And how Fiji and 17.xx.x drivers, bad support 560? I'm waiting for version 12.7
I guess, because just a very few ppl mine with 560s, because they are not so efficient, so worthless to bother with it.
they are not so efficient as it is not optimized miner
They are not so efficient because they are weak. The bad thing is that 560s are the only available cards atm in stores, but ppl shouldn't really buy them for mining.
Why 7850 is more effective?
I don't think it is more effective, but that is an old card...