as far as i see the r9 280x is still one of the best mining cards.
But when i compare the specs with, for example, a R9 nano. Theoretically the R9 nano should clearly outperform the 280x. But instead it also does something around 25 MH like the 280x ?
R9 280x Specs:http://www.techpowerup.com/gpudb/2398/radeon-r9-280x.html
R9 Nano Specs:http://www.techpowerup.com/gpudb/2735/radeon-r9-nano.html
My question is why ? What are the key facts for fast ether mining ? Cache Bandwith ? Clock rate ? GFLOPS ?