Scythe Grand Flex 120 mm Fan Series Detailed

[btarunr]

Japanese PC cooling expert Scythe unveiled its brand new high-performance PC fan series, the Grand Flex. The company started off with its 28 mm-thick 120 mm variants, among which are four fixed-speed variants, including the Grand Flex 800 RPM (SM1225GF12SL), 1,200 RPM (SM1225GF12L), 1,600 RPM (SM1225GF12M), and 2,000 RPM (SM1225GF12H). All four of these feature 3-pin connectors. Scythe also unveiled the Grand Flex PWM (SM1225GF12SH-P), which spins at 600 to 2,500 RPM, and features 4-pin PWM fan control.

The Grand Flex series feature a unique new impeller design that maximizes air-flow at the given speeds, resulting in good airflow-to-noise ratios. The 800 RPM variant pushes 30.5 CFM at 18 dBA noise output; the 1,200 RPM variant does 45.8 CFM at 23.5 dBA; the 1,600 RPM does 61.1 CFM at 28.5 dBA; and the 2,000 RPM variant pushes 76.6 CFM at 34.5 dBA. The Grand Flex PWM pushes 24.2 to 98.6 CFM, with a noise output ranging between 13.5 to 39.5 dBA. Its head features fluid-dynamic bearing, with a lubricant that can withstand temperatures as high as 250°C. Scythe didn't release pricing, but announced it would begin shipping these fans by July 3.



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[m1dg3t]

Interesting blade design! The "extra" 3mm in depth should give a boost to static pressure

Would be nice to see a small hub in use on these in order to facillitate larger blades

 

[LAN_deRf_HA]

I wonder if these are going to be positioned to replace GTs.

 

[m1dg3t]

I wonder if these are going to be positioned to replace GTs.

Think it's safe to say no.

 

[chodaboy19]

Do I need to replace all my GTs now???

 

[FreedomEclipse]

Do I need to replace all my GTs now???

imo corsair SP series push more air compared to the GTs but are slightly more noisier when running at high rpm, they tend to emit a really high pitched whine. at 70% rpm when the noise is more acceptable, they push more air then the GTs

:EDIT:

as for scythe - they really need to bring back their 2150rpm GTs because the next step up is 3000rpm. and theres nothing to cover the gap between 1850-3000rpm

 

[Animalpak]

Hope they perform well with radiators too

 

[LAN_deRf_HA]

Think it's safe to say no.

Well think about it. Any company would rather have their own design over importing and rebadging someone elses fans if given a choice. They have hardly any control over their top products. Stock levels are still spotty on GTs, they can't order them in any new variety like pwm or quieter FDB bearings, and they have to charge more because they're not optimized for this non-industrial application.

If they one up or match the GTs for less money eventually everyone will buy them and they can drop the GTs.

 

[EarlZ]

imo corsair SP series push more air compared to the GTs but are slightly more noisier when running at high rpm, they tend to emit a really high pitched whine. at 70% rpm when the noise is more acceptable, they push more air then the GTs

:EDIT:

as for scythe - they really need to bring back their 2150rpm GTs because the next step up is 3000rpm. and theres nothing to cover the gap between 1850-3000rpm

Can we get links to back these up ?

 

[FreedomEclipse]

Can we get links to back these up ?

Static pressure rating for Gentle Typhoon AP-15 - read the thread

If you spend a little time googling you will see quite a few sites have managed to calculate the results based on the rather vague/complicated specs given by Nidec Servo Corporation and come up with an actual result that people understand.

There are a few sites that quote AP-15's to have 3.09mmH2o but most sites quote 2.05mmH2o.

Corsair SP120's do 3.1mmH2o @100% RPM

the AP-15's however are the best when it comes to balancing sound & performance though some folks here dont care for them as they find the noise it creates (im guessing some sort of whine) unbearable.

I dont have these problems however, obviously i can hear a slight 'whurrrrring' sound when the fan is active but nothing even close to the higher pitched sound of the Corsair SP120 which can resonate with the case

::EDIT::

Heres the actual formula for the static pressure calculation

the actual static pressure is actually 2.02mmH2o

 

[mastrdrver]

Can we get links to back these up ?

AP-15 on rad
SP120-HP on rad

The Scythe is clearly quieter at full speed while giving slightly less airflow. At the same noise levels, the Scythe pushes 50% more air then the Corsair.

 

[nodata]

WooOOOO

http://www.youtube.com/watch?v=2fSsOphBcuM