I wasn't aware of problems with PCI cards on Sandy Bridge (until I bought an Asus P8Z68-V LX) even though there seem to be quite a few reports out there. No fix appears to have been developed (I have tried 3.1-rc10). The only thing to help is booting with irqpoll kernel parameter which seems to reduce the number of occurrences.

Most reports appear to be about Asus boards, but I did find one about an Intel DH67BL:
http://lists.centos.org/pipermail/ce...ry/104590.html

Some other reports, there are some links in them to bugzilla.kernel.org but of course they are impossible to read at the moment.
https://lkml.org/lkml/2011/6/30/197
https://lkml.org/lkml/2011/10/14/146
https://bugzilla.redhat.com/show_bug.cgi?id=713351
https://bugs.launchpad.net/ubuntu/+s...ux/+bug/877588
http://ubuntuforums.org/showthread.php?t=1676491