The fix for that issue usually is just increasing the PCIe frequency to 105 or 110, or in the case of some other MBs(eg. Gigabyte), increase the PCIe slot voltage. Not sure what else you can do..

Looks like I will be needing to upgrade my BIOS for proper Penryn support, even though I don't want to.. a 0.1V vdrop means the max vcore I can get is 1.6V right? I like 1.7V for benching.