I did read some information but I just want to make sure I got it right before I actually buy it..
I currently have 2 Sapphire R9 290 21227-00-40G cards mounted on a Gigabyte GA-870A-UD3 mother board.
I am going to buy another 2 cards : Sapphire Radeon R9 290 BF4 21227-00-50G.
What I understood about pci risers is:
1) For those cards I have to buy risers with electricity.
2) The riser itself provides power only while the data goes thru USB connection (USB 3 is preferred for that reason).
3) The only difference between 1X16 and 16X16 is more power from the motherboard, When buying a PCI riser with electricity connection it doesn't really matter (1X16 or 16X16).
Please correct me if I'm wrong, I suspect number 3
Those cards will be powered by a different PSU (1 PSU for the system + 2 cards on motherboard and one PSU for the 2 cards with risers).
Did I get it right?
Thank you