Does your PSU have to be Haswell certified to work well on Haswell PCs?

Somasundaram Sathiyathasan · Mar 25, 2015

All in the question

bignastyid · Mar 25, 2015

No, you just have to disable the new low power c states(c6 and c7) in the bios, many retail manufactures do this by default. It is preferred to have a Haswell ready PSU but not required.

ccampy · Mar 25, 2015

Officially yea but you can normally disable the c1e (I think) sleep state in motherboards BIOS and most PSUs will work fine

synphul · Mar 25, 2015

bignastyid is correct, my psu isn't near new enough to be haswell certified compatible but 0 issues with it. Just make sure the c6/7 sleep states are disabled in the bios. They're deeper more energy efficient sleep states and if a power supply isn't certified to handle them it can cause issues. Basically a system will enter the deeper c6/7 sleep state but because it's such low power it's not enough for older psu's to wake up properly and instead shut off requiring a full boot to turn the system back on.

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Does your PSU have to be Haswell certified to work well on Haswell PCs?

Somasundaram Sathiyathasan

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bignastyid

bignastyid

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ccampy

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synphul

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