Artic Cooling 120x120x25/38

CedricFP · 01-18-2007, 06:18 AM

Are these fans any good at all?

120x120x38
+ 56.3 CFM / 94.7 m3/h
+ 23.5(A), 0.5 Sone
+ 1500 RPM
http://www.performance-pcs.com/catal...oducts_id=4163

120x120x25
+ 56.3 CFM / 95.7 m3/h
+ 24.5 dB(A), 0.6 Sone
+ 1500 RPM
http://www.performance-pcs.com/catal...oducts_id=4160

Why is it that the different thickness in fans have the same CFM (roughly) - I was always under the impression 38mm thick fans could out put a much higher air pressure (Sanyo Denkis, Deltas etc.)

Anyone have any first hand experience with these fans on a radiator? I can't get Yate Loons out here, and it's not worth my while to ship (particularly as I want quite a lot.)

Thanks for the info.

Graystar · 01-18-2007, 06:24 AM

pressure <> CFM

Think of pumps. A DDC has more pressure than many aquarium pumps that move 1000 gallons an hour.

CedricFP · 01-18-2007, 08:10 AM

Quote:

Originally Posted by Graystar

pressure <> CFM

Think of pumps. A DDC has more pressure than many aquarium pumps that move 1000 gallons an hour.

I see, so CFM is a measure of how much air gets moved.

So, would it be a safe assumption that the 38 MM AC fans have higher pressure, and therefore will perform better in various rads?

Fr3ak · 01-18-2007, 09:05 AM

I have about 5 of the 25mm ones, but they are very loud at 12V. At 7V they are ok, but dont push as much air as the yate loons I have.

I never tried them on a rad, so I cant tell performance numbers, but subjectiv the push way less air than the yate loons D12SL

Mord · 01-18-2007, 11:52 AM

I'm using the 38mm's - two of them. The setup is in my sig, and they handle very well the 24/7 rosetta@home "state". 940-960rpm are INAUDIABLE at 3a.m. Actually they are quite silent at 12V - 1500rpm too. But I'm a "silence freak" (can hear sounds up to 22kHz), so 950rpm is the sweetest spot for me.

The rad is a Golf2/AUDI heatercore, so it's VERY thick. No problem with that. Pump - 1.8m/800l/h, 8/10mm tubing (small & clean), copper blocks.

Complete results:
18 air (I'm having a cigarette and the balcony door is open

)
26,5 water
37 processor (full load)/ 38 Core temp
38 vga idle / 45 COD2 at max

Max temps were august after solid gaming:
34 air
38 water
43 processor (full load) / 49 Core temp
51-52 VGA / 60-62 again COD2 at max.

Hope that helps

Abyss

Fr3ak · 01-18-2007, 12:24 PM

Now that I think about it, I think I have an older version of those fans. Mine were rated at somewhat 28-30db at 12V, so forget what I posted above.

CedricFP · 01-18-2007, 08:22 PM

I see, so the consensus is that while not quite as CFM/DB attuned as the Yate Loons are, they still push a decent amount of air.

I'm planning on sticking these on an MCR220 or PA120.2.

serialk11r · 01-18-2007, 08:30 PM

They're nice fans, they have fluid dynamic bearings, not sleeve. However they are more expensive. Pressure is different from CFM. Its just like torque and speed for a car. If your car is going at only 50mph but you have it on low gear, it has way more torque and can handle much larger load and have better acceleration, but burns more fuel. A fan that is thicker will pump out more pressure ("torque") so it loses less cfms from restriction, such as a rad. They are louder and more powerful than thin fans. Oh and btw, I found quality defects in some of my Yate Loons (Jab-tech blue LED), such as broken LEDs, wires falling out, etc. However, they were a good deal

Vapor · 01-18-2007, 08:34 PM

Quote:

Originally Posted by CedricFP

I see, so CFM is a measure of how much air gets moved.

So, would it be a safe assumption that the 38 MM AC fans have higher pressure, and therefore will perform better in various rads?

Yes, this is largely a safe assumption....I have much data to back it up as well. The one exception is when a fan is designed to have very little pressure.

Anyway, I don't doubt the CFM ratings at all considering the 1500 RPM rating. However, I'd bet these are probably between 30dB and 33dB at 12V. I don't think the thicker one would be any quieter tbh, just better pressure (especially considering the exact same CFM/RPM ratings).

CedricFP · 01-18-2007, 08:57 PM

Well, here they are the same price. I think I'll just get the 38mm ones, they look pretty cool as well.

EDIT: These "fluid" bearings, I heard that they were breaking down quite regularly in other fans, getting stiff and such, even leaking (SilenX?)

Is there any substantiating to these reports?

SparkyJJO · 01-19-2007, 05:00 AM

My friend has an arctic cooling freezer 64 (not the pro) HSF that is several years old, it has a fluid bearing in it and it still works fine. Maybe AC knows how to make them and the other mfrs just made some crap copies of them

IanY · 01-19-2007, 07:21 AM

You would think that Yate Loons would save the universe from emminent disaster!

Your local Swiftech dealer should have the standard Swiftech-sold Delta fans (made in Guangdong). Those are rated at 34dB and are supposed to output 74 cfm. I don't trust any of those ratings, but the fans are very cheap ($6 in the US, like the Yate Loons) and work well. Running these at 7 volts make for a quiet computer, especially if you have a MCR320 or MCR220 radiator.

If you want to pay for quality, look at Panaflo or Sanyo Denki. If you really want to pay money, then I suggest looking at Pabst, which is my favorite.

serialk11r · 01-19-2007, 01:24 PM

These are quality fans, FDB is way more expensive than sleeve. I have to say but my Yate Loons are of lower quality than my thermaltake lol but they seem to work better...