Top Tier CPU Air Coolers Q3 2015: 9-Way Roundup Review
by E. Fylladitakis on July 6, 2015 8:00 AM ESTThe Be Quiet! Dark Rock Pro 3
Be Quiet! is a German manufacturer of cooling, case and power PC-related products and one of the few European companies that has managed to push their way into the North American markets. We have checked a few of their power supplies in recent months and most recently saw their new cases and fans at Computex. For this review the company supplied us with the best and largest cooler they currently offer, the Dark Rock Pro 3.
The Dark Rock Pro 3 is supplied into a bizarrely shaped, deep cardboard box, well protected within thick layers of polyethylene foam and cardboard walls. A very basic black and white leaflet with installation instructions and the absolute necessary parts for the mounting of the cooler are supplied, nothing more, with the sole exception of two wire clips for those that want to install a third fan on the cooler.
Much as its name suggests, the Dark Rock Pro 3 is a very large, dark cooler. It is a symmetric dual tower design, meaning that the seven 6 mm heatpipes run through the base and to a separate cooling tower on either side. A metallic black top cover extends across the entire cooling body, covering both towers and the middle cooling fan but leaving the front fan exposed. With the exception of the black top cover, everything else is nickel-plated.
The front of each tower forms a jagged saw tooth design facing the fan that inclines inwards toward the center of the tower, while the rear forms a geometric pattern fashioned from half-octagons. The jagged front is supposed to reduce harsh airflow state transitions and aerodynamic noise, but the rear is most likely shaped for aesthetic purposes only.
The company is using their own SilentWings series fans on the Dark Rock Pro 3. The dimensions of each fan differs, with a 135 mm fan installed between the towers and an 120 mm fan at the front of the cooler. Still, both fans share the same features, such as the decoupling frames, wavy blades and six pole engines with fluid dynamic bearings. They are very high quality and expensive models, yet they are optimized for low noise operation, not high static pressure, which we will see the results of in the testing.
Be Quiet! paid a lot of attention to the base of the Dark Rock Pro 3. It is a very solid construct, forming a small heatsink, possibly to aid the overall performance of the cooler a little bit. The base has been polished to a perfect mirror finish, with no imperfections to be found.
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zodiacfml - Tuesday, July 7, 2015 - link
Someone should test for this. It is quite plausible as it will take time to increase the temperature of water/coolant in the system. Yet, for longer and continuous loads, surface area matters to dump heat in the environment which AIO coolers has less to a similarly priced Big Air cooler which shows in benchmarks.Navvie - Tuesday, July 7, 2015 - link
Pretty good.It'd be nice if there was a base line (say intel's current stock cooler) and an AIO water cooler to show the difference between a top tier air cooler and what many consider to be the next step.
One point, SPCR always test each cooler with a 'reference' fan, making it easier to compare the heatsink's efficiency. Can't help but feel you didn't complete the task you set out to by levelling the playing field with your simulated CPU heat source.
maximumGPU - Tuesday, July 7, 2015 - link
Great roundup! i for one still believe high end air a good alternative to water if you want dead silence.What i still can't understand is how can Nocuta get away with shipping the most expensive air cooler, likely to be used by enthusiasts who care about aesthetics, with the most hideous fan colours?
'nar - Tuesday, July 7, 2015 - link
Noctua colors are odd, but I think it forces you to consider performance more than aesthetics. They do look nice, but not "cool" - no pun in tended.Dead silence basically depends on how much heat you need to dissipate, temperature of ambient air, surface area of fins/radiator, air flow, and heat transfer capability of the cooler. Or more basically, how easily you can transfer heat from CPU to the air. Water increases the efficiency of heat transfer, so once you reach a certain power level they will overtake HSF's. They will never be as quite as a good HSF, at least not on low-power CPU's that arguably do not need anything but the stock cooler to begin with.
xthetenth - Tuesday, July 7, 2015 - link
Noctua gets away with those colors entirely because they're Noctua. Yes they're not pretty colors, but unlike nice bright/garish colors they are an unmistakable sign that they're the best or at least tied for best.piroroadkill - Wednesday, July 8, 2015 - link
Your keyboard seems to have a problem, you've typed "hideous" when clearly "fantastic" would be better. Noctua fans are neat.Beaver M. - Wednesday, July 15, 2015 - link
Well, serious people are more likely to buy Noctua anyway. And no serious user cares about what the fans look like, and even if they did, they would still take the Noctua, since you can CLEARLY see the extremely high quality they are just by looking at them. Windows in cases and other stupid bling bling is for the PC-ricer gang. They only choose after looks anyway, and dont care if their fans make noises from day one.PrinceGaz - Tuesday, July 7, 2015 - link
Excellent review of what seem to be very good HSFs throughout (but then again, you did ask them to send their best).A comparison with the stock Intel cooler as supplied with something like the 4790K would be nice, as that is what any expense on a third-party cooler must be compared against. How would the stock-cooler compare at 340W? I was very impressed with the degC/W figures for all those coolers; it almost makes 340W seem an amount of heat that can be dealt with, though I'm thinking it's crazy.
As well as the stock-cooler from a highish end CPU, one or two commonly used AIO liquid-coolers needs to be added to provided a second comparison point, as these high-end air-coolers are presumably expected to be near, possibly even better than a liquid AIO.
I love the fact you are using a properly designed heating rig, and your comprehensive review, but I came away thinking: they're good! But I've no idea how much better they are than the stock cooler, or how any of them would compare with the liquid AIOs also available, both in terms of cooling or noise.
Sivar - Tuesday, July 7, 2015 - link
This is probably the best CPU cooler article I've read (and I read such articles when Anandtech when it was on Geocities).Excellent writing, useful measurements, and a cogent conclusion. Thank you, Emmanouil!
orangesky - Tuesday, July 7, 2015 - link
SilentPcReview just posted a review of the new Scythe Ninja 4: http://www.silentpcreview.com/article1462-page1.ht... The review includes some good comparison tables with many of the popular air & water coolers.Sounds like a pretty decent option, and probably the best Ninja since the original.