Quote Originally Posted by revenant View Post
I would think inability to do this would be caused by the peripherals more than the mobo itself. but that's just my guess.
I have run ~140MHz with same graphic cards and same RAMs on X38 and X48 boards. I have tried IDE, SATA and SATA-connected SSD-drives (both RAID and not)

So I guess It is either board or CPU?

A simple way to find out is to ask people to test, let's say 110MHz PCIe with ATI 3850, 4850, 4870 4870x2 or nVidia 9600GT on X58 eXtreme or UD5...