Crossfire and bus speeds

I ordered another Radeon HD 6870 yesterday and I noticed my motherboard does support a crossfire configuration, but only with 16x and 4x speeds.

I bought another motherboard today, labeled as a dual 16x motherboard. It was, to my great disappointment, just 16x and 8x... So I returned it.

Now, I ran some tests when I reassembled my machine, and I got a 9 fps increase in Saints Row The Third with crossfire vs a single card... Which is dissapointing, to say the least.

Should I go back and get the 16x/8x motherboard again, will it yield more fps?

I can't find a 16x/16x motherboard anywhere...

pcie 8x has twice the bandwidth of 4x so you will see double the performance out of the card using that slot

only board that im aware of that has multi x16 lanes. yay intel be over priced. for the cost of this board alone you can switch to an amd 8350 with a asus 990fx sabertooth mobo.

good luck finding a cheeper dual x16  mobo though.

I keep reading that between 16x and 8x, the gain is so subtle it doesn't matter.

I already put $230 on another card, I want to know if I should look for a 16x/16x instead of making this purchase today. Every card I've looked at says "16x for single, 8x for dual", are 16x/16x motherboards hard to find?

GA-990FXA-UD5 for $150 no?

he has an intel i5 3570k

oh. then maybe a Gigabyte G1 Sniper 3? $280 (Man intel boards got some price on them...)

there is no difference between pcie 3.0 16x vs 8x because games don't utilize it

pcie3.0 8x    ==    pcie2.0 16x

most cards today do not utilize all of the pcie 3.0 bandwidth but they do utilize all of pcie2.0 bandwidth

reference: pcie3.0 is 2x faster than pcie2.0

Pointless to get multiple x16 lans with PCI-E 3.0 ATM, just got with a board that does 3.0 x8/x8

as long as your card is pcie 3.0 you're golden