Ok got a MSI K7N2-L, 1600+, 256 DDR 2100, I got it easily to 150X10.5 (multi not unlocked) but I am concerned about the Pci bus speed and I understand on this board the PCI bus is not locked. Right now at 150 it's at 37.5 which is ok but I am afraid to go much higher due to my Western Digital HDD's. Not sure they can take it as in the past I have coruppted files when overclocking. So am I right.. is the PCI bus not locked on this board, and also does maybe a 1/5 divider kick in at 166??? One more thing, using Sandra 2003 I cannot find the pci bus speed, seems like in past versions of Sandra it would list it along with a warning about it is to high??