Completely optimizing the code to best work with a new algorithm takes time. Has nothing to do with price of the currency compared to the miner's new version release dates.
I believe we're getting pretty close to the limit on Sol/s.
you are very wrong
Well fkin speak up dude O.o, sure there's a great possibility Claymore has been holding out so he can make some big bucks on the side but unless you have evidence of this then you're just spitting conspiracy theories.
It's probably easier and more profitable just to release this with a dev fee.
I wonder more if they just don't know how to do math. R9 290/X & R9 390/X have a 512bit memory bus vs 256bit for the RX 480's & 470's
A base R9 290 has a 1250MHz memory clock multiply by 8, "64/512," and you get 10000
A base RX 480 8GB has a 2000MHz memory clock multiply by 4, "64/256," and you get 8000
so your memory bandwidth is 20% lower
As we all should know by now higher mem clocks = Higher latency
getting your ram to have a lower than 7.5ns turn around is ideal
If you don't believe just look at DDR3 vs DDR4, at same speed DDR3 wins almost hands down because of lower timings.