AMD mining cards

Sapphire announced that they are making graphics cards specifically for mining. The cards are tweaked for overclocking to get better mining efforts. There were some rumours that the mining cards would only be available for companies who order graphics cards win bulk. But today I discovered that the mining cards from Sapphire are available for pre-order at https://www.overclockers.co.uk/

specifications

The cards have zero or just one display output. The hashrate for each card is given and you can also find the power usage on the webshop. The cards have one year warranty. This doens't make that big of a deal because the ROI for these cards is around 2 months depending on the ethereum price. The memory used in the RX 470 mining cards is Samsung memory, this is not the best memory used for AMD cards but it will do the job.
As you can see, there is also a mining card available that is based on the RX 560 from AMD. This card is much cheaper, has lower power usage but also a lower hashrate.

Nvidia also announced that they are making mining cards based on the GTX 1060. Currently I am not quite sure which card to get. Should I order a AMD card to mine ethereum or just wait for the Nvidia card and mine Zcash? I hope this post was helpful and good luck to all miners.