GPU Choices ?

[Serpent]

lets take the NTLM for example, the 290x gives approximately 21 billion tries and the GTX 980 approximately 15 billion, what would the numbers be for multihash ? like i said i dont care for the power consumption, its a comparison between perf/price now,that is if i get 2 290x for the price of one 980 for example and i get double or better performance in the 2 290x ill go for 2 290x. and what is the memory role in all this ? yeh and i agree about the drivers