I understand this forum is primarily designated for BTC.... but i have found some answers for Scrypt Coin Mining in the past here... So I thought i'd give it a shot.
I've started Scrypt Mining with middlecoin.com. I have one rig with a 6990 & 2x5770's. It's working great. My other rig has two 5970's, with Windows 7, GUIminer + updated CGminer 3.7 and AMD drivers 12.8. They K/hashs are alright, around 700K/hash per card... but the amount of accepted shares are extremely low. My 5770's are doing much better! The initial problem I was having, was the 5970's were not connecting ("connection problems"). I couldn't solve it until i started playing around with the Thread Concurrency number. I set it to a 5770's default of 3200 and Eureka, it worked... but now the i'm barely getting any accepted shares?
The 5970's are setup as:
Thread Concurrency: 3200 (also works at 3900)
Vectors 1
GPU Threads 1
Worksize 256
Intensity 18
Whats the problem? What should I do to ensure i'm getting the most out of my 5970's? I should be around a total of 2.4 M/Hash for both rigs. But on middlecoin.com it's showing around 1.2, which is the amount of one of the rigs.
Any help would be greatly appreciated
Thanks