Quote from: mezza550 on February 11, 2014, 05:47:04 AM

Quote from: NameTaken on February 11, 2014, 04:58:57 AM

I also have Sapphire 280X Dual-X OC (11221-00-20G)s and am happy with 750KH/s I'm getting out of them. 710KH/s was the limit on how much I was able to get out of them out of the box.

First thing I did was download then flash a recompiled and optimized BIOS with 1065MHz core as anything higher than 1070 reduced the hashrate.
Then I downloaded a recompiled and optimized scrypt130511.cl plus scrypt130511Tahitiglg2tc8192w256l8.bin for SGMiner.

Your performance rates sound fantastic. Would you mind sharing those files (bios, .c and .bin files) via dropbox or similar? Also what type of memory do your cards have?

Here is where I got the files from.

https://litecointalk.org/index.php?topic=12369.90

http://www.reddit.com/r/dogemining/comments/1uj4uk/optimized_scrypt_kernel_for_hd7970_r9_280x/

http://fs1.d-h.st/download/00099/G2D/ati_winflash_2.6.7.7z