XFX ProSeries Core vs Black Edition
I found a noise level for the Seasonic G series psu.
http://www.legitreviews.com/seasonic-g-series-550w-ssr-550rm-power-supply-review_2148/7
I guess that's pretty quiet right?
I found a noise level for the XFX black edition aswell.
http://www.legitreviews.com/xfx-pro-series-850w-black-edition-psu-review_2239/7
The black edition is louder, is it because it uses more watts?
An 850w at full load would be louder than a 550w unit at full load, as it require a fan and fan profile that allow it to effectively cool a higher wattage unit. The Black Edition would be quiet overall though, as the fan does not spin up until 30% load, while the Seasonic G is an actively cool unit. Both the Seasonic G and Black Edition is around ~30dBA at 550w load; however, I'm unsure of how good their testing equipment are (I don't look at LegitiReviews for PSU reviews).
While the XFX XTR is a Seasonic G unit, like I had said, XFX had made the XTR to be semi-passively cooled and has a quieter fan than both the 2BB fan in the original Seasonic G and the Black Edition.
Here's a review on the XFX XTR 750w. http://www.hardocp.com/article/2014/03/06/xfx_xtr_750w_power_supply_review/1#.U4OVkSgYqy0
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