For users running a $20 Xeon E5-2666 v3, flipping this switch can turn a 2.9GHz chip into a 3.5GHz all-core beast without touching software.
To enable Turbo Boost on all cores for Xeon V3 processors, a custom BIOS flash is required. This is a common modification, but it carries a risk of bricking the board. x99-turbo v1.31
If you purchased a $35 X99 motherboard from AliExpress or Amazon, you likely received a stock BIOS dated 2018 or 2019. With that firmware, a Xeon E5-2690 v3 (12-core, 2.6GHz base, 3.5GHz boost) will struggle to maintain 3.3GHz under a full load due to power throttling. For users running a $20 Xeon E5-2666 v3,