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Author Topic: Sapphire 5850 Fan Dead  (Read 24063 times)
_Vince_
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February 17, 2012, 05:14:03 AM
 #61

Btw I also want to said that I drill from the bottom, not top. It is quite strange for me to see you remove to top sticker which has "Sapphire" word


If you check the previous pic, you will see that they drilled the bottom, non-moving part of the fan.
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Tim the Magician
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February 17, 2012, 05:19:37 AM
 #62

The guy who drilled from the bottom said it stopped working again.. SlaveInDebt said he drilled from the top and his still works months later.

I actually removed both stickers and the bottom one has a PCB visible through the gaps.. I didn't feel like drilling through that was a good idea.  Other fans which have a grease reservoir cap seem to have that located on the top.
_Vince_
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February 17, 2012, 05:29:31 AM
 #63

OK, Maybe I need to disassemble one dead fan to get more info
Tim the Magician
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February 17, 2012, 05:30:52 AM
 #64

OK, Maybe I need to disassemble one dead fan to get more info

Please post picts if you do  Smiley
abracadabra
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February 17, 2012, 02:48:33 PM
 #65

I've had good luck repairing 5 sapphire fans by using SlaveInDebt's idea to drill a hole just off center (thru the front) about 2mm off center with a drill bit the same size as the straw on the spray can of teflon I use.



I run them overnite.  Then spray them once more.  They run better than new.

Tim the Magician
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February 18, 2012, 02:40:34 AM
 #66

All right.. It’s done  and so far it looks like Great Success!..

I unfortunately, I didn't read my PMs first because SlaveInDebt got back to me and said he drilled 8mm-10mm from the center.. I was closer to 3mm.. but hey.. whatever works right?

Drilling..  I went about 6mm down.




It seems like I drilled through a top level and a bit into the level below.  I can tell because when insert a needle into the hole and rotate the fan it catches a bit where the hole was initially drilled.

Next I tried to inject as much lubercant into the hole as I could.  I inserted a needle and rotated the fan to try to spread the grease around.  Repeat x2..

Fan one complete:




Zoom! 100%




Fan 2 complete: (more confident this time)




It was a little difficult to get the stickers to stay on.  After wiping the excess grease off of the top of the fans the stickers didn't like staying put.. I got them on but I'll be watching to be sure they don't fall off later.

The second fan didn't want to start at first so I had to kick start it with my finger.. after a few tries it started up and is running solid at 100% like the other.

Back home again:




I'm planning to run them both at 100% overnight and then set them back on automatic sometime tomorrow..

I'll post a status update this weekend..
SlaveInDebt
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February 18, 2012, 05:24:34 AM
 #67

Nice work Tim. I suggest sealing/covering the oiling hole with something to prevent spray, reduce dirt oil, and faster drying of oil.

"A banker is a fellow who lends you his umbrella when the sun is shining, but wants it back the minute it begins to rain." - Mark Twain
Tim the Magician
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February 18, 2012, 05:58:36 AM
 #68

Nice work Tim. I suggest sealing/covering the oiling hole with something to prevent spray, reduce dirt oil, and faster drying of oil.

Thanks and I agree.. I only ran it for about a minute as a test and to get the pict.  I ended up getting the Sapphire stickers to stay on (for now).. if they end up falling off later I may have to clean the fan tops to remove the grease remnants and use a new sticker (or tape).   
Tim the Magician
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February 18, 2012, 04:54:26 PM
 #69

I'll post a status update this weekend..

As of this morning both fans have failed.

The theories I'm working on are:

1. Grease was too thick/hole too small so not enough actually got where I wanted it

2. Hole was in the wrong place.

3. Debris or damage to the sub-surface layer is creating additional drag.

4. Both fans are DOA and not resuscitatable.

1 and 2 I can work with.. 3 I can’t do anything without breaking the fan open and I’m not confident that these are able to be reassembled in working order.  And 4 doesn’t really have a good solution given the lack of replacement parts.

Plan of attack: (fails cascade to next letter)
A.   Buy some Tri-Flow as suggested by abracadabra and apply to existing holes.
B.   Drill new larger holes at the 8mm-10mm offset suggested by SlaveInDebt and apply SuperLube
C.   Tri-Flow on the new holes
D.   Huh
E.   Profit!?
Tim the Magician
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February 18, 2012, 10:16:48 PM
 #70

Wow is Tri-Flow hard to find..

I went to like 4 different auto parts stores and a big box hardware store and no dice..

Granger and a local bike shop both seem to have it but neither will be open until Monday..
Photon939
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February 19, 2012, 12:18:55 AM
 #71

All you have to do is pop up the fan hub and apply oil directly to the fan shaft, that way you don't need to drill holes in the plastic. Also probably helps prevent dust from gumming things up. I've oiled my Sapphire 5850 fans this way and they've been running for several months now.
Tim the Magician
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February 19, 2012, 02:55:03 AM
 #72

All you have to do is pop up the fan hub and apply oil directly to the fan shaft

I did apply some force to attempt to pop the hub off but it got to the point where it felt like it would break and I went the hole drilling path..  Can you give a little more detail?  I have 9 of these cards so I expect I'll be doing this again at some point.

Thanks,
Tim
Tim the Magician
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February 19, 2012, 04:03:12 AM
 #73

Ok..

So I found Tri-Flow at REI in the bicycle section.. Unfortunately, there isn’t an REI very close to my house but they are open to 8pm so I drove out and bought it.

Tri-Flow is pretty cool, it is rated to 475F and the cards will shut the system down at less than half that temp so it seems like a good match. It’s a 4oz Aerosol spray can.. The tube which attaches to the sprayer is too large for the 1/16” hole I drilled (the tube seems to be about 3/32”) and the propellant was way too energetic so I filled a needle oiler and used that to apply the lubricant.





The fans move way more freely than they ever have so I reinstalled them and they are running great (so far at least) with no kick starting required.

I plan to run the fans overnight at 100% and then set them to Automatic tomorrow.
SlaveInDebt
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February 19, 2012, 06:36:32 AM
 #74

I used ATF additive if it matters to the discussion.

"A banker is a fellow who lends you his umbrella when the sun is shining, but wants it back the minute it begins to rain." - Mark Twain
abracadabra
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February 19, 2012, 10:38:59 AM
 #75

I would not try to "pop up the fan hub" as Photon939 says.  I tried and broke the fan.  You are trying to get lubricant to the shaft. That's the reason for drilling 2-3mm off center.  I beleive at 8mm you are way too far from the shaft and you now risk drilling into the armature of the motor. If you nick an armature wire, motor is done. I showed Tri-Flow but I believe any teflon based aerosol spray will do the trick.  I wasn't worried about the spray being "too energetic"  I want some lubricant getting in there. After running them overnight, hit them with another couple short bursts.  Forget about trying to reinstall the same sticker.  It'll eventually fall off unless you clean off the fan hub nicely and apply new adhesive.

Tim the Magician
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February 19, 2012, 05:58:00 PM
 #76

12 hours and still going strong.  It looks like the Tri-Flow did the trick.  I plan to reapply at the 24 hour mark as abracadabra suggested.

My issue with the "too energetic" propellant involves the hole being too small for the tube to enter so I ended up with most of it just spraying all over the place.  Next time I will drill 3/32 holes so I don't have that problem.

My Tri-Flow does not say anything about Teflon.. In fact I don't see any current Tri-Flow products which mention Teflon.  They have something called P.T.F.E. which is considered a hazardous substance.

Here is the Material Safety Data Sheet which lists the contents: [MSDS]

Here is the product info: [Tri-Flow]

[UPDATE] P.T.F.E. (Polytetrafluoroethylene) IS Teflon.  Teflon is a brand name owned by DuPont.  They must have gotten tired of paying to use the name.
Photon939
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February 20, 2012, 06:50:42 AM
 #77

All you have to do is pop up the fan hub and apply oil directly to the fan shaft

I did apply some force to attempt to pop the hub off but it got to the point where it felt like it would break and I went the hole drilling path..  Can you give a little more detail?  I have 9 of these cards so I expect I'll be doing this again at some point.

Thanks,
Tim

You should try to use multiple screwdrivers to pry up evenly on the hub, maybe next time I have to do it I can make a video. It works on the squirrel cage centrifugal fans on the reference cards too.
Haku
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February 20, 2012, 07:41:08 PM
 #78

Anyone has tried this fan for a 5850 xtreme?

http://www.ebay.es/itm/170671202120?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649#ht_2233wt_1163
Miner612
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February 21, 2012, 01:25:35 AM
 #79

I do not support Sapphire for that exact reason.  EVERY one I have ever had ... the fan breaks.

I buy and sell GPUs, most 5850s and 7970s. 
jimzolorenzo@gmail.com  -- Make an offer.
http://myworld.ebay.com/i_buy_5850s  -- current inventory
I have a couple bare bone mining rigs for sale as well.

--------------

I bought silver from [ccliu] 5 star transaction!
I bought silver from [TECSHARE] -- shipping still
Tim the Magician
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February 21, 2012, 02:42:59 AM
 #80


It looks like it would fit.. The listing specifies 72x10 and the original fan is listed as 80x15 on the Polish website which seems to have them: Wentylator FD8015H12S 80x15 12V

I'm not sure about the mounting placement and I don't have a ruler in mm to measure one.. if you are trying to replace one you should be able to do the measurement yourself (please post your results)
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