ROG MAXIMUS Z790 HERO

ASUS became the first manufacturer to implement phase-doublers with the A8N32-SLI Deluxe motherboard, back in 2005. The board's VRM was lauded for elegantly overcoming the power handling capabilities of components that were available at the time while also reducing voltage ripple. Those benefits led to phase-doublers becoming universally accepted in the industry, and they are still used for similar purposes today.

Modern CPUs pack more cores than their predecessors, and the latest instruction sets allow them to crunch computationally dense workloads at an incredible pace. In addition, they consume less power at idle and can transition between load states much more quickly. These improvements necessitate a re-evaluation of power-design priorities because phase-doublers add a propagation delay that hampers transient response.

Fortunately, the latest integrated power components can handle higher currents than the devices of yesteryear, making it possible to implement a simple circuit topology that isn't hamstrung by the processing lag of phase-doublers. That's why the ROG Maximus Z790 Hero utilizes teamed power stages to deliver higher burst current per phase, while maintaining the thermal performance of phase-doubled designs.

Each VRM component serves a specific purpose. PWM controllers and phase-doublers control the circuit, and the power stages do the heavy lifting from an electrical and thermal standpoint. The power stages feature low RDSON to reduce switching and conduction losses, helping to improve overall thermal headroom.