Noctua NH-U12F: Quiet Air Cooling from Austria
by Wesley Fink on April 25, 2007 4:00 AM EST- Posted in
- Cases/Cooling/PSUs
Noise
For many enthusiasts upgrading cooling the goal is maximum stable overclock, and they will live with the inconvenience of a louder system. For other users silence is the most important factor, and these users will forgo maximum overclocking if that increases system noise levels.There are virtually no power supplies that do not include a fan. While Zalman and a few others do make an expensive fanless power supplies, we have not seen a fanless unit larger than 500W, or one that would be used for seriously overclocking a system. With that in mind the noise level of the system with all fans turned off except the power supply was measured. The power supply used for the cooling test bed was the OCZ PowerStream 520, which is one of the quieter of the high performance power supplies.
We have also measured the Corsair 620-watt and Mushkin 650-watt power supplies which are reported to be quieter than the OCZ. Both the Corsair and Mushkin are indeed quieter at idle or start up speed. However, as soon as load testing begins and the PSU fan speed kicks up the measured noise level is almost exactly the same as the OCZ PowerStream 520 watt power supply.
We are currently in the process of evaluating "quieter" power supplies for an update to our cooler test bed. We will make changes to that test bed as soon as we are confident in the noise measurements and test procedures with a variable speed quiet PSU. We plan to evaluate additional power supplies and configurations in our upcoming 120mm fan roundup, at which point we will complete the transition to a revised and lower noise cooler test bed.
The noise level of the power supply was 38.3 dB from 24" (61cm) and 47 dB from 6" (152mm). The measured noise level of the test room is 36.4 dB, which would be considered a relatively quiet room with a noise floor slightly below the OCZ PowerStream 520 PSU.
We measured noise levels with the Noctua NH-U12F under both load and idle conditions. Results were then compared to the system noise floor. In all cases - stock fan, SilenX cooler, and dual Noctua fans in push-pull - the measured noise levels were below the system noise floor. The Noctua is also subjectively an exceptionally quiet heatpipe tower.
Measured noise levels in this chart should be considered worst case. Measurements were taken with an open side of a mid tower case 6" and 24" from the HSF. Real world would be a completely closed case resulting in a further reduction in noise. The measured noise levels at 6" and 24" are below the system noise floor in all tested Noctua configurations. The Noctua heatsink and the Noctua S12 fan seem to be carefully tuned for an optimum balance of air flow and silence.
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tk11 - Wednesday, April 25, 2007 - link
Enough with the heat sink reviews. They make something hot, cool... big deal... they're all virtually identical. Please review an interesting or useful technology before we all loose interest in the site.poohbear - Wednesday, April 25, 2007 - link
lol they're all virtually identical eh? u obviously do NOT overclock.tk11 - Wednesday, April 25, 2007 - link
Actually I do overclock... by identical I was referring to the lack of innovation. The main differences between these coolers are size and styling, neither of which require technical analysis. Being a long time reader I was simply expressing my lack of interest in the latest series of reviews in hopes that anandtech will return to covering some of the more interesting technologies.LoneWolf15 - Wednesday, April 25, 2007 - link
Speak for thyself, not others. Plenty of people read these; if you don't, feel free to move on.Jesse3G - Wednesday, April 25, 2007 - link
I'm amused that you freely speak for others, but presume to restrict the privlege from another? Your post flirts with hypocrisy and the person you addressed brought up a valid opinion.Personally I'm surprised at the management decision on this cooling coverage. Why handle one at a time when this topic can clearly be consolidated into a comprehensive discussion of cooling??? A true "round-up" would compile all of these reviews into an inclusive article for each major cooling system category, with Anantech's enclosed suggestions of the best setups available.
SurJector - Wednesday, April 25, 2007 - link
That would be nice to have those noise ratings: how does the stock fan compares with the SilenX and how much more noise the push-pull configuration makes ?Thanks for the reviews.
Wesley Fink - Wednesday, April 25, 2007 - link
We did try SilenX with push pull and the noise ratings were still below the system noise floor set by the power supply. Cooling performance was roughly the same as the stock Noctua fans in push-pull and the overclock was not extended, so we saw no reason to pursue it further. The Noctua ultra low noise fan appears to push a lot of air and apparently generates high air pressure compared to some other low noise solutions.puffpio - Wednesday, April 25, 2007 - link
So then..the ultimate review would probably be these Noctua 120mm fans on an Thermalright Ultra 120 Extreme in a push pull?poohbear - Wednesday, April 25, 2007 - link
well can u guys bug thermalright for an advance review of their IFX-14? u guys managed to review the TR ultra 120+ early, maybe u can do the same w/ the monstrous IFX-14?Wesley Fink - Friday, April 27, 2007 - link
Thermalright has just advised us that the Thermalright Ultra-120 eXtreme is in full production. The problem with the mounting plate has been corrected in the release cooler."The 775 bracket issue has been addressed and Ultra-120 eXtreme is now in full production. We think it’s even better than the engineering piece you received back then. Would you be able to verify that if we were to send you the “production” sample with its own packaging and all? I think you’ll be pleased to see the results and the improvements."
We have a final production sample with improvements on the way. We also have requested an IFX-14 for review.