CPU Cooling Test Configuration

The standard test bed for cooling tests uses an EVGA NVIDIA 680i SLI motherboard. This is primarily based on the consistent test results on this board and the excellent NVIDIA Monitor temperature measurement utility, which is part of the nTune program.


NVIDIA Monitor has a drop-down pane for temperature measurement which reports CPU, System, and GPU results. Reviews at this point will concentrate primarily on CPU temperature. In addition to the real-time temperature measurement, NVIDIA Monitor also has a logging feature which can record temperature to a file in standard increments (we selected every 4 seconds). This allows recording of temperatures during testing and play back, for example, of stress test results that can then be examined when the stress tests are completed. There is also the handy reference of speeds and voltages in the top pane to confirm the test setup.

NVIDIA Monitor was compared to test results from the Intel TAT (Thermal Analysis Tool). Intel TAT CPU portions do function properly on the EVGA 680i motherboard, but the chipset-specific features do not operate as they should. Idle temperatures in TAT were in line with measured idle temps with NVIDIA Monitor. The CPU stress testing with TAT pushing both cores showed TAT stress temps at 80% CPU usage roughly corresponded to temps reported in our real-world gaming benchmark.

Other components in the cooling test bed are generally the same as those used in our motherboard and memory test bed:

Cooling Performance Test Configuration
Processor Intel Core 2 Duo X6800
(x2, 2.93GHz, 4MB Unified Cache)
RAM 2x1GB Corsair Dominator PC2-8888 (DDR2-1111)
Hard Drive(s) Hitachi 250GB SATA2 enabled (16MB Buffer)
Video Card 1 x EVGA 7900GTX - All Standard Tests
Platform Drivers NVIDIA 9.53
NVIDIA nTune 5.05.22.00 (1/16/2007)
Video Drivers NVIDIA 93.71
CPU Cooling Thermaltake MaxOrb
Scythe Andy Samurai Master
Cooler Master GeminII
Noctua NH-U12F
ASUS Silent Square Pro
Scythe Ninja Plus Rev. B
OCZ Vindicator
Thermalright Ultra 120 Extreme
Thermalright Ultra 120
Scythe Infinity
Zalman CNS9700
Zalman CNS9500
Cooler Master Hyper 6+
Vigor Monsoon II Lite
Thermalright MST-9775
Scythe Katana
Tuniq Tower 120
Intel Stock HSF for X6800
Power Supply OCZ PowerStream 520W
Motherboards EVGA nForce 680i SLI (NVIDIA 680i)
Operating System Windows XP Professional SP2
BIOS Award P26 (1/12/2007)

All cooling tests are run with the components mounted in a standard mid-tower case. The idle and stress temperature tests are run with the case closed and standing as it would in most home setups. We do not use auxiliary fans in the test cooling case, except for the Northbridge fan attached to the 680i for overclocking.

Scythe and Thermaltake provided a generic white cooling compound, so we skipped this and tested with our standard premium silver-colored thermal compound. In our experience the thermal compound used makes little to no difference in cooling test results. This is particularly true now that processors ship with a large manufacturer-installed heatspreader. Our only control on thermal compound is that we use the manufacturer-supplied product if they supply a premium product or a standard high-quality thermal paste if a premium brand is not supplied.

We first tested the stock Intel cooler at standard X6800 speed, measuring the CPU temperature at idle and while the CPU was being stressed. We stressed the CPU by running continuous loops of the Far Cry River demo. The same tests were repeated at the highest stable overclock we could achieve with the stock cooler. Stable in this case meant the ability to handle our Far Cry looping for at least 30 minutes.

The same benchmarks were then run on the cooler under test at stock, highest stock cooler OC speed (3.73GHz), and the highest OC that could be achieved in the same setup with the cooler being tested. This allows measurement of the cooling efficiency of the test unit compared to stock and the improvement in overclocking capabilities, if any, from using the test cooler.

Noise Levels

In addition to cooling efficiency and overclocking abilities, users shopping for CPU cooling solutions may also be interested in the noise levels of the cooling devices they are considering. Noise levels are measured with the case open on its side and are measured using a C.E.M. DT-8850 Sound Level meter. This meter allows accurate sound level measurements from 35b dB to 130 dB with a resolution of 0.1 dB and an accuracy of 1.5 dB. This is sufficient for our needs in these tests, as measurement starts at the level of a relatively quiet room. Our own test room, with all computers and fans turned off, has a noise level of 36.4 dB.

Our procedures for measuring cooling system noise are described on the page reporting measured noise results comparing the stock Intel cooler and recently tested CPU coolers to the Thermaltake MaxOrb and Scythe Andy Samurai Master coolers.

Scythe Andy Samurai Master Cooling at Stock Speed
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  • Wesley Fink - Monday, June 4, 2007 - link

    We could change it to embedded, which we used several other times to refer to the MaxOrb fan. We just thought always calling it embedded might get boring ;-)
  • DrMrLordX - Monday, June 4, 2007 - link

    The VX recently won a large HSF shootout here:

    http://www.hexus.net/content/item.php?item=8757&am...">http://www.hexus.net/content/item.php?item=8757&am...

    I know you're doing things differently than Hexus, but still . . . why no VX? The Big Typhoon has already been shown to be an outstanding HSF with a high cfm fan (100-110 cfm being the sweet spot). The fact that it's a top-down cooler like the two you've tested here is merely an added bonus for those who own cases with otherwise-poor airflow that can become cooling dynamos with a powerful top-down cooler (thanks to the prevalence of side air ducts/air guides since the P4 days).

    Some folks have said the Scythe Andy is better than the Big Typhoon, but without a head-to-head comparison, will we ever know?
  • wollyka - Tuesday, June 5, 2007 - link

    it will be interesting to test also the Big Typhon VX like the OP said..
  • xsilver - Monday, June 4, 2007 - link

    the VX design looks a bit dodge because of the very high centre of gravity. with practically a 1kg cooler I dont want that lump of metal falling off and smashing onto a 8800gtx or something!

    at least with a tuniq style cooler the centre of gravity is much more evenly distributed.


    Personally Im thinking about a setup where you can have dual fans but only have the second one kick in when a certain temp. is reached or maximum load is triggered. Besides the thermalrights - which are too expensive imo, is the scythe ninja the best bet?
  • cujo - Monday, June 4, 2007 - link

    if you've used the bt you'll find it doesn't have a high center of gravity at all. it's far ligher than say my old xp90c.

    i was planning on getting a ultra 120 extreme based on this review but after the spanking he regular ultra 120 got in the hexus review i think i'll stick with my bt.

    i've asked at least twice in this comments section for the bt to be included but to no avail. i actually signed up an account just to ask.

    the one difference between anandtech and hexus that i think anand does better is use a consistent thermal paste. that's why i'd love to see how the bt performs in anands test environment.

    oh and for those who said "ha, they're using an old cpu." those old cpus ran so much hotter than the c2d's we're used to today. i figure it's a better test to use hotter cpus as opposed to modern cpus as those results will transfer over. i don't care how they cool my cpu, i care how they cool a hotter cpu than i will ever have.

    how many of us like seeing psu reviews where they test it up to the 500w that each of us would probably max use. no, we want to know how it handles it's full rated spec.
  • Wesley Fink - Tuesday, June 5, 2007 - link

    Since many have requested it, our next cooler review will be the Thermaltake Big Typhoon VX which we just received in the lab. Thanks to Frozen CPU for getting us a review sample so quickly.

    It is no wonder the review referenced did not get great performance from the Thermalright Ultra-120. We don't understand why, but the tested the Thermalright with a Noctua low-ouput Silent fan. Our top results were with a high output, but quiet Scythe S-Flex SFF21F. Not surprisingly the Noctua tower, using the same Noctua fan appeared about the same place in cooler performance as the Thermalright.

    Perhaps this was just an oversight on the reviewers part, but it appears the Thermalright was set up to do less than top performance in that review. Output of the VX is around 90CFM on high speed, our S-Flex is about 64CFM, and the Noctua is either 30CFM or 47CFM depending on which plug was used for the review.
  • DrMrLordX - Wednesday, June 6, 2007 - link

    Sweet. And yes, I did notice that Hexus tested the Ultra-120 with a pretty slow fan. The main advantage of the original Ultra-120, in my opinion, was that it could continue to benefit from more airflow up to (and exceeding) 140-150cfm. Most HSFs stop benefiting from increased airflow at much lower rates. It doesn't make much sense to use the Ultra-120 (or Ultra-120 eXtreme) with such a slow fan.

    However, Hexus also tested the Big Typhoon VX at half fan speed, which is around 43 cfm. Big Typhoons (and the VX) see notable improvement in performance all the way up to around 100-110 cfm (and 150 cfm will net you another 1C drop in temps . . . joy). So . . . take that however you will.

    Also, since you're responding to reader feedback (which is great), have you taken a look at this review here?

    http://forumz.tomshardware.com/hardware/DaClan-Rev...">http://forumz.tomshardware.com/hardware...-Interfa...

    This is really very interesting reading, especially in light of the fact that your testers have not found any noticeable difference in TIMs that you've used. Have you considered a high-end TIM shootout of your own?
  • jkostans - Monday, June 4, 2007 - link

    That hexus review doesn't make any sense. They used the thermal paste included with each cooler, rather than a single paste. While this will show out of the box performance, you can't directly compare the coolers to each other. I don't understand the reason for this, I buy my high performance coolers based on how the heat sink performs, not the included paste. I'd like to know who here buys a $60 cooler and doesn't use AS5 or similar paste. I usually like Hexus review too.....
  • DrMrLordX - Tuesday, June 5, 2007 - link

    Anandtech does about the same thing that Hexus does. They either use the included paste or bulk silver TIM, depending on whether or not any paste is included with the HSF.
  • Wesley Fink - Tuesday, June 5, 2007 - link

    DrMrLordX has correctly stated what we have said in many reviews. Our policy was to use the same quality silver-colored thermal paste if the cooler came with basic white paste of no paste, and the premium stuff if the cooler was supplied with a premium paste. We did this because our testing and experience shows Thermal Paste makes no difference as long as you use a good paste that doesn't dry out, but ig the mfg cared enough to supply the expensive stuff we would use it.

    We still believe Thermal Paste really doesn't matter, and we only changed to the same paste on each cooler review because we got tired of expalining the truth in every cooler review. Using the same paste just eliminated the questions. No, we will not tell you which paste we used because it is irrelevant. You just need to know we use the same quality paste on every cooler test these days.

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