Would anyone have information about 120x120x25 mm case fans running on 240V AC, with atleast 100cfm airflow? The best I found at 25mm thickness was rated at 80cfm. I found many at 38mm thickness, which due to space restriction in my case, cannot be used. I plan to replace my 12V DC fans which are only 35cfm. DC fans at higher cfm are too loud.

Also, due to my own dumbness, I managed to break the fan fins on my Asus GTX 660, and one of the fans on my Gigabyte GTX 650Ti is jammed. Any suggestions for replacement fans which will stay within two slot widths?

Quite a few 120x120x25 230vAC fans with <100m3/h
First one I came across - Sunon SP101AT-1122HSL.GN flow of ~136m3/h

As for you GPU fans - what diameter and depth can you get away with?

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Bob Smith
Member of Seti PIPPS (Pluto is a Planet Protest Society)
Somewhere in the (un)known Universe?

Quite a few 120x120x25 230vAC fans with <100m3/h
First one I came across - Sunon SP101AT-1122HSL.GN flow of ~136m3/h

As for you GPU fans - what diameter and depth can you get away with?

Thanks, however, 1122HSL.GN is rated at 78cfm. As for the GPU fans, I haven't measured the dimensions. The current thickness is two slot wide, and hence the same is required, else it will touch the PSU. Diameter wise, it should lie within the edges of the GPU itself.

What is "loud" for your ears ?

Why should 240V AC fans be less noisy at the same size ?


Have you tried something like this one :
http://www.alphacool.com/product_info.php/info/p1532_Alphacool-Susurro-Fan---120---Black---Blue-Edition---1700rpm---120x120x25mm--.html?language=en

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U r s

Would anyone have information about 120x120x25 mm case fans running on 240V AC, with atleast 100cfm airflow? The best I found at 25mm thickness was rated at 80cfm. I found many at 38mm thickness, which due to space restriction in my case, cannot be used. I plan to replace my 12V DC fans which are only 35cfm. DC fans at higher cfm are too loud.

Also, due to my own dumbness, I managed to break the fan fins on my Asus GTX 660, and one of the fans on my Gigabyte GTX 650Ti is jammed. Any suggestions for replacement fans which will stay within two slot widths?

The noise level depends on how the fan is designed to move air. Or more specifically the fan blade design. Not the fan power source. You can get high volume case fans that are considered "silent".
http://www.newegg.com/Product/Product.aspx?Item=N82E16835150124
That fan is only about 81cfm, but it is also rated at 25 dBA for noise. As I recall anything under 30 dBA is considered "silent" in the computer industry.

If you want 120x25mm with a cfm =>100 & silent I'm not sure that exists. Between 25mm, 100cfm & silent I would say pick the two that you really care about.

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SETI@home classic workunits: 93,865 CPU time: 863,447 hours
Join the [url=http://tinyurl.com/8y46zvu]BP6/VP6 User Group[

1) Don't trust manufacturers specs

2) 240v AC direct for a case fan? Why do you need AC when your power supply gives you a nice 12v DC source? Or are you just saying your computer is connected to 240v ? In this case your power supply would handle the conversion just fine and still give you 12v DC at your molex or fan plug.

3) For a fan comparision, sadly martin has let his domain lapse, but just browse here.

https://web.archive.org/web/20150214110616/http://martinsliquidlab.org/2013/05/07/fan-testing-round-12/

Another good maker of very high CFM fans is delta, there are high noise levels to go with them, but on a noise/CFM basis when you need a high CFM they do quite well.

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I had a couple of dc computer fans that would not spin. I thought they got gummed up or something. I was about to throw them away when I found post where a person was telling another person to lift the sticker on the hub of the fan and drop a few drops of lubricating fluid in there. I did that and the fans are not stuck anymore. Now I have a couple more perfectly well functioning dc fans.

That might be the case for your 650ti. If I understood your statement correctly.

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Replaced my CPU cooler and had a space issue with a case fan. The case had a couple of radiator hose holes. So I moved the case fan to the outside of the case and rerouted the fan wires through there.

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Are fans supposed to be without motors or engines on their own?

I have nothing to compare with myself.

The previous nVidia GTX 480 as well as the other GTX 680 card lies on the shelf and I hesitate removing any cover since both cards should be working.

I had a couple of dc computer fans that would not spin. I thought they got gummed up or something. I was about to throw them away when I found post where a person was telling another person to lift the sticker on the hub of the fan and drop a few drops of lubricating fluid in there. I did that and the fans are not stuck anymore. Now I have a couple more perfectly well functioning dc fans.

That might be the case for your 650ti. If I understood your statement correctly.

It may possibly have been me that mentioned that at some point, but I know I'm not the only one that knows this trick and does it on a regular basis. I just know I've mentioned it on here a few times.

Carefully peel the sticker using a razor blade, there may or may not be some kind of rubber/plastic sealing plug under the sticker. Personally, I add a drop or three of new or used 10w-40 motor oil (yes, like for your car) in there, clean the sticker surface so the sticker will stick and hold again, put it back together, spin it by hand in both directions a few times, and plug it in. Should come back to life without rattling.

My 120mm rear case fan should have died and been replaced five years ago, but every ~2 years or so, it starts making noise again, so I add another two drops of motor oil to it, and it keeps going. Dual ball bearing fans can take a bit of a beating and keep going. Sleeve bearings have a short window to be saved once they start making noises. I have saved sleeve bearing fans before, but they tend to either continue rattling after making noises, or start rattling again anywhere from the next day to 3 months later.

It's worth a shot. I took my 8800GT apart about 6 months ago and cleaned the heatsink off and put Arctic Silver 5 on there and oiled the fan, even though I wasn't having any issues with heat or the fan... I just figured being 9 years old now.. it was probably due for some attention. I did end up dropping 3C for idle (down to 55C from 58) and after 30 minutes of rendering a game on 1920x1080 with 16x AA, it maxes out at 71C instead of 84. So.. that helped.

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Linux laptop:
record uptime: 1511d 20h 19m (ended due to the power brick giving-up)

You can actually wash a 12V dc fan.(do not do that with a mains powered fan).
Soak it in warm soap water and spin it by hand a bit in the water to get all the air out.

Rinse it a few times with clean water.
Dry it thoroughly.( maybe use compressed air or a vacuum hose to spin it dry).

Plug it in and let it run for half an hour (outside the case, if you can)

Works very well. Then, after a few days of use, put some oil on it and it is as good as new.

It is not just the lack of oil, but the dirt buildup, that makes the bearings sticky.

Thanks for all the tips. I tried peeling off the sticker and oiling the stuck fan on my GPU and it now rotates intermittently. I guess a few more tries will free it up.

I have never heard of washing the DC fans, but maybe I will give it a try if the lubricating method doesn't work.

However, with GTX660, I will still need a new set of fans as one of the blades is completely broken now and the imbalance creates a too much vibration at high speeds. I could not find the same type replacement on the net, and the entire setup has to be two slot wide.

My case has a total of 6 fans and the combined whine is a bit too much especially at night. All of them came with the case and their data specs put them on an average of 51dB. I work with case fans used on electrical DBs, which while pushing more air are much quieter at around 39dB. Hence the thought of replacing the 12V DC with these ones. I will not be changing the CPU radiator fans rated at 110cfm. So the new fans need to be in similar range so as not to create pressure difference inside the case.

Vipin,

Did you check eBay?

http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2053587.m570.l1313.TR0.TRC0.H0.Xfans+for+Asus+GTX+660.TRS0&_nkw=fans+for+Asus+GTX+660&_sacat=0

Vipin,

Did you check eBay?

http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2053587.m570.l1313.TR0.TRC0.H0.Xfans+for+Asus+GTX+660.TRS0&_nkw=fans+for+Asus+GTX+660&_sacat=0

Thats neat, thanks a lot. I never used ebay before but must give it a try now.

If you're considering using AC fans in your case, I would be remiss not to point out these links:

http://www.dansdata.com/hx45fan.htm
https://web.archive.org/web/20081205152808/http://www.cheek.org/tech/004.htm

I personally modded 3 cases over the years to use AC fans. It can work wonders in certain configurations. Then I got lazy and just started cutting holes in side panels right over CPU/GPU positions and mounting a 120mm plain DC fan there.

This thread reminded me that it was time to blow out some dust bunnies. When I didn't see any improved temps on one computer, I looked again and saw that an old GeForce 9800 GT was reporting zero (0) fan RPM. It's a good thing I had installed TThrottle when I recently got back into crunching or it probably would have melted. TThrottle has been keeping the GPU running at about 50%, apparently. I know I really should take it out of service until I get around to repairing/replacing the fan or perhaps the whole GPU, but the system seems to be running just fine...

And the system crashed while I was typing that. I should take that as a sign, instead of just lowering the temp limits on TThrottle and trying again...

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<img src=\"http://boinc.mundayweb.com/seti2/stats.php?userID=1179\">

I just ordered a couple of 80mm fans from Newegg. Bgears b-Blaster 80, 80mm Case Fan, 62CFM/39DBA, about $9 apiece. They got good reviews although they made be a tad loud. 39DBA is a bit louder than your average office environment, so they say. They haven't worked in my office. I am stuck with the fan size and location because of my case, a Silverstone HTPC case. Being a full 35CFM beyond my stock fans, I should be able to use my rig at full clock. Currently an FX-8350 and 2, R9 280Xs (clocked back to 950 from 1030mhz). Check around, between Newegg, TigerDirect, and E-bay, you should be able to find just about anything you need.

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I scored a half dozen of my favorite 120x38mm high flow fan on ebay.
Not incredibly noisy, given their airflow. Not quiet either..LOL. But 133CFM for a 120x38mm fan is extremely good.

And these things are re-oilable, and I have many here that have been running 24/7 for many years with a couple of drops of oil once or twice a year by peeling the label off and popping out the little rubber button over the bearing. Put the button back in and you're off and running again.

Just thought I would get some spares before it is NLA.

Kitty tested, kitty approved!

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"Freedom is just Chaos, with better lighting." Alan Dean Foster

Another thing to consider, a lot of cheap fans say "ball bearing" on the sticker, but I've taken a few seized ones apart, and there hasn't been a ball bearing in sight. Cheaper sleeve bearings, with a sticker over the top.

But there are all sorts of fans available.

The usual cheap, fast, good - Pick any 2, applies of course.

Heck I've got an old Intel server fan around some place, 12 V abut rated for ~30 watts. I'm keeping it in case the kids want to build a toy hovercraft. You don't want to be working in the same room as that sucker when it's spun up to max.

And as for oiling fans, yes it can get a bit more life out of them. But realistically, buying a new fan and forgetting about it for another 5 years is probably more practical.

I just ordered a couple of 80mm fans from Newegg. Bgears b-Blaster 80, 80mm Case Fan, 62CFM/39DBA, about $9 apiece. They got good reviews although they may be a tad loud. 39DBA is a bit louder than your average office environment, so they say. They haven't worked in my office. I am stuck with the fan size and location because of my case, a Silverstone HTPC case. Being a full 35CFM beyond my stock fans, I should be able to use my rig at full clock. Currently an FX-8350 and 2, R9 280Xs (clocked back to 950 from 1030mhz). Check around, between Newegg, TigerDirect, and E-bay, you should be able to find just about anything you need.

Just installed the new fans...39dba? Really don't notice them. Now all I need is some WUs to try them out.

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Thanks for the links Troy. I had been pondering over the idea of installing the AC fans and got my hands on two spare fans that were purchased for chiller DDC panels, however, lack of time and in view of most of the comments here, I decided against it. Instead I found Sunon PMD1212PTB1-A.(2).F.GN on ebay for around $12 and ordered 4 of them. Test result was satisfactory and its a bit louder than I want. The next step was to purchase the NZXT Sentry Mesh to regulate the speed. At around 60% setting the fans are inaudible, and I can ramp them up as needed. Bgear 120mm fan filters were added as a dust control measure.

For my GPU fans, I found replacement parts on aliexpress and ordered them for both the GTX 660 and GTX 650ti. The one for 650ti arrived last week and it was a quick replacement. The other should be in my hands next week.