Fan on processor stopped spinning

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pcslookout

Lifer
Mar 18, 2007
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This is my current heatsink/fan Scythe SCBSK-2100 120mm Sleeve BIG Shuriken 2 Rev. B CPU Cooler

What should I do ? How do I get a replacement from Scythe ? Thanks.
 
UsandThem

UsandThem

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mindless1

mindless1

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The fan bearing is probably toast due to being such a high fan diameter to thickness ratio, but you could pull the fan off and see if there's a bearing plug you can remove to put a couple drops of oil in.

That's not a long term solution with that type of fan but might keep it running till a replacement arrives. I'd get a normal 25mm thick replacement if there's clearance for it.
 
mindless1

mindless1

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^ First one has 4 pin pwm speed control. Get it if your motherboard supports it.
 
mindless1

mindless1

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Dunno, up to you to compare the mechanical fastening based on shape of fastening area. From here it looks like the clip might fit in the slit on the side but if there's not enough clearance you might need to cut/dremel/etc a little of the material away from the center rib.
 
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pcslookout

Lifer
Mar 18, 2007
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mindless1 said:
Dunno, up to you to compare the mechanical fastening based on shape of fastening area. From here it looks like the clip might fit in the slit on the side but if there's not enough clearance you might need to cut/dremel/etc a little of the material away from the center rib.
Click to expand...

Ok thanks.

You said to add a normal 25mm fan if possible why ?

Also if so would this help cooling performance more ? Any of these fans. https://www.newegg.com/Product/Prod...NodeId=1&name=Case Fans&sstore=1&havesstore=1
 
mindless1

mindless1

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^ All else equal, a 25mm thick fan:
  • Pushes more air at lower RPM, lowering bearing wear and noise (though if your 15mm was barely spinning, not as much in this application, but I suspect it did have to spin up at high load)
  • Greater bearing length, load bearing surface spread out, and (in the case of sleeve bearings) holds more lubricant
  • Easier for the manufacturer to balance for less bearing wear, less pumping lubricant out of bearing, and less vibration
All this combined results in multiple times longer fan life. There's also a much greater selection of 120mm x 25mm so no need to spend $20. A mid-grade quality 25mm thick 120mm fan will outlive a high quality 15mm thick.

However some of this changes once you move thicker than 25mm, generally quality thicker fans tend to be more targeted towards industrial apps and have higher torque motors which don't spin evenly and quietly at very low RPM - there are exceptions, but the move to 25mm would be plenty, no need to chase red herrings.
 
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pcslookout

Lifer
Mar 18, 2007
11,959
156
106
mindless1 said:
^ All else equal, a 25mm thick fan:
  • Pushes more air at lower RPM, lowering bearing wear and noise (though if your 15mm was barely spinning, not as much in this application, but I suspect it did have to spin up at high load)
  • Greater bearing length, load bearing surface spread out, and (in the case of sleeve bearings) holds more lubricant
  • Easier for the manufacturer to balance for less bearing wear, less pumping lubricant out of bearing, and less vibration
All this combined results in multiple times longer fan life. There's also a much greater selection of 120mm x 25mm so no need to spend $20. A mid-grade quality 25mm thick 120mm fan will outlive a high quality 15mm thick.

However some of this changes once you move thicker than 25mm, generally quality thicker fans tend to be more targeted towards industrial apps and have higher torque motors which don't spin evenly and quietly at very low RPM - there are exceptions, but the move to 25mm would be plenty, no need to chase red herrings.
Click to expand...

Thanks. Unfortunately I looked at my heatsink and there is no screwholes for a 25mm fan :( The only thing that will work is 15 mm fan it seems with the 2 little clips I got to connect the fan to it. Oh well.
 
mindless1

mindless1

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Why would there need to be screw holes for 25mm thick fan? A standard 25mm thick fan would attach exactly the same way the original fan did.
 
mindless1

mindless1

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With rare exceptions, DC computer fans always blow out the rear, specs label side, that one included.

Any decent fan will have cupped/concave blades rather than flat so you can also look at the blades. It will blow out on the concave side.
 
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pcslookout

Lifer
Mar 18, 2007
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Which fan do you recommend for a Scythe SCBSK-2100 120mm Sleeve BIG Shuriken 2 Rev. B heatsink ? It can be 25mm. As long as it will work with my 2 little clips that put the other fan on.
 
mindless1

mindless1

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^ I haven't priced fans recently. Anything low RPM with the 4 pin PWM (or 3 pin if motherboard isn't 4 pin).

I can't see what the very end of the clip looks like, whether it bends down into the screw hole in the fan frame or not. If it does then don't get a fan that has an entirely enclosed screw hole channel running from one side of the frame to the other. In other words not this:

Gbr6J6R.jpg

... though if I happened to have a San Ace in a low RPM 25mm and wanted to use it, I'd just cut that screw channel off with a hacksaw. They're great fans, worth the bother.
 
Last edited:
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pcslookout

Lifer
Mar 18, 2007
11,959
156
106
mindless1 said:
^ I haven't priced fans recently. Anything low RPM with the 4 pin PWM (or 3 pin if motherboard isn't 4 pin).

I can't see what the very end of the clip looks like, whether it bends down into the screw hole in the fan frame or not. If it does then don't get a fan that has an entirely enclosed screw hole channel running from one side of the frame to the other. In other words not this:

Gbr6J6R.jpg
Click to expand...


Ok thanks. Here is what the clips look like.

Sorry for the picture quality.


pfYhkEY.jpg


Does that help ?

Can you show me a picture of what kind of fan to make sure to get please? Thanks.
 
Burpo

Burpo

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Sep 10, 2013
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Yeah I see that now.
Was looking at the part number.. My bad
 
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