Originally Posted by wermcran
Thanks for everyone feedback and patience with me (I def have a low amount of knowledge on these matters).
I'm gonna pull the trigger on the Seasonic G550 sometime in the next 48hrs (waiting to see if there's a deal soon). My last hang up is about noise. I assume 80 Gold PSUs are typically great for low noise cause of the minimum heat production?
The quality of a PSU can't be judged by its 80+ Certification. There are Gold-rated PSUs that are a huge rip-off.
Anyway, your power draw will be tiny on this unit and that's the first thing that will result in silence. The 2nd is this PSU has a feature called Smart Fan Technology: the fan only spins when it needs to. Then when it does spin, it only spins at the speed it needs to be at in order to keep the PSU's internal temperature down.
Originally Posted by bfromcolo
Is there anything different about a power supply for Haswell versus other CPUs? I have Corsair CX430 in each of my systems, seems like a solid unit and $20 after rebate on Newegg at the moment.
The best way that I can answer this is by showing you this post:
Edited by TwoCables - 6/30/13 at 8:03pm
Originally Posted by qwan456
An independent PSU or a PSU with a DC-DC secondary will "compatible" with Haswell C7 power state.
Lower-ends group-regulated PSU may have issues with it. Basically, this power state may keep the load of the +12v rail as low as 0.05A, and the whole scare is that the load on the minor 3.3/5v rails will affect the voltage of the +12v and have go out of spec (the higher the load on the 5v, the higher the voltage goes on the +12v). So when you put your computer to sleep and get out of it, the OVP protection of the PSU may trip off and your computer will not power up.
The thing is that it is unlikely that the load on the minor rail during this low power state isn't high enough to cause this problem anyways, so chances are, you don't have to worry even if it is not officially compatible (the testing methodology done by Intel and such is likely tested more in a worse case, unlikely scenario). If you do run into this problem, however, you should be able to disable this feature on the motherboard's BIOS.