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Written by David Ramsey   
Wednesday, 27 July 2011
Table of Contents: Page Index
Cooler Master Hyper 612 PWM Heatsink
Closer Look: Cooler Master Hyper 612
Hyper 612 PWM Detailed Features
Heat Sink Test Methodology
Testing and Results
Final Thoughts and Conclusion

Testing and Results

For this test, I used the following heat sinks in addition to the Cooler Master Hyper 612 PWM:

  • Thermalright Venomous X
  • Thermalright Silver Arrow
  • Thermalright Macho HR-02
  • Thermaltake Frio OCK
  • Cooler Master V6 GT
  • Prolimatech Super Mega
  • Corsair Hydro Series H50
  • Corsair Hydro Series H70
  • Coolit ECO A.L.C.
  • Coolit Vantage A.L.C.
  • Antec Kühler H2O 620

For heat sinks without a stock fan, I used a Thermalright TR-FDB-12-1600 fan, which puts out 63.7CFM at 28dBa according to Thermalright. This mid-range fan provides good airflow and reasonable noise levels. For "apples to apples" testing, where each heat sink is tested with the same fan, I used a Delta AFC1212D. This high-performance PWM fan is rated at 113CFM at a claimed 46.5dBa at full speed...which means that while it moves quite a bit of air, it's very loud.

The Intel Core i7-950 I used in this test runs much hotter than the Core i7-920 I've used previously. At 1.35 volts, with a BCLK of 175Mhz, the 4,025Mhz CPU pumps out enough heat to stress the very best heat sinks. AIDA64 would report throttling once any single core reached 100 degrees Celsius; any throttling resulted in canceling the test and recording a "FAIL". This overclocked and overvolted Core i7-950 represents an extreme that many heat sinks cannot handle.

The chart below summarizes the results with the stock fans (hotter temperatures towards the top of the chart, and cooler temperatures towards the bottom). The twin-fan coolers have a real advantage here, since their dual fans generally move more air than the stock single fan of any of the other units. Remember that the lower the thermal difference is, the better the heat sink is performing.

Stock Fan Tests

Heat Sink (*=two fans)

Thermal Difference
(degrees Celsius)
from Hyper 612
Coolit ECO A.L.C. 75.2 +12.9
Corsair H50 73.1 +10.8
Coolit Vantage A.L.C. (extreme) 73.0 +10.7
Thermalright Macho HR-02 71.0 +8.7
Prolimatech Super Mega 67.2 +4.9
Antec Kühler H2O 620 65.9 +3.6
Corsair H70 (high)* 65.3 +3.0
Thermaltake Frio OCK* 65.2 +2.9
Thermalright Venomous X 63.0 +0.7
Cooler Master Hyper 612 PWM 62.3 +0.0
Thermalright Silver Arrow* 61.8 -0.5
Cooler Master V6 GT* 61.2 -1.1

As you might expect, the heat sinks that come with two fans tend to do better than those with only one fan...which makes the Hyper 612's performance all the more surprising. Connected directly the computer's power supply, the Hyper 612 PWM's fan is audible, but not particularly noisy. I'd say it doesn't sound like a fan that can push over 80CFM, but the results speak for themselves: the Cooler Master Hyper 612 PWM powers past most of the other coolers in this comparison. Nothing beats the Cooler Master's own V6 GT, but its dual fans cranked up to full speed for this test do extract a significant audio penalty, one that's arguably not worth the mere 1.1 degree advantage it has over its sibling.

Delta High Speed Fan Tests

Heat Sink

Thermal Difference
(degrees Celsius)
from Hyper 612
Corsair H50 68.1 +9.1
Coolit Vantage A.L.C. 67.8 +8.8
Corsair H70 64.7 +5.7
Thermalright Macho HR-02 64.5 +5.5
Thermaltake Frio OCK 64.3 +5.3
Coolit ECO A.L.C. 64.3 +5.3
Cooler Master V6 GT 59.5 +0.5
Prolimatech Super Mega 59.4 +0.4
Cooler Master Hyper 612 PWM 59.0 +0.0
Antec Kühler H2O 620 58.7 -0.3
Thermalright Venomous X 58.0 -1.0
Thermalright Silver Arrow 55.8 -3.2

The Delta high-speed fan attaches to the extra fan bracket Cooler Master includes with the Hyper 612 using four standard self-tapping fan screws, the short, stubby kind you'd normally use to mount case fans. The Delta fan is rated to move over 30 CFM more than the Hyper 612's stock fan, but that performance comes at the cost of very high noise levels. Still, beating the Prolimatech Super Mega and getting within a degree or two of all but the much larger and more expensive Thermalright Silver Arrow is an accomplishment Cooler Master can be proud of. The 3.3 degree drop is smaller than I normally see when using the Delta fan, indicating that the stock fan does a pretty good job. I think for most applications it would be better to use the extra fan mounting hardware to add a second, quieter fan to the rear of the cooler.

I'll summarize my opinions on this cooler in the next section.



# RE: Cooler Master Hyper 612 PWM HeatsinkPatrick 2011-07-27 20:06
Thanks for the nice and definately quick review on the new CM Hyper 612 PWM. One point of suggestion, though, about the adhesive removal, I'd use Acetone instead of WD-40 as it leaves residue behind, especially, the non-mirror finish base (e.g. w/ grooves). And, that Isopropyl alcohol won't completely remove all the residue left behind by the WD-40. However, it wouldn't affect the result of the test that much. Cheers.
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# RE: RE: Cooler Master Hyper 612 PWM HeatsinkDavid Ramsey 2011-07-27 20:26
Yeah, but I didn't have any acetone! I'll get some since this situation may come up again...
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# Good to see Cooler MasterBruce 2011-07-27 20:59
Nice to see Cooler Master is getting it's Mojo back. I picked up their little 92mm model (Hyper N520) for a slim case I have, and it's great where there are clearance issues.

I'm pretty amazed that they get such good performance out of this unit, with the low mounting pressure they designed in.

A hint on the acetone - look for nail polish remover, which is frequently stocked by the female residents of the house.
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# How does it compare to the 212?ET3D 2011-07-28 00:50
Thanks for the review. Since this is billed as an upgrade to the 212, it would have been interesting to see a more detailed comparison.
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# RE: How does it compare to the 212?David Ramsey 2011-07-28 08:04
Welll, to be fair, Cooler Master didn't bill it as an "upgrade to the 212"; that was just my impression. Still, the 212 results would have been in the table had Cooler Master sent us one, which they didn't, and I can only test what I have.
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# direct heatpipefresc0 2011-07-28 02:17
Good to see a move away from the direct contact heatpipes
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# RE: direct heatpipeDavid Ramsey 2011-07-28 08:02
Yeah, that fad seems to have died down. It never brought the performance improvements hoped for.
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# Typorazaron 2011-07-28 09:14
At the end of page 5 it should say "3.3 degree drop" not "4.3 degree drop".
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# RE: TypoDavid Ramsey 2011-07-28 20:43
You're right, and it's been fixed. Thanks!
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# Accuracy Mythbanthracis 2011-07-28 09:20
"While this diode and the motherboard are not calibrated and therefore may not display the actual true temperature, the degree of accuracy is constant. "

I'm pretty sure that's wrong. Per Intel, accuracy of thermal measurements is greatest as you approach the Tcontrol point.

"PECI is most accurate near the maximum temperature (PROCHOT#) and it is
accurate enough for fan speed control in the TCONTROL range but it can be very inaccurate at low temperatures." pg 19

Same also applies for DTS. See page calibration and variance graphs on pg 8 and 9 of the document.

Given this, the thermal measurements are MORE accurate as you approach Tcontrol and less accurate and temps get lower. Therefor, the degree of accuracy is not constant, but rather temperature dependent.
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# RE: Accuracy Mythbanthracis 2011-07-28 09:24
This variance in accuracy is also mentioned in Intel thermal specifications data sheet for sandy bridge CPU's on page 45 section 6.1

"Although each processors DTS is factory calibrated, the accuracy of the DTS will vary from part to part and may also vary slightly with temperature and voltage."
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# Hmm...Justair 2011-07-28 20:45
Your observation about Sandy Bridge proccessors (and newer ones down the pipeline) probably not needing aditional cooling seems a little optimistic. With their stock fan on the 2500K You can easily push past 75C with higher overclocks and during the summer months Idle it can go to 45C+ Even with the Hyper 212 I can hit 65C if I am overclocking.

I was a little put off by all that. So many people said oh it runs cool it runs cool .. you can hit 4.4G with the stock fan. Sure.. you can but it certainly won't run cool.

Anyway.. overall a great review.
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# RE: Hmm...David Ramsey 2011-07-28 20:53
I think you misinterpreted what I said, Justair. I didn't mean that you don't need any third party cooling at all; I meant that _expensive_, high end coolers (like the Megahalems or Silver Arrow) won't be needed.
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# RE: Cooler Master Hyper 612 PWM HeatsinkJustair 2011-07-29 16:41
Ah ok, Gotcha(ty for the clarification). With the Hyper212 sitting at what .. 29 bucks? I'd say most high end cooler are moot (unless your going for some sort of theme with one of the cool looking ones)The one thing this one may have over the 212 is it may be a little quieter. Temperatures seem fairly close.
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# RE: RE: Cooler Master Hyper 612 PWM HeatsinkDavid Ramsey 2011-07-29 17:21
I can't comment on the performance of the Hyper 212, since I've never tested cautious when comparing temperatures between different reviews, especially across web sites, as testing protocols will differ.
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# RE: Cooler Master Hyper 612 PWM HeatsinkLuis 2011-08-16 16:59
Where/When can I buy????
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# RE: RE: Cooler Master Hyper 612 PWM HeatsinkDavid Ramsey 2011-08-16 17:07
Good question. I can't find them available at any online merchant yet.
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# RE: RE: Cooler Master Hyper 612 PWM HeatsinkOlin Coles 2011-08-16 17:08
This review was published ahead of product stock into stores, so expect to see the Cooler Master Hyper 612 PWM make it into Newegg and Amazon very soon.
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# RE: RE: RE: Cooler Master Hyper 612 PWM HeatsinkLuis 2011-08-16 22:40
Thanks for the info! This thing looks like a beast!
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# RE: Cooler Master Hyper 612 PWM HeatsinkChrisH 2011-09-25 05:04
Hi, on the strength of this review and with some supplementary checking I've purchased the cooler. Will get the usual Arctic Fox paste and a second fan to maximize its potential. What worries me is the weight. Haven't the unit yet but I'm tossing up whether I'll add a small brace soldered from the centre seam (perpendicular to the fans) to above the side panel opening. Reason being the case does get moved around and the last thing one wants is to use the chipset as a moment. I'll find out if its feasible or not. Secondly, because RAM height is such an important precursor perhaps a measurement from the slot to the base of the cooler might help people out. Hence I'm buying CPU, mobo and cooler first then determining if my desired RAM will fit.Anyhow thanks for the review.
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# RE: RE: Cooler Master Hyper 612 PWM HeatsinkDavid Ramsey 2011-09-26 19:47
Any cooler that overhangs RAM slots will block RAM with tall heatsinks. Given that modern DDR3 simply doesn't get hot enough to actually require those silly heatsinks, I'd recommend simply always getting "low profile" RAM.
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# direct-heatpipe-worksRoj0 2013-05-05 18:31
Direct contact heat pipes actually work, it is the reason the 612 wont out perform the 212 evo...What can possibly be faulty with direct heat pipe? It makes contact with the hot surface directly rather than having some sort of base make contact & then that base make contact with the heat pipes, halfwits
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# RE: direct-heatpipe-worksDavid Ramsey 2013-05-05 19:04
Direct contact heat pipes are nice, but they're not the only design feature that affects cooler performance, and some coolers without direct contact heat pipes can outperform those with direct contact heat pipes. The flatness of the cooler base, the amount of clamping pressure, the physical amount of metal available to absorb the heat, and the airflow through the cooler are all important factors.
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