Introduction

The CPU cooler market has lost in recent years undoubtedly explosive. A growing number of manufacturers and marketing to, whose Produktentwicklungen differ only in detail is stagnant technical concepts. Only a few manufacturers really still trying with courageous projects this Tristesse to break something. To the experimentierfreudigeren Guild is one of the Japanese coolers and peripheral specialist Scythe, which from time to time like to surprise you with something UNUSAL, erfrischenderen product creations.

The latest Scythe coup listens to the name “Susanoo”, the God of the wind and the sea in Japanese mythology, and embodies a processor cooler giant who used no fewer than four 100 mm fan and 12 heatpipes in top-blow design. We give a taste of the good 1.5 kilograms heavy cooling Ungetüm.

Scope of delivery

The delivery of Susanoo comprises the heatsink together with mounted fan Quartet, a rotary potentiometer slot to regulate the fan speeds, the back plate-based installation fittings for AMD and Intel systems including mounting instructions with German language edition, as well as a small bag of thermal compound for first use.

Technical key points

• Scythe Susanoo CPU cooler (SCSO-1000)
• Top-blow design with two separate radiator parts
• Aluminum plates, nickel plated copper base
• Dimensions maximum complete: 210 × 210 × 160 mm
• Plate number: 42 (large radiator), 26 (small radiator)
• Blade pitch just under 2 mm
• Zwölffach Ø6 mm heatpipe facilities
• Weight: 1,150 G (without fan), 1,575 grams complete
• Four 100 mm ventilation
  • 4 × Scythe slip stream fan (SY1025SL12LH)
  • 100 × 100 × 25 mm
  • Speed range: 500… 2,000 Rpm
  • All four fan airflow: 85,03… 340,14 m³/h
  • 4 Pin power supply connection via potentiometer, 3-pin without PWM per fan
  • Befesstigung on the heatsink with wire terminal
• Compatibility: AMD and Intel via back plate fitting
  • AMD 2.6.2002′UNDER, 2.6.2002′UNDER +, SOCKEL
  • Intel LGA 775, 1155, 1156, 1366
• Scythe manufacturer homepage
• Sales and price (EIA: 89.90 euro)

Cooler in detail

The Scythe Susanoo is no cooler that embodies the spirit of compromise. With its eerie dimensions it is one without a doubt the biggest processor coolers based air cooling, which could gain per market. In terms of radiator, a base area is covered by 210 × 210 mm. The overall height is 160 mm despite top-blow design and as a total weight of the Japanese “God of the wind” brings up impressive 1,575 grams that wage.

The Susanoo is a 38 × 38 mm copper base plate with absolutely flat and reflecting nickel plated heat absorption. Furthermore a relatively coarse-cut aluminum heat sink manufactured from a block presents itself with approximately 82 × 62 × 51 mm, (L × W × H) and its 16 plates is already larger than many HTPC-retail cooler.

A whole dozen of heatpipes has taken the scythe for the Susanoo into the hand. The 6 mm copies which swipe in two layers the heat absorption and to distribute the recorded by the CPU, thermal energy of the well-known vaporization-condensation principle as soon as possible to the two radiator parts. As in top-blow coolers, U Aufbiegung the heatpipes is not doing that.

Apart from the designated cooling block directly through the heat absorption, the scythe giant has two independent external parts of different sizes. The main radiator consists of 42 alloy blades 2-mm intervals and developed about 91 mm. The smaller secondary radiator is made of 26 units and towers above 119 mm, to avoid collisions with graphics cards. The gills of both radiators are attached only on the heat pipes and not soldered. However, the qualitative impression of the entire construction is very tidy and attractive quality.

Active ventilation is provided by four 100 mm fans of the scythe slip stream series. These are joined together using two small metal plates to a collective fixed three wire hanger on the fins of the heatsink.

The fans are not capable of PWM and only have a 3-pin connector. Scythe unified the power supply and regulation of the four fans but on a specially designed brackets system, which up to 2,000 rpm allows a manual adjustment of the fan speeds in the range of approximately 500. The Rotary potentiometer is this a 4-pin 12-V port directly connected to the power supply, while the speed signal practice a separate 3-pin connector is removed.

Mounting features

A cooling Ungetüm of the size and mass of Susanoo would be mounted course suitably and above all safe. This passes there is no way to a Union of the cooler with the motherboard using a back panel. However, some users have concerns about the security of their hardware under the weight of 1, 5 kg Kühlbrockens. In General, all-clear can be given however. If the system at rest is or is transported lying carefully, no problems, related to the stability of the motherboard, the base structure or of holding mechanism ‘.

Before the Susanoo but can take in the system space, some preparations must be made. Initially the matching bracket for the supported AMD or Intel socket are on the heatsink to install and to provide in which later the retaining PIN be screwed from below in the respective platform-dependent locations with nuts. This is especially when AMD systems out to ensure that the clip in the right places in the base of the cooler are screwed, because the Susanoo allows for merely a possible direction in the system.

In addition, is in demontiertem motherboard, the back panel is positioned accordingly, the referred retaining pin from the bottom threaded through rear-panel and the motherboard mounting holes and front by pulling small vacuum rubber rings.

Now can the cooler from above thin laminated CPU set up and the retaining pin in the nuts screwed on the with thermal compound. This one places on the main Board sets down, cleanly designed and carefully that at best the cooler on a level surface and screws using a cross screwdriver alternately until the point the four retaining PIN.

Because the Susanoo dominated also the graphics card, it is advisable for reasons of space, also reinstate it when upgraded motherboard. There could be especially compatibility issues in this context with graphics cards, which have cooling structures designed to very sweeping upwards.

Furthermore, it should be noted that by the size of the cooler also the screwing the motherboard in the case when the replacement is strongly complicated the boards-cooler graphics cards combination. In particular the medium screw series in the region of the graphics card is hardly accessible. For this purpose to remedy, Scythe sets in small plastic clips included, which replace the usual spacers and screws of Board of Mainboardschlittens in inaccessible places.

The entire Assembly process is little more challenging than a smaller processor cooler due to the size of the scythe chicory. With some caution and sensitivity is to master the task based on the regular and suggestive installation technology but without significant difficulty.

Test system

Clock of our current, real measurement platform is Intel’s core i7 920 “Bloomfield”. The popular quad-core CPU generated in standard mode (2.66 GHz, 1.2 volts V-core) according to the data sheet 130 Watts at full capacity and is the Intel Core at the level of our predecessor processor, 2 extreme minimum “Kentsfield” (2.66 GHZ, 1.35 volts V-core). Motherboard Intel’s DX58SO ‘Smackover’ used, we have also already presented in the report on the Intel Core i7 comes to fit.

As a suitable housing for the test mix in the closed, the ATX system Caseking with the Silverstone TJ-09S provides a spatially lush dimensioned base us. In addition to the generous space available, in particular the position of the power supply on the base is critical for fair test conditions, because of the fans of our 650 Watts strong Lian-Li-silent-force power supply there can have no with belüftende effect on the CPU cooler. To operate as single case fan with the scythe S-Flex 800 a silent 120 mm model back ausblasend and the CPU cooling in active and semi passiven test modes.

Thus, the most important cornerstones of the system, which presents itself as follows in the General Survey, are initially defined:

• Intel Core i7 920 “Bloomfield” (4 x 2.66 GHz)
• Intel DX58SO motherboard “Smackover”
• 3 x 2 GB DDR3-1066 OCZ Platinum XTC
• ASUS ATI Radeon X 850 XT (cooled by Zalman VF-900Cu)
• Lian Li silent force 650 power supply (with 140-mm ventilation)
• Silverstone TemJin SST TJ09S case (case fans: Scythe S-Flex 800)
• Samsung SpinPoint F1 HD322HJ HDD
• Thermal paste: Arctic Cooling MX-2
• Ambient temperature: 23 ° C

Respect! The temperature measurement results are sometimes quite strongly linked to the used test platform and can differ significantly depending on the configuration. You should only as orientation and rough tendency, not however be considered absolutely.

The volume measured in stand-alone mode, but of the respective cooler (the fan is powered by a passive adapter) in the 40-cm distance with a Voltcraft-320-sound level meter, which interprets the noise after the well-known A-rating curves in a range of 30 to 130 decibels. The basic volume of the measuring chamber with subjectively felt silence is 30.4 dB(A). Above this threshold, the sound emitted by the radiator can no longer resolve the gauge. Up to about 35 dB(A) can be assumed depending on the sensitivity of the user and frequency character of the sound that the fan noise when closed housing not or hardly to perceive are. From 40 dB(A) of our scale are to hear the very disturbing range starts from 50 dB(A) the noise significantly up very clearly.

In addition, we measured the wind speed produced by the fan with an anemometer and the maximum rate as an indicator of the volume flow rate specified. Information about the volume of air support generated by the fan can be gained from this value.

Test system and modes

To get a most meaningful picture of the cooling properties of subjects, we test the respective cooler in different CPU modes that address varied tasks to the respective products due to different clock rates and working voltages and Gehäusebelüftungsintensitäten. While the demands on a Retailkühler are relatively acceptable, for example, in “Standard mode”, just a few top cooler is able to withstand the requirements in the “performance”mode at low speed of active. The overview is supplemented by the “semi passive test”, which is the CPU fan disabled and only the ventilation help ensure that the single case fan at different speeds. The individual test modes are as follows:

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Apart from, based in analogy to our processor tests, to the utilization of the CPU on prime95, which continually leads in eight instances of the SmallFFT test to the highest heating load of the core i7 test CPU. Doing a warm-up period of 45 minutes is preceded to the thermal balance each approximately half-hour test run. In these the system temperatures are documented Everest by the diagnostic tool, which is used to evaluate the way of the core temperature maxima of the entire run.

The represented consumption indicated refer to the entire test system. The respective differences between CPU-load and-Leerlauf suggest it on the processor performance. Accordingly, the claim on the cooler in the performance mode to the part is immense.

Series ventilation

Scythe equips Susanoo, the cooler giant with four slip-stream fans combined to create a bond in the 100-mm format. The fans of our model operate over a speed range between 600 and 2100 rpm and be powered via 4-pin power supply connector. The regulation simultaneously via the firmly attached brackets potentiometer.

Already at the minimum speed of 600 rpm all fans run to easily. While the ensemble acts at first very quietly with only very light Klackern noise of the rotors in the background. From about 1200 RPM air noise joins tentative drive sounds primarily caused by airflow at high speeds. The fan Quartet is really disruptive only from about 1,600 rpm, because then the bright drive noise more increase and the noise of the air is very dominant. Until then, the four slip streams work surprisingly pleasant for minimal rubbing rotor noise.

Volume and sound pressure comparison

Our measurement indicate the subjective impression of the hearing. Despite the use of four fans is the scythe-combo at comparable speed of barely louder than a single, conventional 120 mm fan. In the assembled State, high, measured Centre are relatively intensively affected by the strong air envelopes, combined with slight vibration noise.

Overall, the sound pressure considerations justify the use of four smaller, but well matched for fans when compared to a single, large model.

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Usage note: by clicking on individual charts or cooler in the legend is the respective, functional course the diagrams highlighted.

Inaccuracies in the charts of this page result, in addition to the normal measurement tolerances, primarily from not precisely adjustable fan speeds (tolerance +/-30 R/min).

Speed and throughput

At the air outlet can measured air velocities, however, not with the larger fan models of 120 or 140 mm class compete. In this respect, a single Scythe slip stream with 100 mm edge length plays with not front. However, the quantity is crucial here again. As four fan be used, must be multiplied by the effective throughput according to, what gives the Susanoo on paper clear advantages.

On the basis of the air speed of air flow per hour depending on the speed can be estimated. A single 100 mm-Scythe-slip-stream fan with an outer radius of 4.8 cm and a rotor radius of 1.7 cm has a through-air area of 63.3 cm square. The result is at maximum speed of free-standing about 2,050 rpm and the measured 16.0 km/h air velocity (assumed it was homogeneous across the cross section area) an abgeschätzter airflow of 101,3 m³/h per fan. For all four fans, then, would be 405,2 m³/h at maximum speed record.

In the following comparison, only the data for a single fan are registered for reasons of comparability.

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Inaccuracies in the charts of this page result, in addition to the normal measurement tolerances, primarily from not precisely adjustable fan speeds (tolerance +/-30 R/min).

Cooling performance

Door of problems

Outside the housing, the scythe Susanoo looks like a potential cooling King, to spare no competition needs whether its enormous proportions. Built once in the housing, the promising cooler size quickly becomes the momentous event of a problem. Not only that due to the redevelopment of the first graphics card slots the accessibility of the pixel Accelerator limited is. Much more important the fact that the four fans of Susanoo due to the cooler height of 160 mm connect almost directly to the closed door of typical ATX cases. Even with generous, wide packages, the distance between the fans and the side wall is only a few centimetres. This spatial restriction generates a huge bottleneck for the air to durchströmende, which flows into two acute ergonomic disadvantages.

On the one hand the intake air at the passing of the bottlenecks must be, speeded up which leads to a considerably more intensive noise by reinforced air noise and fast-track drive. As an example we conducted a comparison of sound pressure with freestanding Susanoo, which even at a distance of about two centimeters to the rotating fans a cover in the form of the chassis side wall. The result is serious from speeds above the 1,000-U/min mark.

Also, much of the performance potential by obstructing the air intake evaporated so that the processor temperatures fail unexpectedly high.

To work around these problems, ideally using a Cabinet side wall that has suitable air intake cut-outs. Since hardly a chassis available on the market has such large side openings, handicraft themselves is in most cases.

Our test case, the Silverstone TJ09S, can come up with the necessary page openings. On closed side, the distance between the fans of Susanoo and the door is about three inches. In practice, this small distance is an absolute knockout criterion for the performance of the scythe giant, such as our small comparison with open and closed side in relation to a reference, the Noctua NH-D14, shows.

The Noctua NH-D14 loses about five Kelvin – a clear loss for closed housing. The Scythe Susanoo however, who can keep up with open case quite well with the Noctua Tower cooler, breaks literally a closed cabinet side wall. Our test processor core temperature rises to partially compared to open Setup 20 Kelvin, and more. Thus, the scythe giant from the perspective of the cooling performance is to the real problems in the traditional, closed ATX case.

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The temperature values of this page make the arithmetic mean of the four processor core temperatures under full load is.

Comparison with serial ventilation

Under these circumstances, the scythe Susanoo in our overview can achieve no good performance despite fan Quartet with series ventilation. A change or optimization of test setup within the meaning of the description of Susanoo would have made not possible a fair comparison we believe. So the scythe giant closed test housing must can certify a desolate cooling performance when compared to the significantly smaller competitors. Our comparison to the Noctua NH-D14 on the page has shown that it would have enough at open side door in reference to the best air coolers for a top ranking.

Also the possible argumentation, the Susanoo would have a clearly positive cooling effect on the surrounding components, on the motherboard chipset or graphics card by his generous ventilation, is very limited. Because due to the bad, blocked airflow in the housing is a significant increase in the indoor temperature (about five to ten Kelvin compared to a tower cooler Setup), which is affecting the temperatures of these peripherals. Effectively we could measure so no significantly lower Grafikkarten-or motherboard temperatures in the test, as some with a good Tower cooler. This is true this hardness of course only for housing with closed side wall. The Scythe Susanoo could achieve very much better results in terms of the with ventilation in similarly generous, side air intakes.

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Usage note: by clicking on individual charts or cooler in the legend is the respective course of temperature speed in the diagrams highlighted.

The temperature values of this page make the arithmetic mean of the four processor core temperatures under full load is.

Semi passive performance

All without leaving a trace, the scythe Susanoo not from the test would like to say goodbye to. Semi passive mode, in which no fans directly to the heat sink are mounted and instead only the case ventilation actively intervenes in the events, the Japanese giant cooler can present but still positive themselves. It remains questionable whether this special property but is enough to make the massive Susanoo for a broad buying public interesting.

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The temperature values of this page make the arithmetic mean of the four processor core temperatures under full load is.

Conclusion

Basically, we appreciate it very if manufacturers with their product creations want to stand out from the crowd of the market and promote courageous developments. Here, the experimentation ideally should lead to a product that has to offer certain advantages over the conventional competition. In the case of the Susanoo CPU cooler the risk appetite of the manufacturer in our view has not paid off. With its huge size and the high weight of the scythe cooler has first with numerous ergonomic disadvantages, such as about a highly complicated Assembly due to the low space or various compatibility constraints. Not the hoped, entschädigend strong cooling performance, which would be expected in the first viewing of cooler Riesens is the opposite, however. Rather, the shown performance comprehensively weak is average at best, even when used in unmodified, closed ATX cases despite four ventilation.

This time, Scythe has spanned the arc so. The concept with the quadruple ventilation system in the top-blow format seems reasonable this size for a marginally low receiving only. From the purchase of the cooling giant and otherwise invest almost 80 EUR, with which the scythe addition to record hits, remains the bottom line only.

Useful links

• Scythe manufacturer homepage
• Sales and price (EIA: 89.90 euro)
• Computer base radiator test system presented

Other recommendations

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  • Prolimatech Genesis (huge performance, huge dimensions, also top blow design)
  • Scythe Mugen 2 (high performance, versatile, very large)
  • Noctua NH-U12P (high performance, super package, quiet, somewhat pricey)
  • EKL Alpine foehn north face (for high speed operation, on AMD Sockets “correctly” can be mounted)
  • Noctua NH-D14 (active and passive performance, very good overall package, expensive and large)
  • Prolimatech super mega (active and passive performance, fanless, very expensive)
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  • Scythe Yasya (very high performance active, Tower cooler with good overall package)
  • Prolimatech Armageddon (delivered 120 and 140 mm fan, class quality, without fan)
  • Alpine foehn Matterhorn (high performance and good overall package)
• Top-to-blow cooler
  • Prolimatech Genesis (huge performance, huge dimensions, also Tower construction)
  • Noctua NH-C14 (double 140 mm cooler, very large and powerful)
  • Thermalright AXP-140 (low-profile for HTPCs suitable for 120 and 140 mm fan)
  • Noctua NH-C12P (high performance as a top-to-blow cooler, super package, somewhat pricey)