Re: 2nd NIC is off on Asus M2N-SLI Deluxe (nForce 570 SLI MCP)
You stated that you "put msi=0 msix=0 in /etc/initramfs-tools/modules". Is that traditionally where your Linux distribution keeps its kernel module options, rather than modprobe.conf? Did you rebuild the initrd & reboot after making that change?
If you boot with hpet=disable does that have any impact?