Seasonic, another leading supplier of high-end power supply units for personal computers, this week has published a list of PSUs compatible with Intel Corp.’s next-generation Core i-series “Haswell” microprocessors. As it appears, virtually all 80 Plus Platinum, Gold, Silver and Bronze PSUs can support low-power states of Haswell.
It recently transpired that Intel Haswell's C6/C7 power states require a minimum load of 0.05A on the 12V2 rail, whereas many desktop PSUs just cannot provide that low current. Numerous older PSUs, which comply with ATX12V v2.3 design guidelines that only called for a minimum load of 0.5A on the CPU power rail, can be equipped with a less sophisticated internal feedback loop/protection that cannot supply 0.05A to CPU. As a result, unless C6/C7 power states are disabled in the BIOS, PCs with older/cheap PSUs may become unstable when processors enter these states. To make the matters worse, many power supply units do not report minimum currents supported by 12V2 rail. As a result, it is now hard for system makers and end-users to determine whether their PSUs are Intel Core i-series “Haswell” compatible.
“We are inspired by the continuing efforts made by Intel to push the boundaries of performance and at the same time, be environmentally conscious through reduction of energy consumption. These are the exact same attributes which have driven Sea Sonic for the past 35+ years. As we strive for industry leading performance, we continue to research the long term effects of each of our design. By continuously improving our efficiency we try to achieve maximum energy savings and by using high quality components we aim to prolong product lifetime; all to achieve long term sustainability,” a statement by Seasonic reads.
As it appears, Seasonic’s full lines of 80 Plus Platinum and Gold power supplies have been designed to be ready to meet Haswell's new technical requirements/ The ultra efficient Platinum series, which also includes the industry leading true fanless models, and long running X series, which is now supported by the 80 Plus Gold G series are also compatible with Haswell-generation microprocessors. In addition, 80 Plus Bronze models M12II-650, 750 and 850W are also compatible with future-gen Intel chips.