But if they stick em in 1st and 3rd... how do you get the crossfire bridge in? I'm sure the ones I've seen (and I could be wrong) aren't long enough to stretch across... then again I've never gone crossfire - I am intending to though.
ALl motherboards with alternate spacing of the pci-e slots come with their own extra long connectors, its not an issue, its FAR far better for cooling.
For instance in a "standard" design board you couldn't say fit zalman coolers to say your 6950's and have them fit, with the bigger spacing between full speed slots you can easily install better 3rd party cooling and fit two cards in. Or the stock cards simply get far far better cooling, lots of people have mentioned the 6950/70 have a very square heatsink design so two right next to each other gives pretty dang high temps on the higher card.
Nvidia have marginally recessed edges around the fan, so the shroud is essentially dipped so even two cards right next to each other have a little space for airflow, its still reduced airflow for the top card, and an extra slot is a far better method.
Obviously 4 was xfire has issues, even more with the single spacing between slot 3/4, but 4 way xfire/sli is like, 0.0000001% of the market, the few companies that make mobo's for that ultra high end market make a loss on them, R&D, production and selling often under a couple thousand.
This is more of a mainstream 2x xfire board. Would be nicer to see the spacing on lower priced mobo's, the Asus crosshair boards, or whatever the heck they are called, have the same spacing(their top 890fx board), great board but I could live without half the features and save £50 and have the same end user experience.