We have seen the specifications of the X48 chipset a couple times here at Hardware Canucks so we won't bother re-hashing an older chipset. Instead we will simply present the ASUS Rampage Extreme specifications sheet. Keep in mind, the single biggest advantage to the X48 chipset over the P35/P4 chipset is the availability of dual 16X PCI-E 2.0 slots. This provides the ultimate in GPU throughput to the system. Arguments about whether dual 8X PCI-E 2.0 can cause a bottleneck aside, dual 16X PCI-E lanes is a guarantee for maximum potential.