The 5870's fan died today.
Started with a loud screeching and now it's a periodic loud grinding noise. It's still "working" for now but the noise is annoying and I suspect it'll totally die and the card will overheat soon.
Going to be replacing with an ASUS MATRIX-R9280X-P-3GD5.
edit: Guess that was sold out... getting this instead:
ASUS ROG MATRIX Radeon HD 7970 Platinum
It'll be here tomorrow thanks to Amazon Prime.
This comment was edited on Oct 15, 2013, 00:22.