I'm really skeptical these cards will be cost/perf competitive with AMD's upcoming Polaris.
The 1080 is the only card with GDDR5X, which from what I've read has twice the bandwidth of GDDR5. The 1080 and 1070 both have 256-bit buses, meaning if the clock rates are equal, the 1070 will have half the memory bandwidth of the 1080.
In contrast, the current gen AMD R9-290, R9-390 and higher have 512-bit GDDR5 buses, and the leaked Polaris cards have 256-bit GDDR5X buses (eqivalent).
AMD cards tend to be priced lower than NVidia cards, so we're very much in a wait-and-see mode right now.
(We do datacenter level cryptographic compute and our workloads are very memory bandwidth constrained.)
The 1080 is the only card with GDDR5X, which from what I've read has twice the bandwidth of GDDR5. The 1080 and 1070 both have 256-bit buses, meaning if the clock rates are equal, the 1070 will have half the memory bandwidth of the 1080.
In contrast, the current gen AMD R9-290, R9-390 and higher have 512-bit GDDR5 buses, and the leaked Polaris cards have 256-bit GDDR5X buses (eqivalent).
AMD cards tend to be priced lower than NVidia cards, so we're very much in a wait-and-see mode right now.
(We do datacenter level cryptographic compute and our workloads are very memory bandwidth constrained.)