Quote Originally Posted by STaRGaZeR View Post
USB, SATA, etc. are connected to the ICH10. The ICH10 is connected to X58 via a DMI link. So whatever you plug into any USB or SATA will have the limitation of the DMI link, which is much slower than the QPI. Raising the QPI speed won't make any differencies for pheripherals. You don't need more for that anyways.
True ... I was generalizing, even PCIe does not have BW exceeding the QPI ... nothing you do, regardless to the QPI BW will help, the flow of information will be limited elsewhere. Although, I don't recall the BW for the DMI interface between NB/SB, it is probably faster than USB or firewire.

Same thing with HyperTransport. The link to the NB/SB chipsets are not the rate limiters, hence performance will only be retarded if one supresses the HT BW below the BW of the tested link.