Question regarding PCI-E slots and riser types

[dustyprawn]

I have a motherboard with the following PCI-E slot combination: x16, x16, x4, x1.

For scrypt mining, is there any problem in using powered x1 to x16 risers in all of these slots with 4 cards? These seem to be the cheapest riser types available to me.

[sammart57]

I would think you wouldn't need powered risers for the x16 slots
I have a board with 4 x16 slots, and have been using unpowered risers for them for over a month now with no issues. (3x r9 280x power hogs)
I figure if the board was designed to power that many vid cards, there isn't a need for powered risers.

now for the x4 and x1, definitely use powered, I don't think the mobo can push enough power to those slots to power the cards properly..
but that is just my experience, i'm sure someone who knows better will be along to help out more.

[dustyprawn]

I would think you wouldn't need powered risers for the x16 slots
I have a board with 4 x16 slots, and have been using unpowered risers for them for over a month now with no issues. (3x r9 280x power hogs)
I figure if the board was designed to power that many vid cards, there isn't a need for powered risers.

now for the x4 and x1, definitely use powered, I don't think the mobo can push enough power to those slots to power the cards properly..
but that is just my experience, i'm sure someone who knows better will be along to help out more.

Thanks for the reply. I'll make sure to use powered risers for the x1 and x4.

Like I said though, the powered x1 to x16 type are the cheapest I can get by quite a bit. Can I use these in the x16 and x4 slots with no issue?

[dustyprawn]

Bump.