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  #1  
Old 14-05-2010
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Join Date: May 2009
Posts: 1,611
Scythe Yasya CPU Cooler

Introduction:

The Japanese manufacturer Scythe introduced the new Scythe CPU cooler called Yasya. company recently produced a really high quality and high performance coolers for personal computers. Their products to me are getting bigger impression, viz. Reviews for Scythe Ninja 2 . Yasya is really hot news, yet you will not find even in stores and at the time of writing this review does not mention either the official website of the manufacturer. Just in time for CeBIT 2010 the Japanese set to now and present with a new potential yasya climbers in the 120-mm-Tower robe. Its unusual lamellar forms, six heat pipes and a special, different speed ranges-regulated PWM Slip Stream fans will help him. Whether the current leader of the Scythe yasya, Prolimatech Magahalems and Noctua NH-D14 can bring up a sweat, we want to find out in the usual manner.

The delivery of the new Scythe yasya are next to the sink a Scythe fan from the Slip Stream series in the 120-mm format, including backplates potentiometer for determining the PWM operating range, the mounting hardware for AMD (clamps) and Intel (Push pins), an installation manual with German language part and a small bag of thermal compound.


Description:

When unpacking, I was like a little child who sees the gleaming new toy. From the beginning I was impressed with unconventional design and light aluminum fins, and generally a nice treatment. Yasya no kid and has a size of 130 x 108.5 x 159 mm including 120 mm fan. His weight is 846 grams with fan. Aluminum fins are a total of 54 and their spacing is about 1.8 mm. Right on the box are several points listed technology, which has Yasya. It's as Trident Fin Mulit Layer Structure, which refers to the shape of aluminum fins and their arrangement, which optimizes heat transfer to the surrounding airflow. Unparallel Six Heatpipe Construction - ie, signs of heat-pipes layout - to be honest, so these names Only ear tuning, but none have revolutionary significance.


It has 2x6 mm heat-pipes on the outer diameter of 6 mm, which in turn intersect aluminum fins and surfaces with the processor. Copper heatsink base and is protected by galvanic nickel, which is beautifully shiny. Between the aluminum ribs and heat-pipes is a little "liability" as we know it from other models. End of the heat-pipes are unusually completed another type of cap, than it was as the second Ninja heatsink These are much higher (approx. 12 mm). As we shall see, the fan is attached to the standard steel strings, as we're used to. Before we look at the next chapter, so you can enjoy various details Cooler Scythe Yasya. Nickel-base is completely flat (in hundredths of a millimeter) and do not suffer from ailments type of concave surfaces.
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  #2  
Old 14-05-2010
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Join Date: May 2009
Posts: 1,611
Re: Scythe Yasya

Cooling Details:

With the yasya , Scythe has again come up with something and equips the novice on the basis of established Tower construction with very extravagant fins assembly. A total of 54 aluminum units form a jagged wave attack surface for impinging air. This Scythe hopes a more efficient inflow of air with no turbulence, so that despite the small distance between plates of about 1.5 millimeters, even at low speeds, yet good cooling performance can be achieved.

Six to one another slightly offset 6 mm heat pipes are in the usual U-bending up the foundation for the heat transport from the glossy nickel thin radiator. Their upper ends were fitted with stylish design to the total angular suitable heat pipe caps. A little extra heat sink on the base increases the effective cooling surface and gives the 850-gram Boliden a low center of gravity. In general, the Scythe yasya is very robust and presents itself on high quality level.

Due to the symmetrical basic shape up to two 120-mm fan on yasya be mounted. The attachment is effected by means of wire bars, which are the body and fins on the fan frame clamped. Unfortunately, these thin wires when yasya sit very tight and can therefore only be under greater strain with nerves of steel into place is not really comfortable. Here at the competition has, for example, Noctua NH-D14 , in some cases significantly smoother and more user-friendly solutions presented.

In addition to the unusual design of the plates series ventilation is one clear to the specificity of the yasya. Here Scythe uses a newly designed model of the slip-stream family, which permits on the basis of the attached backplate-rotary potentiometer motherboardseitige PWM-regulation in various speed ranges. Thus, the 120-mm fan works in the "low" position of the potentiometer in a PWM-range of soft 470 and 1340 rpm. With "High" setting will benefit users 740-1900 rpm at their expense. Of course, the areas can continuously between these extremes are chosen so that the customer can give the yasya a personally tailored to individual needs and control concept.


Accessories and Fan:

Although this is a new high-end cooler, so that you will not find many accessories. Base is 120 mm fan with SY1225SL s specified range of 470-1340 rpm. This range corresponded to reality, and I measured from 540 - 1380 rpm. Fan SY1225SL uses ordinary bearings. During testing, I have not seen any problem with their rustling or something similar. To about 800 RPM the fan is very quiet at the threshold point. The advantage of this fan is easy to control using a potentiometer, which is reinforced on the back of the PC boxes - the blinds. You can use the control on the motherboard instead of that potentiometer.

Also included is a manual, classic steel strings for attaching the fan, Grey Thermal grease and mounting clips. A pair of clips for Intel socket is completely versatile and for LGA 775, 1156, and 1366th The disadvantage is their low flexible strength. If you do not use push-pins (plastic pegs) and instead take advantage of the spring-bolt, so use caution when approaching sensitive - the buckle is very easy to bend. For high-end coolers I was expecting a slightly different mounting system than using push-pins. It is a pity that there is not a good back-plate panel, as it is a model for Orochi.


Installation:

If I ever wrote in a review that is easy to install and manage it to everyone, so in this type of cooler it is even easier. You need no screwdriver or other tools. Intel Socket to take two clips to a so-called push-pins (those plastic pegs) and plug it into the two pre-cuts the base of the cooler - there's just comfortable pushing it and you are done.

With only two systems to operate beyond all current and many past AMD and Intel sockets. Possible to make this the best bracket system for AMD's retention modules and variable diagonal push-pins for the symmetrical Intel platforms. Unfortunately, a free orientation is again given only for Intel, while AMD users are tied to the motherboard position of the base, which usually sets in most cases a little less powerful working direction of the cooler, respectively blowing direction of the fan to the housing cover or the graphics card.

The installation itself should take place because of the limited space available in upgraded motherboard. First, the heat sink without fan is placed on the CPU with thermal compound and coated according to the retention mechanism 'fixed. At the Intel push-pins signaled a clear clicking sound the safe seat of pins, while the AMD-parentheses their full contact pressure generated by moving two levers.


With a height of about 160 mm of the Scythe yasya does not fit in every case. Before buying you should therefore check on any incompatibilities.
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  #3  
Old 14-05-2010
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Join Date: May 2009
Posts: 1,611
Re: Scythe Yasya

Cooling Details:

With the yasya , Scythe has again come up with something and equips the novice on the basis of established Tower construction with very extravagant fins assembly. A total of 54 aluminum units form a jagged wave attack surface for impinging air. This Scythe hopes a more efficient inflow of air with no turbulence, so that despite the small distance between plates of about 1.5 millimeters, even at low speeds, yet good cooling performance can be achieved.

Six to one another slightly offset 6 mm heat pipes are in the usual U-bending up the foundation for the heat transport from the glossy nickel thin radiator. Their upper ends were fitted with stylish design to the total angular suitable heat pipe caps. A little extra heat sink on the base increases the effective cooling surface and gives the 850-gram Boliden a low center of gravity. In general, the Scythe yasya is very robust and presents itself on high quality level.

Due to the symmetrical basic shape up to two 120-mm fan on yasya be mounted. The attachment is effected by means of wire bars, which are the body and fins on the fan frame clamped. Unfortunately, these thin wires when yasya sit very tight and can therefore only be under greater strain with nerves of steel into place is not really comfortable. Here at the competition has, for example, Noctua NH-D14 , in some cases significantly smoother and more user-friendly solutions presented.

In addition to the unusual design of the plates series ventilation is one clear to the specificity of the yasya. Here Scythe uses a newly designed model of the slip-stream family, which permits on the basis of the attached backplate-rotary potentiometer motherboardseitige PWM-regulation in various speed ranges. Thus, the 120-mm fan works in the "low" position of the potentiometer in a PWM-range of soft 470 and 1340 rpm. With "High" setting will benefit users 740-1900 rpm at their expense. Of course, the areas can continuously between these extremes are chosen so that the customer can give the yasya a personally tailored to individual needs and control concept.


Accessories and Fan:

Although this is a new high-end cooler, so that you will not find many accessories. Base is 120 mm fan with SY1225SL s specified range of 470-1340 rpm. This range corresponded to reality, and I measured from 540 - 1380 rpm. Fan SY1225SL uses ordinary bearings. During testing, I have not seen any problem with their rustling or something similar. To about 800 RPM the fan is very quiet at the threshold point. The advantage of this fan is easy to control using a potentiometer, which is reinforced on the back of the PC boxes - the blinds. You can use the control on the motherboard instead of that potentiometer.

Also included is a manual, classic steel strings for attaching the fan, Grey Thermal grease and mounting clips. A pair of clips for Intel socket is completely versatile and for LGA 775, 1156, and 1366th The disadvantage is their low flexible strength. If you do not use push-pins (plastic pegs) and instead take advantage of the spring-bolt, so use caution when approaching sensitive - the buckle is very easy to bend. For high-end coolers I was expecting a slightly different mounting system than using push-pins. It is a pity that there is not a good back-plate panel, as it is a model for Orochi.


Installation:

If I ever wrote in a review that is easy to install and manage it to everyone, so in this type of cooler it is even easier. You need no screwdriver or other tools. Intel Socket to take two clips to a so-called push-pins (those plastic pegs) and plug it into the two pre-cuts the base of the cooler - there's just comfortable pushing it and you are done.

With only two systems to operate beyond all current and many past AMD and Intel sockets. Possible to make this the best bracket system for AMD's retention modules and variable diagonal push-pins for the symmetrical Intel platforms. Unfortunately, a free orientation is again given only for Intel, while AMD users are tied to the motherboard position of the base, which usually sets in most cases a little less powerful working direction of the cooler, respectively blowing direction of the fan to the housing cover or the graphics card.

The installation itself should take place because of the limited space available in upgraded motherboard. First, the heat sink without fan is placed on the CPU with thermal compound and coated according to the retention mechanism 'fixed. At the Intel push-pins signaled a clear clicking sound the safe seat of pins, while the AMD-parentheses their full contact pressure generated by moving two levers.


With a height of about 160 mm of the Scythe yasya does not fit in every case. Before buying you should therefore check on any incompatibilities.



Testing the System:

The popular quad-core CPU generated in standard mode (2.66 GHz, 1.2 Volt V-Core), according to data sheet is 130 watts at full capacity and thus on the level of our previous processor, the Intel Core 2 Extreme QX6700 "Kentsfield "(2.66 GHz, 1.35 volts V-Core). As Intel's motherboard is a fitting DX58SO "Smackover" is used, which we also already in the report for Intel Core i7 have presented. As a suitable housing for the test composition in a closed, standing ATX system Caseking provides us with the Silverstone TJ-09S , a spatially generously dimensioned basis.

In addition to the generous space available here is mainly the position of the power supply on the bottom crucial to a fair test conditions, because of the fans of our 650-watt Lian-Li Silent Force power supply can develop there effect on the CPU. So works as a single case fan with the Scythe S-Flex 800 is a soft 120-mm model, blowing out the back and supports the CPU cooling in the active and semi-passive test modes.

Thus, the most important cornerstones of the system, which appears in the general survey as follows, first outlined:
  • Intel Core i7 920 "Bloomfield" (4 x 2.66 GHz)
  • DX58SO Intel 'Smackover' Motherboard
  • 3 x 2GB OCZ DDR3-1066 Platinum XTC
  • Asus ATI Radeon X850 XT (cooled by Zalman VF-900Cu)
  • Lian Li Silent Force 650 power supply (with 140-mm-ventilation)
  • Silverstone Temjin SST-TJ09S case (Case Fan: Scythe S-Flex 800)
  • Samsung SpinPoint F1 HD322HJ HDD
  • Thermal compound: Arctic-Cooling MX-2
  • Room temperature: 23 C

The temperature measurement results are often quite strongly linked to the test platform used and can vary significantly depending on the configuration. You should only as a guide and gross tendency, however, are not regarded as absolute.

The measurement of the volume is made in the individual operation of each cooler (the fan is powered by a Passiveness) in 40-cm intervals with a Voltcraft-320 sound level meter that the noise emitted by the known A-weighting curves in the range 30-130 decibels interpreted. The basic volume of the measuring space in subjectively perceived silence is 30.4 dB (A). From this threshold, the noise emitted from the radiator no longer be resolved by the meter. Until about 35 dB (A) depending on the criticality of the user can and frequency character of the sound will be assumed that the fan noise in an enclosed housing respectively, are not nearly obscured. From 40 dB (A) of our scale are clearly heard the sounds to very clearly, from 50 dB (A) begins the very disturbing area.

Furthermore, we generated by the fan wind speeds measured with an anemometer and indicates the maximum speed as an indicator of the volume of throughput. From this value can be derived conclusions about the fan generated air flow rate.

System and Modes:

To get a meaningful picture of the possible cooling of the subject, we test the respective CPU coolers in various modes, the target due to different clock speeds and voltages and case ventilation work intensities manifold tasks to the respective products. For example, while in "Standard Mode", the demands on a relatively retail cooler are still acceptable, few top cooler can withstand the demands in "performance mode"l. Complemented the overview of the "Semipassiv test", in which disabled the CPU fan and the only ventilation assistance from the only case fan at different speeds is guaranteed. The individual test modes are as follows:


Away from which we draw, in analogy to our processor tests, the CPU load on Prime95 back, the instances of the SmallFFT tests running in the highest speed, the Core i7 CPU test leads eight. It goes every half-hour spin in advance to the thermal equilibrium a warm-up period of 45 minutes. In this system temperatures from Everest diagnostic tool to document, is being used to evaluate the average core temperature maximums over the entire test run.

The displayed data refers to consumption of the entire test system. The respective differences between CPU load and no-load can be closed to the processor performance. According to the claim to the cooler in the performance mode is partly immense.

Measured results:

As with previous measurements and here I used the supplied fan and measured in the range of 540-1380 rpm. Higher speed range can not be achieved. The maximum speed of the rotor is likely to limit the regulator - the difference may be at about 100 rpm. Scythe Yasya showed in really good light. Already the first graphs and figures show a large competitor most powerful heatsinks such as the Noctua NH-D14. In the first course is to see a relatively large dependence on speed. As a sensible line between efficiency and noise produced (rpm fan) I saw about 800 rpm.

Power consumption = 75W PTin body - this represents the input processors with a TDP of less value, for example, most dual-core processors. Because our coolers already significantly increased, to more complex ones I have made the comparison charts "click-able". If you are using a small screen resolution you'll have to open a new tab in your browser. Steeper characteristic Yasya cooler than the Ninja 2 shows a higher dependence on temperature of the air flow. At 780 rpm there is intersection between the condenser, where it reaches exactly the same effect. It therefore does not matter if you buy 2 or Ninja cooler Yasya if you run the fan to 780 rpm.

Totally different situation occurs at high fan speed, which is considerably more efficient Yasya and tread on the heels of giants such as NH-D14. Scythe Yasya doing very well indeed. Now it just depends what the price will be in the Czech Republic. There has unfortunately not known.
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  #4  
Old 14-05-2010
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Join Date: May 2009
Posts: 1,611
Re: Scythe Yasya

Fans and volume:

The series offers a fan of the Scythe yasya enormously wide speed range of about 470-1900 rpm. In the hot rod with a subjectively convincing generally very harmonious sound that even at high speeds is not noticeable negative drive by intrusive noise. Naturally dominate above the 1.200-U/min-Marke relatively intensive air handling noise. Under this level, the slip-stream counterparts but is working very pleasant and generates little noise to distract. min may under some 900 rpm to carry out a very low frequency light clacking of the rotor, through closed enclosure walls is, however, insist that in any case. Otherwise, the fan's operating proves almost silently and absolute Silent-Super-Silent-up capabilities at low speeds.

Metrological evaluation of series ventilation promotes two things to light. First, the fan in the rotation range below 1,000 rpm to be very quiet to evaluate virtually silent. At higher speeds, increasing the sound pressure, also because of the increasing turbulence of the air, quite strong.

The measured air speeds generated by the nine rotor blades of the fan slip-stream, are in the upper area of all specimens tested to date fan. Especially min 1,600 rpm Scythe fan of the series shall yasya again soared, suggesting that the design of the fan is optimized for high speeds.

Based on the air speeds, the air flow per hour can be estimated as a function of the speed. The 120-mm Scythe Slip Stream fan with an outer radius of 5.8 cm and a rotor radius of 2.0 cm of about 93.1 cm ?. This results in at maximum speed of about 1,900 detached rpm and measured 19.4 km / h air speed (assuming this was uniform over the cross-sectional area) estimated an air flow rate of 180.6 m / h (manufacturer: approximately 187 m? / h at maximum speed).

Total cooling capacity:

This curve characterizes the radiator in his absolute power and cooling is interesting is that it is an average power of 147W and 75W - closer it is described in the experiment . The value of thermal resistance is lower, the cooler is absolutely powerful. I would say that this course is the exact curve of the measurements. These are values that can be generally compared with values obtained by other test methods for different test configuration.

You can compare very easily the thermal resistance of water such as blocks and air coolers. It's a tremendous advantage because they still compare these two "rivals" was not possible. If you look at the recent reviews on the three water blocks, which were tested for body heat, so you will find that the value of thermal resistance of water moving blocks in the order of 0.095 ? C / W to 0.130 ? C / W, while cooler air reaching the lowest values about 0.210 ? C / W.

Series ventilation:

The best figure, and so it should be, the Scythe yasya do with the series airing of the manufacturer. At the same speed he shows with the slip-stream equipment such as a reduction to two Kelvin CPU temperatures, as with our reference fan. This fact propelled the Japanese in the confrontation a whole piece to the front, so that only Megahalems (with Scythe S-Flex equipment) and NH-D14 (with 140-mm central ventilation) is ventilated individually or deliver better results.

The heat-sink coolers are dismantled all the fans (if it is technically possible) and are only regulated speed and air flow inside the wind tunnel. This test will examine how much cooler is suitable for 'passive' uses (no fan) and what the air-flow (air flow) needed for efficient dissipation of heat to the surroundings. The test is performed only when the body PTin power = 75W. This is mainly because the higher thermal power body would handle a lot of air coolers.

I was very surprised how Scythe Yasya relatively universal and applicable for use with passive cooling mode. The results are not as good as the other coolers, eg Scythe Ninja 2, which is directly designed passive mode, but it certainly can not say that it is inappropriate Yasya. When tightening the heatsink for thermal paste, most of the body pushed from the center to the sides. Cooler at all independent measurements more or less sat on Wednesday. There is always the greatest heat flow.
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  #5  
Old 14-05-2010
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Join Date: May 2009
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Re: Scythe Yasya

Conclusion:

Scythe Yasya is among the most CPU coolers on the market. It's a very high quality and sophisticated product that is universally applicable and designed for passive cooling. Given relatively stagnant technological developments in the Tower for Scythe coolers it was certainly not easy, the large footprints left by a Mugen two successful with its overall package and its good performance to expand with a new development yet. By yasya one has yet managed to create a typical CPU cooler, which is quite versatile and has the potential to build on the popularity of the Mugen 2nd

For this assessment is characterized primarily responsible for the very good cooling performance in cooperation with the Series fan. Over a very wide speed range delivers the yasya low temperatures at high thermal stress. In his absolute strengths lie in the speed range above 1000 rpm, however, he breaks one not including excessive, so the user a very flexible cooler stands to the side of not only the Semipassiv, so one acting without directly at the heat sink fixed fan, so like to like.

The disadvantage of most of these products are push-pins (plastic pegs). Personally, I think that would have this High-end product deserved a better system for attaching. Also, what would be a bit soft vytknul mounting clips that are easy are full - it is such details that do not have too much influence on the function of cooler, but I have to take them into account.


Speaking of fans: With the special slip-stream standard equipment, the Japanese have created a further argument for yasya. With the help of a rotary potentiometer backplates-between 470 and 1900 imposing U / min roughly the speed range are determined to be worked in which PWM-controlled. Off course it is with an external fan control, the speed PWM without manually changed. In order of Scythe are nearly all tastes, served by tiptoe up to the performance enthusiasts.
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  #6  
Old 15-05-2010
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Join Date: Feb 2009
Posts: 240
Re: Scythe Yasya CPU Cooler

"Criticisms can be the one to the wire mounting bracket for the fan that sits still very tight and could be significantly shaped assembly-friendly fit, as well as to the nature of the base installation. The latter is indeed based on fewer components for a wide range of platforms solve engineering techniques quite clever, in view of more than 800 grams, many Intel users but one screw to the motherboard back plate solution, AMD-owner a wish on their motherboards ideally be oriented form of installation.

Apart from these qualities of character with the Scythe has refills yasya a really very good, qualitatively better CPU in a harmonious overall package which can reap also thanks to the fair pricing of our Computer-base recommendation. "
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