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Fractal Design releases PSU list approved for Intel Haswell processors

Fractal Design releases Haswell friendly PSU list.

@CharlesJGantt
Published Wed, May 22 2013 1:30 PM CDT   |   Updated Tue, Nov 3 2020 12:23 PM CST

With its 4th Generation Intel Core processors AKA "Haswell," Intel has introduced a new power saving feature that reduces consumption while the CPU sleeps. This new deep state sleep mode is called "C7" and is causing a lot of tech insiders to second guess if older power supplies will be able to function properly with Haswell.

Fractal Design releases PSU list approved for Intel Haswell processors 1 | TweakTown.com
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This morning Fractal Design released a list of their PSUs that are Haswell friendly. With 12 models throughout its Newton R3, Tesla R2, Integra R2 PSU lines on the list, Fractal says that its customers can rest easily knowing that their PSU is compatible with the next generation of Intel processors.

Fractal Design releases PSU list approved for Intel Haswell processors 2 | TweakTown.com

The issues come from the new deepest sleep state, called C7, will be able to reduce the power consumption of the CPU to only 0.05A (0.6W). As this occurs in the deep sleep state, when most other 12V devices are either in low-power states or turned off, this can reduce the 12V load on the power supply significantly.

For some power supplies this low load can cause voltage regulation issues, if combined with high loads on the minor rails (3.3V and 5V).

A web developer by day, Charles comes to TweakTown after a short break from the Tech Journalism world. Formerly the Editor in Chief at TheBestCaseScenario, he now writes Maker and DIY content. Charles is a self proclaimed Maker of Things and is a major supporter of the Maker movement. In his free time, Charles likes to build just about anything, with past projects ranging from custom PC cooling control systems to 3D printers. Other expensive addictions include Photography, Astronomy and Home Automation.

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