I think the ZEC miner is already very efficient.
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...
While I dont disagree with you that the 380X and 560 are not the newest or greatest cards for ZEC mining, you have to remember not everyone has the resources to go out and buy 580s, 1080s (if you can find them) or the next greatest card to be released. Not everyone has a warehouse full of miners. As I say all the time, dont forget the budget hobbyist miner, thats how all this crypto currency stuff got started. One guy with an idea and zero resources. My point, the little guys are the ones who innovate, even on old or junk hardware. These rich guys are just after profits, they dont care about the technology or privacy. Im also offering to send Claymore a ZEC donation if theres anything he can do for the 380X, while others are here whining about his fee and actively searching for ways to thwart it.