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Started by sebapee | | 2 answers
Experience with Seasonic S12II-620 and Haswell CPU
Hello!

So i ordered a Seasonic S12II and read afterwards that it's not Haswell certified and will crash on idle due to the low amp(0,05)

Does anyone have both a Haswell intel i-series CPU and this PSU running without a crash?

also i read you can disable these low amp states from BIOS by disabling c6/c7. does anyone have any experience with this?

otherwise i could order the M12II-750 instead, it's supposed to be certified according to some list of haswell certified psu's.

Thanks in advance.
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Best solution chosen by sebapee

a b ) Power supply
a b å Intel
a c 111 à CPUs
October 17, 2014 10:35:40 AM

It's not a crash per se. In Haswell CPUs there is a low-power sleep state that is so low that the PSU can't wake from it (or cannot enter it and switch off - I don't recall precisely). All you have to do is to disable that power state in the BIOS and you will have no problems at all.

Here is the full story: http://techreport.com/news/24738/few-psus-support-haswe...
a c 156 ) Power supply
a b å Intel
a c 376 à CPUs
October 17, 2014 10:35:34 AM

I would not worry.
C6/C7 are ultra low sleep states that are not really necessary and more useful to laptops running on battery.

Seasonic is about the best out there.

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