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Cooler Master Hyper 612 PWM Heatsink E-mail
Reviews - Featured Reviews: Cooling
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

CPU Cooler Final Thoughts

The choice of fan is critical in getting the best performance from a CPU cooler (even a water cooling system). Size, noise, airflow, and even static pressure are all things that must be taken into account. The fan Cooler Master uses strikes an excellent balance between noise and airflow, and as you can see from the test results provides excellent performance with this cooler. I have no doubt that adding a second similar fan would provide even better performance than the single Delta high-speed fan.


I've been saying in my last few CPU cooler reviews that the need for expensive, high performance coolers will fade as newer, lower-power processors such as Intel's Sandy Bridge become more common. A processor with a maximum TDP of 95 watts simply doesn't need the amount of cooling that a 140W CPU does. Sure, power consumption will go up significantly with overclocking, but newer processor will still put out less heat than older ones.

That said, I've started noticing another trend: lower-priced coolers that perform at the level of higher-priced coolers. The Cooler Master Hyper 612 PWM performs at the level of the Thermalright Silver Arrow or Cooler Master's own V6 GT with stock fans, but costs almost 33% less than either. Given the exceptional cooling provided by its single fan, adding another quiet PWM fan would probably make this equal to the very best air coolers out there. How it can achieve these results without features like Prolimatech's massive mounting system is a mystery. Perhaps there's some magic sauce in the heat pipes.

Cooler Master Hyper 612 PWM Conclusion

Please remember that these test results reflect our experience with each cooler on a specific motherboard, with a specific processor, BIOS revision, BCLK and voltage settings, and test programs. The results of this test cannot be directly compared to other tests since many factors will have changed.

There's nothing special about the appearance of the Cooler Master Hyper 612 PWM: it's a standard multi-heat pipe design with a copper base. The small extra fin array on top of the base is unusual, but it won't be visible even in a windowed case. The orientation of the heat pipes-- running from the front to the back of the cooler, rather than from side to side-- is a little unusual although not unprecedented: the Thermalright Silver Arrow uses the same design. Given its performance, the shock-and-awe appearance of the Thermalright Silver Arrow or the LED bling of the V6 GT would be the only real reasons to prefer these more expensive products.

Overall, the construction quality is very good. It doesn't have the "hewn from a block of steel" feel of a Prolimatech heat sink, but everything's there and fits well.

I was surprised to see the residue the protective sticker left on the heat sink base. I've never run across this in any of my other cooler testing, and it's definitely something Cooler Master should look into.

The accessories package was standard, and it was nice of Cooler Master to use re-sealable plastic bags to make it easier to keep track of the screws and bits you don't use. The extra fan mounts make adding a second fan at a later time easy. The mounting mechanism, especially the spring-loaded screws, seemed a little "lightweight", but you can't argue with the results.

The performance of this cooler was excellent, almost unprecedented at this price level ($49.99 at Newegg). Which brings us to the value aspect: not everyone needs a cooler that can handle the very hottest processors, and those who don't overclock, or have Sandy Bridge CPUs, can save some money on a less expensive cooler. But if you are one of the few whose rig dims the house lights when it's turned on, you can save a bit of coin with the Hyper 612 PWM over its more expensive competition.

Pros:Benchmark Reviews Golden Tachometer Award

+ Amazing performance for the price...for any price, really
+ Almost silent operation
+ Quiet, PWM-controlled fan
+ Extra fan mount included


- Protective sticker leaves residue on heat sink base
- Rather pedestrian appearance


  • Performance: 9.75
  • Appearance: 8.0
  • Construction: 9.0
  • Functionality: 8.5
  • Value: 9.75

Final Score: 9.0 out of 10.

Excellence Achievement: Benchmark Reviews Golden Tachometer Award.

Questions? Comments? Benchmark Reviews really wants your feedback. We invite you to leave your remarks in our Discussion Forum.

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# 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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