In the last weeks I've noticed the fan of my Sapphire ATI Radeon 6770 graphics card is getting noisier and noisier. So I've tried to get the fan out, peel the sticker below and add a small amount of 3-in-1 oil to the inside of the fan. But it doesn't seem to help much as the noise persists, albeit a little less loud.
For reference, this my card model: http://www.sapphiretech.com/presentation/product/product_index.aspx?pid=1190&lid=1
Is there anything else I can do to fix it? Is there a replacement fan for this card I can buy somewhere? (And where?). If I can get a new fan, is there a video/website somewhere that shows how can I change it?