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Disclaimer: my pc is located in a basement room, as far away from the street as my house will allow. i'd say it's pretty quiet in there.my main problem with sfx is the noise. i have used an air cooled system for a while, with an atx power supply, and it was pretty quiet. but after switching to a watercooled system with a sfx psu, the system is basically dead silent, except for the power supply. I only have a 970 and a 4690k, but the 600w psu is still the most noisy part by far and raises the noise level above my earlier aircooled system. so the point you made at the end is crucial, efficiency needs to improve a lot. until then i think even gigantic and hopelessly overpowered 1500W atx psus have their place for silence freaks such as myself, because they will basically always run in passive mode.
Disclaimer: my pc is located in a basement room, as far away from the street as my house will allow. i'd say it's pretty quiet in there.
my main problem with sfx is the noise. i have used an air cooled system for a while, with an atx power supply, and it was pretty quiet. but after switching to a watercooled system with a sfx psu, the system is basically dead silent, except for the power supply. I only have a 970 and a 4690k, but the 600w psu is still the most noisy part by far and raises the noise level above my earlier aircooled system. so the point you made at the end is crucial, efficiency needs to improve a lot. until then i think even gigantic and hopelessly overpowered 1500W atx psus have their place for silence freaks such as myself, because they will basically always run in passive mode.