demand. Even though DLVR manages to get sufficient power to the CPU under high loads, it results in higher power dissipation of up to 90W as a result of converting the high input voltage to the appropriate output voltage for the CPU cores and clusters.
ARL ucode 0x112 disables Power Gate mode for ambient cooling - only available for extreme OC now 💩
— SkatterBencher (@skatterbencher) November 13, 2024
This impacts the power efficiency at higher loads, but with a bypass, users were given the option to turn this feature off on their Z890 motherboards. Thankfully, the power dissipation isn't that huge at low loads, including gaming, which is where the DLVR shines. Considering Intel's comments on the matter, it isn't clear how users can misuse the DLVR bypass mode,
This was done to prevent accidental misuse of DLVR bypass, also known as power gate mode, by ensuring it's only used in extreme overclocking scenarios with sub-ambient cooling such as liquid nitrogen.
Intel is only enabling this with Nitrogen Cooling, which will rarely be implemented by users. As of now, only ASRock and MSI motherboards are implementing the microcode 0x112 with the latest BIOS, but Gigabyte and ASUS haven't released the latest one.
News Source: HardwareLUXX
About the author: Sarfraz Khan is a hardware reporter with a focus on PC components and the builder community. With years of experience writing about PC hardware and laptops, his work has been featured on several reputable technology publications. Sarfraz's hands-on experience is demonstrated through his first-person accounts of using and comparing different hardware configurations, providing practical and relatable insights for everyday users. His technical analysis is respected by peers in the enthusiast community and has been cited by specialized hardware sites such as Germany's Igor's Lab.
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