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Case fans seem weak?

post #1 of 11
Thread Starter 
Hi I just built a new computer so Im ironing out problems.

I have a HAF-X case which has some big ass fans. But they dont seem to be running at full speed. I can see the motors in the middle "wobbling" quite obviously. When I put my hand over the top exhaust fan for example it feels like a mouse breathing on it. Is this normal? I have all the fans connected directly to 4 pin molex cables from the power supply. I assumed these big fans would push out lots more air
post #2 of 11
If the 200mm fans are plugged into 4 pin molex, they are running at 12v, or full speed. you'd be suprised, they push like 100cfm, but its over a big area so you cant feel it.
post #3 of 11
They aren't that powerful, but they are quiet as hell and they still get tons of good air flow through the case. Because the size of the fans the the intakes are so large, they get a lot of volume through. You could get more powerful fans at that size, but you would not really improve temps at all and you'll have to deal with louder fans.
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post #4 of 11
Thread Starter 
ok thanks, yeh i prefer the quietness. if it wasnt for the red fan i couldnt tell if my pc was on or not
post #5 of 11
I use the haf 922, which has the same fan front and top. These fans are more like air conditioning for the case than cooling, and they do run at a relatively slow speed. but as they are big big fans, the area of air being pushed/pulled covers a larger area and your hand is still the same size when you compare it to a 120mm fan it feels like not so much air is moving, but its because you cant feel all the air at once.

You can download speedfan, or check in your bios to see your fans rpm, i THINK they are rated at about 800rpm.

as for the wobbling i dont notice it on mine, id have to see a video or something to see what you mean... HTH...

HTH

edit: lol the guys above me have said it right, they both posted while i was writing my post so i guess theyve already covered what ive said
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post #6 of 11
You will feel less air being pushed through a 200mm fan vs a 140 or 120 since your hand is covering less area, as airflow is usually measured in cubic feet per minute (cfm), which is area dependent... Science ftw!
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post #7 of 11
Thread Starter 
Quote:
Originally Posted by jacobrjett View Post
as for the wobbling i dont notice it on mine, id have to see a video or something to see what you mean... HTH...
what i mean is, when a fan is spinning slowly the sticker or motor in the middle looks like its wobbling while its spinning.. compared to a high rpm fan which just looks like a blurry dot
post #8 of 11
Quote:
Originally Posted by kooldog View Post
what i mean is, when a fan is spinning slowly the sticker or motor in the middle looks like its wobbling while its spinning.. compared to a high rpm fan which just looks like a blurry dot
The sticker might not be centered, you cant go by that.
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post #9 of 11
lol, i am troubleshooting the same exact problem. The side fan is making a ticking noise. Definitely noticeable under load. It's connected via power by the motherboard.

I took the fan out and held it in my hand and the noise is defintely there.
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post #10 of 11
Quote:
Originally Posted by ElementR View Post
The sticker might not be centered, you cant go by that.
Thats the point he's making, the sticker isn't centered. If the fan was going fast enough, he wouldn't be able to see the wobble, he would only see a single circular blur. Thats how he judged the fan wasn't spinning as fast as other fans he'd used or seen.
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MooCwzRck
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