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I have a XFX HD-687A-ZHFC Radeon HD 6870 and the fan seized up while playing games.. it would heat up to over 90c and game would lock up.. found that fan stopped. I removed the card from system and removed the whole shroud.. I ghetto rigged the fan to a spare psu to see why it wont turn on. it spun a few times, lasted for 1m and stoped cold. ...

here is the said card in the buff:

the oem cooling unit had nothing on the ram chips at all

zip tie method wont work with a spare h80i I have.. the only thing I found that will work is
GELID Solutions GC-VGA02-02

what I don't know is if the card I have is a ref design or not