I'm running an Nforce 570SLIT-A v5.1 motherboard. There are four 5850s, on riser cables as I said in first post. The two that are working (I can tell because they get hot) are the ones on the x1-x16 risers. These show up in poclbm and aticonfig, and aticonfig shows temps and clocks for both of them. The other two, both on x16-x16 risers, appear under aticonfig --lsa but I can't see clock speeds or temps for them, and they don't show up in poclbm.