sapphire 5870 fan problem - page 2. | Bitcointalksearch.org

abracadabra

hero member

Activity: 956

Merit: 1001

Quote from: dishwara on October 05, 2012, 05:18:24 PM

Yes it may break, if using wrong method.
The trick is you have to "lift up" the screw driver or stick instead of pushing down.
Also u MUST attach the fan to heat sink or some wood board for support.

I removed the heat sink & screwed it upside down in plastic cover then screwed fan to it.
So, it was easy to open, coz the heat sink, gives support for lifting.

Just noticed this thread. I'm glad i saved my old locked up fans. I have now repaired 7 fans in this manner.

thanks dishwara!

dishwara

legendary

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Yes it may break, if using wrong method.
The trick is you have to "lift up" the screw driver or stick instead of pushing down.
Also u MUST attach the fan to heat sink or some wood board for support.

I removed the heat sink & screwed it upside down in plastic cover then screwed fan to it.
So, it was easy to open, coz the heat sink, gives support for lifting.

Like this image

AndrewBUD

hero member

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Yeah I am not very fond of separating the fan as shown above....

ssateneth

legendary

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I don't know... I'll stick with drilling a hole on the face of the fan. I broke 3 fans doing the "separation" technique. The fan didn't seperate from the motor though. The plastic mounting base separated (broke) from the PCB instead, completely destroying the fan. I realize that the only thing holding these fans together is a little thin circular plastic washer with 4 cuts into the disk in the design of a plus, so it can be inserted and bend until it reaches the divot on the axle of the fan, but some of these are just too strong and won't bend again when you try to pull the fan off.

dishwara

legendary

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@Soros Shorts: 100+ Thanks. Worked flawless.

Note: Those who want to open fan for lubricating, put screw drivers or any metal sticks or rods which wont bend, lift both the screw drivers, by placing your palm below screw drivers.
If you try to push down or press down hoping, that you push down screw drivers, so that will make other side go up & lift fan, It won't, it may break fan blades.
Also, you need to screw fan to heat sink, so that it wont move when opening.

Soros Shorts

donator

Activity: 1617

Merit: 1012

I just had a Sapphire 5830 seize up on me and took some pictures while fixing it. The fans look similar to those used on the 5870 except that the mounting holes are different.

These fans are made by "firstd" and you should be able to pop them right out.

Use a pair of screwdrivers or something similar.

Do not apply any force on the fan blades as they will break easily.

Once the fan pops out the spindle and hole are exposed. You can apply lube to both the spindle and the hole.

I like Bel-Ray chain lube, a high-performance lube designed for motorcycle racing applications. This the lube is thick and sticky and the fan does not spin as freely as thin lube. However is stays on longer and I won't be surprised if it lasts longer than the original lube. I've never had to reapply this.

If the fan has developed a rattle, thick lube would help elminate this. However, most people seem to prefer light machine oil so you might feel safer using that instead.

AndrewBUD

hero member

Activity: 1078

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Yeah I don't like that style...

I have a similar style 5850 I put a 5770 fan on it so I could continue mining with it.

If you keep the shroud on and put a very high RPM 92mm fan sealed to the hole blowing air through, it should do better than the original fan

superfastkyle

sr. member

Activity: 437

Merit: 250

this is the only fan type the oiling trick hasn't worked on for me. So you may have to replace it. A reference fan will line up with one of the holes and provide better cooling if you can't find the exact fan. I found out the hard way though don't plug a reference fan into the board though your gonna need to splice a molex on the end. I guess the resistor on the fan control can't handle 10 watts, so be aware of that

dishwara

legendary

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Yes, i can place a 120mm fan, but its not cooling that much.

No way to open the fan to lubricate without breaking?

zvs

legendary

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https://web.archive.org/web/*/nogleg.com

or to repeat myself for the nth time

zip tie a 120mm on that shiz

poon-TANG

full member

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Check on ebay ...you can usually pick up stock fans for $7-$10

dishwara

legendary

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Merit: 1016

Hi,

I have a sapphire 5870 graphics card.
The fan is not rotating correctly & that makes pc to crash due to high temperature.

The fan is rotating but not in full speed, even though its set to run at 73% speed.

I manually try to rotate fan & found its not moving easily.
Its clearly fan lubrication problem.

Normally i use to open back of fan to put 1-3 drops oil when it runs slow or not running.
I removed the fan hoping to put oil or grease.
But the damn fan don't have any ball bearings or opening to put oil.

Link for full size of back side of fan.
http://i47.tinypic.com/2z71oxi.jpg

https://www.youtube.com/watch?v=kH8spGRL3Yk
This video show how to disassemble & put oil on reference fan & also fan with ball bearing, which also not helping in my case.

I put 2-3 drops in the center gap, but it seems not going in, but leaking out.

Anyone have any idea or link or way to put oil on my fan or how to disassemble it with out breaking?
Please share.

Thank you.

Topic: sapphire 5870 fan problem - page 2. (Read 7007 times)