I have an MSI Twin Frozr II 5870 and a Sapphire 5870.
The MSI had a broken fan blade and the other fan wouldn't spin well (made loud noises), so I took the Arctic Accelero Twin Turbo Pro off of my AMD reference card to try and cool the MSI board. It's not cutting it.. Even at stock clocks, I get up to 85C really quickly... The Sapphire was shorted out with an HDMI cable somehow and blew out the HDMI port. Now the card won't post (that's as far as I've gone with it).
For $250 FIRM, you get 2x5870 to tinker with. I'm not sure about the warranty, as I haven't even contacted MSI or AMD...
Take a look at the pictures, make me an offer, or a suggestion as to what I'm doing wrong with the temps. (took off Twin Frozr, cleaned GPU die, re-pasted, and installed Twin Turbo Pro).http://imgur.com/a/bjhoa
-- for the pictures.
I have sold on these forums before with good feedback. Do your homework.