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 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 crappy 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.
Don't get me wrong, I have 380xs too, but i don't mine zec anymore with them. Not the greatest card for zec mining, I just said, it's not a good decision to buy (atm way too overpriced) 560s to mine. I understand everyone want to hop in mining business as soon as it's possible, but waiting would be more benefical instead of buying 560s rigs. There won't be ROI and once the GPU industies will be back on track as normally these cards will have literally 0 resell value.