I have pre-ordered one too, but I'm kinda affraid of the lack of communication regarding the issue when you proceed with a USD wire transfer. Lot of people had their preorder cancelled after a week, without any money back. And some people seems to be waiting for more than 20 days. I just hope this will not happen to me.

Regarding your question, the official one is out of stock yet. Regarding this video : https://www.youtube.com/watch?v=PPIlHbqms3Y the author recommand using the EVGA supernova 10 50 GS as an alternative https://www.evga.com/products/product.aspx?pn=220-GS-1050-V1.