Corsair introduced its new AX1200i (1200W) PSU with a integrated DSP that controls voltage regulation, resulting in higher efficiency (80 Plus Platinum rated, up to 92% efficiency) and better control over voltage ripple. The DSP allows Corsair to reduce component count within the PSU itself, which increases efficiency and reduces thermal output. As a result, for all loads below 480W the AX1200i is actually fanless by default. You can override the behavior but that's the default. 

Corsair exposes control and monitoring of the DSP via a bundled Corsair Link USB adapter and software. You can monitor power consumption on all attached connectors (e.g. PCIe, 24-ping) as well as keep an eye on efficiency and configure over current protection on the PCIe power connectors. 

The AX1200i will retail for $350 when it ships in late July/early August.