My Sapphire Nitro+ 56 just arrived a few hours ago, been tinkering with it but the most I'm getting is around 1300 h/s.
Got core -30% and memory at 945. It's running smooth but I was expecting a fair bit more.
Does anyone have Nitro+ 64 BIOS they could share as I think the next step is trying to flash the silent bios with 64 unless anyone has any other suggestions!!
Download GPU-Z and find out who manufactures the HBM2. If it's Hynix (and it probably is), you may be SOL in terms of mining performance - at least until AMD fixes their software so that Cryptonight workloads utilize the Compute drivers.
An announcement was made around the 15th of December that the Nitro cards were shipped to retailers, but I haven't heard of them being sold anywhere yet.
NewEgg had them. I own a 56, and a family member has two 64s.