If I place an order now, shipping to Hong Kong, when can I receive it?
So I will just need to buy a PSU myself?

If need to preset overclocked by you, same shipping time? What watt PSU is needed for overclocked? Thanks!

Saw on the website "You will receive 2 PCI-E extension cables per unit. This unit needs 2 PCI-E power sources from a separate PSU. "
Why does it need 2 PSU? Can one powerful PSU run? What's the specs needed? Thanks!