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CPU and PSU compatibility

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#1 Alchemist


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Posted 28 December 2015 - 04:10 PM

With the Haswell CPUs the power regulator was moved into the CPU itself, and there was a potential problem if the power supply didn't handle the new "very low" power states correctly. Your machine could go into a "rest" state and cause a reboot. Now with this latest generation called Skylake, Intel has moved the power regulator off the CPU again and onto the motherboard. So, does this mean the possible problem is solved? Or do we have to check if any PSU we want to buy is compatible with the power states of the most recent CPUs? If so, how do you check for compatibility of a PSU with the new CPUs?

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#2 Drillingmachine


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Posted 29 December 2015 - 06:28 AM

Haswell problem was that C6/C7 power saving states required 0.05A input on +12V line from PSU. Disabling those power saving states from BIOS make any PSU "Haswell compatible". Many manufacturers advertised PSU's as "Haswell compatible". I have no idea if Skylake has those C6/C7 states in use.

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