[Radeon HD 6990]

The 2 Radeon HD 6990's I'm selling on eBay have ONLY 4 HOURS REMAINING!!  These cards are only 3.5 months old.  They are awesome at hashing, exceeding my hashrate expectations at about 740 MH/s each, not to mention that games look deliciously smooth on these bad boys.  Crysis 2 runs like butter on max settings as does Deus Ex: Human Revolution.

Check them out!

http://www.ebay.com/itm/170701175886
and
http://www.ebay.com/itm/170701176166

Happy bidding!!

I'm selling two Sapphire Radeon HD 6990's.  These cards are amazing at mining and I wish I didn't have to give them up.  I got consistent hash rates of 744 MH/s each, using CGMiner.  Below, are the eBay links.  The bidding started at $0.99 each and there is no reserve.  Six and a half days left (as of this writing).  Check them out.

http://www.ebay.com/itm/170701175886

http://www.ebay.com/itm/170701176166

If you're interested I can tell you the CGMiner parameters and which drivers I used, etc. to give the best stability and hashrate conditions.  I kept them air-conditioned for cooling.

Please feel free to ask me anything you want to know about them.
Merry mining! 

Would someone be kind enough to update me on the status of mining performance using Windows vs. Linux tools?

I've read recently that some Windows GUI miners now include the BFI_INT optimization that used to be what put the Linux miners ahead in performance.  Is that the only consideration?  I like the idea of a GUI for ease of use, but I'm no stranger to the Linux prompt, so I'll use whatever gets the best performance.  If, however, performance is about the same on both, I'd prefer a GUI.
Thanks in advance for your suggestions!

Here's a question I have not seen addressed in the forums (though I'll admit to not having done an exhaustive search).  The video cards I want generally come in two flavors:  1 GB of video memory or 2 GB.  I have seen many posts recommending underclocking video memory to save power, so I assume memory throughput is not a consideration in mining.  But does size matter?