Rejoice! Base Clock Overclocking to Make a Comeback with "Skylake"

Since Intel fully integrated the core logic (northbridge) with its processors, overclocking them by tinkering with the base-clock (BClk, the primary clock domain from which the CPU's clock speed is set using multipliers), became unstable, as it was used as a cadence for other key components on the chip, such as iGPU and PCIe root-complex. Apparently, with its 6th generation Core "Skylake" processors, Intel has de-linked base-clock from other clock domains, re-enabling overclocking using BClk, which is particularly helpful on non-K (upwards multiplier locked) SKUs.

Some of the first motherboards that enable BClk overclocking on Skylake CPUs come from Supermicro, the server/workstation motherboard maker that's dipping its toes into DIY enthusiast platforms these days. "Dhenzjhen," an overclocker from the Philippines struck gold by achieving a 5.00 GHz overclock on a Core i3-6320 dual-core chip, using a Supermicro C7H170-M motherboard (which is driven by an Intel H170 chipset). Shortly after news of this feat broke, ASRock fired an email to the press, stating that its Z170 Extreme7+ motherboard is able to support 4.50 GHz clocks on a Core i5-6600 quad-core chip, using an experimental BIOS. ASRock is validating this BIOS internally, and hopes to release it "very soon."