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Quote:
update:
After running the fan for 5 days at consistently varied speeds, it seems the original Foxconn fan fitted to this card would have varied levels of bearing rattle at any speed, in the normal orientation you would install a graphics card (in a vertical ATX tower). I did not forsee the situation improving itself.
As I just upgraded from a dual HD4870 Crossfire setup, I had access to some viable replacement fans already.. I took note of the fan RPMs at different loads in CCC, then went ahead and disassembled both cards;

Since the cards are relatively similar in construction, I'll detail only the the HD5970 disassemble here.. I referred to the EK Waterblock install guide for screw locations.
Start by removing the screws on the front I/O panel, then the backplate, and finally the GPU brackets.

Next, I find you have to pry the I/O plate so that the lip clears the cowl, then lift the card straight up to separate.

On the back of the heatsink you will find several screws that mount the cowl in place. Locate and remove these, saving the screws for the fan until the next step.. The metal plate should then separate from the cowl.
Now would be a good time to clean off the stock thermal gunk, and replace with AS5 or your favorite thermal grease.
Final step to removing the fan, is to unscrew the 3 mounting screws. Now is a good time to unplug the PWM cable from the PCB if you haven't already.

Now you're at the halfway point! To install the replacement fan, just reverse the disassembly procedure, and eventually your HD5970 will be as quiet as the following picture!

Conclusion:
Foxconn clearly used flawed bearings on the stock fan in many some HD5970 cards shipped.. Comparing the Foxconn to the chinese fan fitted to my HD4870 card is like comparing an old IDE hard drive's acoustical properties to a new Samsung today. I will likely be contacting ASUS about a replacement fan, since I forked out quite a bit of money for their flagship video card.
Fan speeds of the chinese fan differ only by -40 rpm at lower speeds, but +100rpm at 100% load, compared to the rattler-Foxconn. 40% fan load is also much quieter than 20% was with the Foxconn.
EDIT (2/2/12):
Found a couple links that might make it easier to source a new fan for your rattly Radeons.. Just so you know, these will replace the fans on any -reference- design, dual-slot Radeon from HD4000 to HD7000..
http://www.google.com/search?q=d7525b12hp-0-c01&tbm=shop Google search by Part Number
http://www.pchub.com/uph/laptop/676-56300-16790/Others-Brand-NTK-Server-Round-Fan.html PCHub
http://www.amazon.com/ATI-Video-Card-4870-Replacement/dp/B005DO69T4 Amazon seller
http://www.ebay.com/itm/180779041435 eBay
Originally Posted by d0gZpAw Just received my Asus HD5970 after a long 40 days of waiting for it to arrive.. Now I find it works perfectly, other than the dreaded "fan rattle" that seems to plague some of these cards. I've read over threads in multiple forums, but never came up with a definitive answer to the problem.. Did everyone with this problem just deal or RMA the card? Or is it actually possible to fix the fan rattle by tightening the mounting screws? I would prefer not to have to deal with RMA after already waiting 40+ days, and I want to get my old HD4870 cards sold, so I don't really want to reinstall them at this point. I'm not afraid of disassembling my expensive new graphics card if it means I can fix this annoying chirpy sound. I'd just like to know if anyone has successfully fixed a 5970's fan chirp this way first. |
update:
After running the fan for 5 days at consistently varied speeds, it seems the original Foxconn fan fitted to this card would have varied levels of bearing rattle at any speed, in the normal orientation you would install a graphics card (in a vertical ATX tower). I did not forsee the situation improving itself.
As I just upgraded from a dual HD4870 Crossfire setup, I had access to some viable replacement fans already.. I took note of the fan RPMs at different loads in CCC, then went ahead and disassembled both cards;


Since the cards are relatively similar in construction, I'll detail only the the HD5970 disassemble here.. I referred to the EK Waterblock install guide for screw locations.
Start by removing the screws on the front I/O panel, then the backplate, and finally the GPU brackets.


Next, I find you have to pry the I/O plate so that the lip clears the cowl, then lift the card straight up to separate.

On the back of the heatsink you will find several screws that mount the cowl in place. Locate and remove these, saving the screws for the fan until the next step.. The metal plate should then separate from the cowl.
Now would be a good time to clean off the stock thermal gunk, and replace with AS5 or your favorite thermal grease.
Final step to removing the fan, is to unscrew the 3 mounting screws. Now is a good time to unplug the PWM cable from the PCB if you haven't already.


Now you're at the halfway point! To install the replacement fan, just reverse the disassembly procedure, and eventually your HD5970 will be as quiet as the following picture!

Conclusion:
Foxconn clearly used flawed bearings on the stock fan in many some HD5970 cards shipped.. Comparing the Foxconn to the chinese fan fitted to my HD4870 card is like comparing an old IDE hard drive's acoustical properties to a new Samsung today. I will likely be contacting ASUS about a replacement fan, since I forked out quite a bit of money for their flagship video card.
Fan speeds of the chinese fan differ only by -40 rpm at lower speeds, but +100rpm at 100% load, compared to the rattler-Foxconn. 40% fan load is also much quieter than 20% was with the Foxconn.
EDIT (2/2/12):
Found a couple links that might make it easier to source a new fan for your rattly Radeons.. Just so you know, these will replace the fans on any -reference- design, dual-slot Radeon from HD4000 to HD7000..
http://www.google.com/search?q=d7525b12hp-0-c01&tbm=shop Google search by Part Number
http://www.pchub.com/uph/laptop/676-56300-16790/Others-Brand-NTK-Server-Round-Fan.html PCHub
http://www.amazon.com/ATI-Video-Card-4870-Replacement/dp/B005DO69T4 Amazon seller
http://www.ebay.com/itm/180779041435 eBay