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What makes a PSU a "haswell PSU" ?

#1Dirk85UKPosted 11/13/2013 12:06:58 PM
On one of the biggest UK computer component online retailers, there is a section for "Haswell compatible PSU's". Does this mean that all PSU's not listed there (Which is most) won't be compatible with a haswell build? Here's the link:

http://www.overclockers.co.uk/productlist.php?groupid=701&catid=123&subid=2597
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#2ThePCElitistPosted 11/13/2013 12:08:08 PM
Who knows. These companies make up bs to make products look better to the ill informed.
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#3WyzeGyePosted 11/13/2013 12:08:33 PM
Haswell is supposed to take up less energy, so it may be a marketing term for a weak PSU
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#4Dirk85UK(Topic Creator)Posted 11/13/2013 12:09:49 PM
WyzeGye posted...
Haswell is supposed to take up less energy, so it may be a marketing term for a weak PSU


But if you look at the list in the link, you will see that some of the best PSU's are listed under the haswell compatible PSU list.
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#5arleasPosted 11/13/2013 12:12:10 PM
From: Dirk85UK | #004
some of the best PSU's are listed under the haswell compatible PSU list


Sounds like Marketing speak to me... Unless there are PSU's out there that really won't work at all with a Haswell CPU...I can't imagine why they'd make them in such a way though.
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#6Orestes417Posted 11/13/2013 12:16:50 PM
No, it most certainly isn't marketing. Haswell has a new power state that requires the CPU be able to deliver extremely low power cleanly. A lot of older and lower quality PSUs won't do it so you end up having to either disable the power state in BIOS to use them or get instability.
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#7AltmadragonPosted 11/13/2013 12:24:57 PM(edited)
the sticker is to show if sleep mode can be activated with that psu, that's it

Most Motherboards disable the haswell low power state by default.
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#8Snuckie7Posted 11/13/2013 12:24:52 PM
Orestes417 posted...
No, it most certainly isn't marketing. Haswell has a new power state that requires the CPU be able to deliver extremely low power cleanly. A lot of older and lower quality PSUs won't do it so you end up having to either disable the power state in BIOS to use them or get instability.


This. PSUs that don't meet the spec were causing system resets when the computer was put to sleep mode.

http://techreport.com/review/24897/the-big-haswell-psu-compatibility-list
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#9Killah PriestPosted 11/13/2013 12:25:59 PM
No, it most certainly isn't marketing. Haswell has a new power state that requires the CPU be able to deliver extremely low power cleanly. A lot of older and lower quality PSUs won't do it so you end up having to either disable the power state in BIOS to use them or get instability.

Exactly.
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#10ShubPosted 11/13/2013 12:26:32 PM
Orestes417 posted...
No, it most certainly isn't marketing. Haswell has a new power state that requires the CPU be able to deliver extremely low power cleanly. A lot of older and lower quality PSUs won't do it so you end up having to either disable the power state in BIOS to use them or get instability.


That's exactly what it is.
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