Fan blade snapped on 7990, ridiculously loud

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Zeuzzz

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Nov 22, 2013
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Hey all, I recently snapped a single fan blade off my GPU when fiddling with the GPU, and now whenever I try to game or use my GPU under stress it starts a really really loud humming sound, basically my GPU starts vibrating like crazy as if the fan it constantly hitting against the edge of the fan sink.

Can I try to glue this back on, or is it possible to buy a new fan and try to attach that?
 
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Z

Zeuzzz

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Nov 22, 2013
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I feared I might have to do this. Do you know why it starts making this noise after just one of the eight fan blades snaps off? There is no noise when its spinning slowly, only when it gets to really high RPMs then suddenly it sounds like I have a pneumatic drill in my computer. I've checked the fan and I cant believe that it's touching anything as it's attached quite firmly.

 
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Pailin

Pailin

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Dec 1, 2007
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Long Term - get a new fan. Maybe can order a replacement from the MFr ?

Short Term - try gluing it back on (research correct glue for plastic type for best results). If Really feeling frustrated and as a last emergency temp resort you "could" cut off the opposing blade to the missing one... but blades are not always directly opposite each other and though vibration will be greatly reduced, it can still be a bit noisy. Would at least be livable until the replacement fan arrives. (Temps may be a little higher than normal so would need to keep an eye on things. - worked for me before though on an old laptop :) )
 
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Z

Zeuzzz

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Nov 22, 2013
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Thanks for all the advise people. The odd thing I have just noticed is that the current noise when I have it mining litecoins at maximum hash's is dependent on the main motherboard cables position, if I apply the slightest pressure to the 20/24 pin connector so it gently presses on the mobo the noise completely stops. However as soon as I let go something starts vigorously vibrating when the GPU fan speed gets up to 40,000 RPM. Simply pressing on the motherboard anywhere near this cable also stops the noise/vibrating. Any ideas how I can secure the motherboard better or stop whatever component is suffering from this vibration problem?

I've ordered another fan replacement but that will be a month. I'll try and glue it soon if there's no other way.
 
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B

B3AST1YCAK3S

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Sep 26, 2013
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If you are going to get it in a month I would just let it be for now. Don't risk anything. If it really bugs you that bad then try to zip-tie it glue can possibly ruin something or cause a problem later. I don't recommend getting any sort of liquid in your PC.
 
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Z

Zeuzzz

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Nov 22, 2013
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Ok things just got a whole lot worse; the fan that the blade has snapped on just stopped spinning completely :( This leads to one of the GPU cores overheating to over 100C as soon as I start doing the most menial tasks, even with an intensity of 9 for mining litecoins. Have I now completely broken my GPU? I would take it out the entire cooling block and have a look but I've never taken apart a GPU before so am scared of breaking something, could it be something as simple as a connector coming loose? Or am I likely going to need to buy a single fan blade or an entirely new cooling block?
 
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Mahisse

Mahisse

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Nov 26, 2012
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Well if the broken fan has caused constant vibrations to your hardware, which it sounds like if you're using the card for mining something may have come loose. It could very well be a simple thing like a loose connection/broken soldering.
You shouldn't have been running your card at a longer time period if it's causing significant vibrations. Vibrations are one of the worst enemies for electronic hardware as it will shorten the lifespan significantly.

If I were you I would just replace the cooling block. There's an okay video available on youtube on how to do so:
http://www.youtube.com/watch?v=FHtvK087biU

If the replacement of the cooling block doesn't help you should look for broken soldering. Using a heating gun can patch those areas up if necessary. Some even put the card in the oven at 40 celcius.

My best guess is a loose connection somewhere caused by the vibration from the broken fan.
 
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4745454b

4745454b

Titan
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Apr 29, 2006
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If the fan isn't spinning it might have lost it's power connection. Make sure it's still plugged in.

Seeing as you lost a blade and have been running it unbalanced the fan motor is probably dead. Here is a replacement fan.

http://www.ebay.com/itm/NTK-FD7010H12S-Single-Fan-For-ATI-HD7990-12V-0-35A-3005-/121278961399?pt=US_Video_Card_GPU_Cooling&hash=item1c3cca16f7

Some even put the card in the oven at 40 celcius.
Click to expand...

40c? That's only 104F. Not nearly hot enough to melt solder. 400C would be 752F which house ovens can't reach. According to the wiki for solder it's around 200-225C depending on the type. (400F-440F) Problems with ovens is they heat the entire card so you might cause a problem somewhere else. Though I have heard of people doing this. Heat guns are a better idea as they only heat the part you want hot.
 
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Mahisse

Mahisse

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Nov 26, 2012
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Err yeah.. It was what I remembered from the top of my head. I see it's a bit ridiculous estimation thinking about it. It should be at 200-225 as you say.
 
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