Nvidia GTX 980 / GTX 970 (Compute performance added)

[epixoip]

it helps in that you can load large hash lists, and get more parallelism out of obese algorithms like scrypt. but perhaps more important than the quantity of ram is the fact that nvidia has a vastly superior memory controller than amd, so you won't see near as much of a performance hit on large lists like you do on amd.

this card is a major win no matter how you look at it.