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Thermaltake, a leading supplier of computer chassis, thermal solutions and power supply units, announced this week that the majority of its advanced power supply units are fully compatible with Intel Core i-series “Haswell” central processing units. All current high-end and mainstream PSUs from Thermaltake are already prepared for the new Intel processors to deliver stable voltages to achieve maximum energy savings.

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.

The list of Thermaltake PSUs compatible with Intel Core i-series 4000-family “Haswell” microprocessors looks as follows:


Tags: Thermaltake, Intel, Haswell, Core, 22nm, Shark Bay, Lynx Point


Comments currently: 10
Discussion started: 05/25/13 12:24:55 PM
Latest comment: 03/01/16 12:16:20 AM


Why should I need a 650 w PSU with a system with low power consumption, integrated graphics and SSD? Where are the 300 to 450 w PSU's compatibles with Haswell? And please check your title.
0 0 [Posted by: mosu  | Date: 05/25/13 12:24:55 PM]

they just want to make money
4 0 [Posted by: mudi1  | Date: 05/26/13 07:16:59 AM]

Mosu and Mudi1 both bring up excellent points!

It wasn't too many years ago that I got into a discussion with a sales representative from a major computer electronics store that had been told (acting like "sheeple" that you absolutely *needed* a 650 - 750++ watt power supply. I told him it's the single most OVER emphasized claim in computing (the original IBM PC ran on 65 watts and a lot of power hungry TTL). After looking up what the motherboard itself required along with the CPU (power wise) - the conclusion is we could get by with FAR FAR less power capabilities than what was (and this is key) being >marketed.< This is ALL about marketing and infusing more and more money into the industry (self-perpetuating money machine) than it has anything to do with "needs." Now I grant you, for those running two (or more) power-hungry video cards, then, yes, there are obviously additional power requirements. But for a vast majority of PC users - these power capacities are simply overkill to a MAX. If you think you're buying additional "reliability" with additional power capacity - consider where a switching supply is MOST efficient relative to capacity. It will re-align your rationale.
3 0 [Posted by: eng1  | Date: 05/26/13 07:38:06 AM]

New PSU is required for Haswell's new power state. Current PSUs won't be able to enter that new power state without crashing.
0 0 [Posted by: deltatux  | Date: 05/28/13 10:27:57 AM]

I agree with eng1.

Then again of course I would...I'm a power engineer >_>.
1 0 [Posted by: Jedi2155  | Date: 06/01/13 04:24:05 PM]


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