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C6/C7 Power States worth it?

Last response: in Components
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October 6, 2013 5:57:48 AM

Doing my first build:
I have a single graphic card, have a Haswell processor, namely i7-4770. I am not planning to OC and it looks like 550W would suit my needs.

I have seen new power supplies supporting C6/C7 power saving states. My question is, is it worth it to spend more on the psu so it would be Haswell-ready or is it not going to make a difference for me?

More about : power states worth

a b ) Power supply
a b U Graphics card
October 6, 2013 6:06:53 AM

C6 / C7 States only apply when the PC is under sleep / hibernation / standby states. So no.
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October 6, 2013 6:10:03 AM

dottorrent said:
C6 / C7 States only apply when the PC is under sleep / hibernation / standby states. So no.


yeah i know that, but this for instance analyzes the impact of enabling them on a 4770k system and seems to observe a noticeable difference:

"We found that with C6/C7 disabled that the system would idle between 23.7 and 24.1 Watts, but with them enabled we were seeing between 20.5 to 21.2 Watts."

wondering how that applies to my system.
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Best solution

a b ) Power supply
a b U Graphics card
October 6, 2013 6:16:27 AM

It doesn't exactly make such a massive impact on your system. It just lowers power usage and temperatures on the CPU cores. As long as your current PSU is a good branded one, you should be fine with Haswell.
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