1x to 16x riser no difference other then how safe each version is i think the highest version out is V6 at the moment and how well built they are and there are some cheap version of V3 which is the most used Version it looks like, V6 if there isn't a higher one is the best built safest one from what ive seen,and cost the same as any of them, i use three of version 6 over V3 and there is no deceases in hash.
can you give any v6 link ?? many thanks.
edit:for example i will probably buy 2 x rx 460 as an addition to my rig at future ? what riser must i use ? min voltage must be what ?