New Scythe 120mm fans - just announced

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Felger Carbon
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New Scythe 120mm fans - just announced

Post by Felger Carbon » Wed Oct 10, 2007 7:25 pm

Here.

How about a 1000RPM 38mm fan for that new humongous Thermalright?

How about 5 different speeds of a new 9-blade fan, including a 500RPM model?

Take a look at the link above.

ronrem
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Post by ronrem » Wed Oct 10, 2007 8:34 pm

The smaller hub seems to allow a bit more airflow than normal for a low rpm,and 500 rpm without extra $ / hassle to undervolt is also REAL neat.

Note the CFM on the 800 rpm. It's about what you usually get from 1000-1200 rpm. There's no details on the "sleeve bearing",and there's quite a range of quality-durability-silence possible. Here--at worst,Scythe does their R+D so I'd expect above average bearing quality. The small hub CAN mean the bearing area is minimal and that could be bad. It also could mean even less noise if it's precision stuff.

Nothing I'd plan on building would need the thicker 38 mm 120...but with folks overclocking Quads....then wanting it quiet too.....that 1000 rpm really might be the top choice.

Now....If Scythe would do a 180/200 mm like the Antec Big Boy with an undersize hub and the S Flex bearings........Oooooh :shock:

Felger Carbon
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Post by Felger Carbon » Wed Oct 10, 2007 10:23 pm

ronrem wrote:Note the CFM on the 800 rpm. It's about what you usually get from 1000-1200 rpm.
Considering the fan's a 120mm x 25mm, methinks the CFM number is a wee bit overstated. :oops:

gb115b
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Post by gb115b » Thu Oct 11, 2007 1:59 am

this is the only site that i trust for fan reviews...so i'll wait till mike gets some figures together

never trust manufacturer specs.

thejamppa
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Post by thejamppa » Thu Oct 11, 2007 2:38 am

hmmm that Ultra-Kaze 120x38 1000 RPM seems nice ^^

Ultra-Kaze 1000 RPM + TR SI-128SE? Could that be match made in heavens?

NeilBlanchard
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Post by NeilBlanchard » Thu Oct 11, 2007 5:08 am

Hello,

May I suggest requesting that your favorite vendor start selling them?

Image

[Edit: Here's New Egg's product request page: https://secure.newegg.com/NewVersion/Fe ... eCarry.asp]
Last edited by NeilBlanchard on Thu Oct 11, 2007 8:49 am, edited 1 time in total.

thejamppa
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Post by thejamppa » Thu Oct 11, 2007 6:08 am

NeilBlanchard wrote:Hello,

May I suggest requesting that your favorite vendor start selling them?

http://www.scythe-usa.com/product/acc/0 ... etail.html
Good idea. I am sure they still take them, as they have nearly every scythe product in their catalogue. Latest addition were Kama-PMW fans ^^

Felger Carbon
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Post by Felger Carbon » Thu Oct 11, 2007 12:27 pm

The 38mm fans are already available on eBay. No sign of the 9-blade fans yet (Google).

mrinsane19
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Post by mrinsane19 » Thu Oct 11, 2007 12:50 pm

Oh I like that 800RPM... even if the noise readings are (obviously) understated... 9 blades deals with alot of backpressure ;) Tuniq here we come.

jaganath
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Post by jaganath » Thu Oct 11, 2007 1:23 pm

9 blades deals with alot of backpressure
if it's static pressure you want you should choose the Ultra Kaze (who makes up these names? :lol: ), 38mm deep. the 9 blade version won't actually provide a lot of backpressure, because of the large spaces between the blades.

Felger Carbon
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Post by Felger Carbon » Fri Oct 12, 2007 1:07 pm

Aerocooler is selling the 9-blade models for $8.75. I ordered the 500 and 800 RPM models to evaluate. We'll see how fast US Priority Mail gets them here - two days, two weeks, or two months. :lol:

Availability sez "ships in two business days", which is not the same as "in stock".

Redzo
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Post by Redzo » Fri Oct 12, 2007 2:29 pm

Why not any PWM versions ?

LuckyNV
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Post by LuckyNV » Fri Oct 12, 2007 3:40 pm

jaganath wrote:
9 blades deals with alot of backpressure
if it's static pressure you want you should choose the Ultra Kaze (who makes up these names? :lol: ), 38mm deep. the 9 blade version won't actually provide a lot of backpressure, because of the large spaces between the blades.
Tuniq only fits 25mm thick fans

Felger Carbon
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Post by Felger Carbon » Fri Oct 12, 2007 7:11 pm

LuckyNV wrote:Tuniq only fits 25mm thick fans
MrInsane is the one who mentioned Tuniq, and he didn't mention the 38mm. Jaganath, who did mention the 38mm, did not mention Tuniq.

I'm the guy who said that the 38mm 1000RPM version was a good SPCR fit for Thermalright's latest Brobdingnagian montrosity, which does have room for a 38mm fan between the two sets of cooling fins. :D

tdotcbc84
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Post by tdotcbc84 » Sat Oct 13, 2007 8:15 am

what does static pressure mean ?

compared to what other kind of pressure ?

Fungi
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Post by Fungi » Sat Oct 13, 2007 4:10 pm

I'm seeing a lot of positive reviews on the KAZE-JYUNI series fans in the lower RPM models on Japanese message boards. Quiet, pushes good air, but the only concern is lifespan. But for fans this price, I'd assume switching them out is the best thing to do anyway instead of looking for something with a longer life span.

CountChoculaBot
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Post by CountChoculaBot » Sat Oct 13, 2007 5:37 pm

So... any word on the new 120x25's vs Minebea's?

And any predictions on whether a 2000RPM 120x38 Scythe or a 2100RPM Panaflo 120x38 run at 2000RPM will be quieter?

nightmorph
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Post by nightmorph » Sun Oct 14, 2007 1:02 am

gb115b wrote:this is the only site that i trust for fan reviews...so i'll wait till mike gets some figures together

never trust manufacturer specs.
Indeed. According to Scythe, the slowest of the five fans (500rpm) produces only 7.5 dBA. Gosh, their anechoic testing chamber must be located on the moon! Just imagine how much quieter it would be when paired with a fan controller . . . negative dBA? :D

jaganath
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Post by jaganath » Sun Oct 14, 2007 1:07 am

tdotcbc84 wrote:what does static pressure mean ?

compared to what other kind of pressure ?
http://en.wikipedia.org/wiki/Static_pressure

we use static pressure to mean the pressure required to force airflow around obstacles in the airflow's path (ie overcome backpressure) which may not be scientifically correct, but all the fan makers use the term in that way as well, so...

Bluefront
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Post by Bluefront » Sun Oct 14, 2007 2:46 am

I have never used the term "static pressure" in any situation. It's meaning is too vague.

Fans deal with two problems.....back-pressure, like blowing a fan against a wall. The closer to the wall you get, the harder it is to maintain the same airflow, the CFM from the fan decreases, and the fan gets more noisy.

The second effect.......resistance to airflow on the intake side of the fan, like trying to suck air through a clogged intake filter. Not the same as back-pressure, but with similar results to the airflow.

Which is worse to the airflow from a computer fan......IMHO back-pressure. Try it yourself.....put a foam air filter in front of a fan, then behind the fan. Trying to blow through the filter (back pressure) reduces the airflow much more than sucking through the filter. That's why stand-alone air filter units almost always suck through the filter. :D

miahallen
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Post by miahallen » Thu Oct 18, 2007 2:20 am

Felger Carbon wrote:Aerocooler is selling the 9-blade models for $8.75. I ordered the 500 and 800 RPM models to evaluate. We'll see how fast US Priority Mail gets them here - two days, two weeks, or two months. :lol:

Availability sez "ships in two business days", which is not the same as "in stock".
Did you ever get them? What do you think? Thanks!

Felger Carbon
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Post by Felger Carbon » Thu Oct 18, 2007 8:25 am

miahallen wrote:Did you ever get them?
Not yet, but Aerocooler claims they shipped by USPS (snail mail) earlier this week. :?

CountChoculaBot
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Post by CountChoculaBot » Thu Oct 18, 2007 2:28 pm

All models are up on jab-tech now.
http://www.jab-tech.com/120mm-Fans-c-81-p-2.html

Also, still any word on Minebea vs the new ones? And how much better would a 120x38mm fan do on a Ultra 120 Extreme than a regular 120x25?

Felger Carbon
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Post by Felger Carbon » Thu Oct 18, 2007 5:30 pm

A quick report on a couple of Scythe fans:

First, the 9-blade 120mm 500RPM nominal fan: at 12V I measure 536RPM; the fan starts (at the ragged edge) at 7.7V. At 3" and 12V I measured 30.0dBA; ambient was 28.6dBA. This was at 5:30 to 6PM in the front room with lotsa people headed home. This tells me the fan was ~24dBA at 3 inches, 12V, 536RPM.

I was mostly interested in the 3500RPM nominal 40mm Scythe fan; I got two of them for use as spot coolers on 2.5" HDDs. I tested one: 3218RPM at 12V, 1163RPM at 5.5V, 5V start (and run). I measured 44.3dBA at 12V and 3", ambient 29.3dBA. I compared it to a GW NCB 80mm fan at 12V and 3": 39.9dBA. My SLM sez the NCB is 4.4dBA quieter at 3". This is interesting, because my ear sez the 40mm fan is quieter than the 80mm. Significantly quieter. I think I'm gonna put that SLM on report... ;-)

Math sez the 40mm's 12V to 5.5V RPM span covers a 26.5dBA noise spread. Naturally, at 5.5V you don't get much cooling air...

Keep in mind I'm at 4100' altitude here in KF. Fans turn a little faster.

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Post by NeilBlanchard » Thu Oct 18, 2007 8:19 pm

Hello FC,
Felger Carbon wrote:First, the 9-blade 120mm 500RPM nominal fan: at 12V I measure 536RPM; the fan starts (at the ragged edge) at 7.7V. At 3" and 12V I measured 30.0dBA; ambient was 28.6dBA. This was at 5:30 to 6PM in the front room with lotsa people headed home. This tells me the fan was ~24dBA at 3 inches, 12V, 536RPM.
...but how does it sound?

Felger Carbon
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Post by Felger Carbon » Thu Oct 18, 2007 9:25 pm

NeilBlanchard wrote:...but how does it sound?
At 10:20PM, much quieter ambient. At 12V, 6" from my ear, there's no sound that I can detect. At 12V, 1" from my ear, I hear subdued motor noise and blade noise, no whoosh or bearing noise. This thing just doesn't make much noise at all. We're talking 536RPM here. :?

edit: added comment on bearing noise

merlin
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Post by merlin » Fri Oct 19, 2007 12:35 am

Sad that all of these are sleeve bearing. I'd love to see more fans using the sony fluid bearing or other longer lasting technology. (And also horizontal safe bearings!)

gmat
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Post by gmat » Fri Oct 19, 2007 4:33 am

The Ultra Kaze 120x38mm 1000rpm looks a lot promising, especially for watercooling (static pressure from radiator is a big problem). I'm ordering two right now ! I'm curious to hear how they fare against the Papst 4412 F2GL (which honestly is still fan perfection incarnate), and against their own line of FDB S-Flex fans (i have the 1200 rpm ones).

NeilBlanchard
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Post by NeilBlanchard » Fri Oct 19, 2007 9:13 am

Greetings,
merlin wrote:Sad that all of these are sleeve bearing. I'd love to see more fans using the sony fluid bearing or other longer lasting technology. (And also horizontal safe bearings!)
What you say is probably true for some sleeve bearings, but I think it is not true for all sleeve bearings. Well designed and well made sleeve bearings are fine for longevity, in any orientation, and they can be quieter than (lousy) ball bearings, too. And just because a fan uses a ball bearing doesn't mean it won't wear out quickly and/or have orientation issues...I think you get my point!

Back on topic: FC, they seem to be very quiet fans! How's the subjective air flow vs say a 500RPM GlobalWin NCB?

Felger Carbon
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Post by Felger Carbon » Fri Oct 19, 2007 10:39 am

NeilBlanchard wrote:FC, they seem to be very quiet fans! How's the subjective air flow vs say a 500RPM GlobalWin NCB?
Your slightest wish is my command, master! :D I plugged the 800RPM 9-blade Scythe into 12V, and adjusted a GW NCB for similar airflow as determined by my precision face CFM sensors. There is a huge difference in fan noise (whoosh excepted; the whoosh is the same). The Scythe is not just lower in noise, but spectacularly lower in noise (again, whoosh excepted).

The Scythe also has a spectacularly higher blade pitch than the NCB, which itself is higher pitch than the Nexus/YL fan. We have a 9-blade rerun of the Noctua fans here: in low back-pressure situations (such as the test I did a few minutes ago) the new Scythes will perform very very well. Put them in a crowded case or similar constricted airflow situation, and they'll perform less well IMHO. Just how less well? We'll need several reports from SPCR readers to get a handle on that.

But if you want a quiet hand-held fan, these new 9-blade fans are the cat's pajamas. 8)

Who knows? We might all get lucky and these fans (with 9 blades to the Noctua's 7) might work well in tight situations. My bet is no. :(

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