Scott Silva wrote: > Is bios up to date? > Does non zen kernel detect both processors? Bios is not up to date, rather not go anywhere near that considering I can boot to the gentoo-minimal CD and see all 4 cores. Unless I'm not understanding something there...please explain if so. I assume if the bios is working for 2.6.16 gentoo, it should be fine for centos 2.6.18. non zen kernel panics immediately on boot, 2.6.18-8.1.8 or 2.6.18-8.1.6.