Just crossfired but one card is only 8x

move em around in slots make sure you got he right 16 slot.

What motherboard is it? Most of the time, when the second slot is occupied, the Lanes change to x8/x8.

it should be the first card reads x16 if anything. That is weird.

I don't know how to get the second card to x16, but honestly, it should have plenty of bandwidth at x8.

Check what slots you have them in, you most likely have to have them in specific places.

My board gives me only 8x when I put my card, by itself, in the wrong slot.

Second and third slots were the best ones to plug them in.

I checked my bios but there was not setting in there.

Whichever card it is, it should be fine at x8. I don't know if it was a 4890, or if they had to go to the 5000 series, but when someone tested x8 vs x16, they only found about a 5% difference. That's why all those chips have gotten away for so long with reverting to x8/x8. It's only now that we're starting to get past it.

Now, it's certainly worth your while to figure out why your chipset isn't performing as expected, but don't stress out about your video card being 'starved' of bandwidth.

What color slots are you using? Are there instructions to use specific slots for x16+x16 mode?

Check your manual.

a 4890 in x8 is fine enough i am using it with a 4870 no worries

The first and third are the x16 slots. The second and fourth are x8

what tips sad! You put them in worng order to begin with lol