Originally Posted by Krobar
Congratulations. Was your systems stable with PCI-e 3.0 on Titan with SB-EP?
Also any idea what ISOC actually does? Supermicro recommends enabling it for HEDT and Audio platforms; does not seem to effect DPC on my setup.
Isoc is a mode of transmission between two QPI nodes (Isochronous traffic). It should be ON for 2P configurations, but it should be disabled for 12 core IvyTown 2P configurations. For CPUs with 10 cores and less, it should be ON in 2P configurations.
For HEDT platforms, it only make sense for the old Nehalem/Westmere CPUs which used QPI for connection with the IOH.
SNB-E and IVB-E HEDT parts do not use QPI links at all, as QPI is only used for connection between multiple CPUs and there is only one CPU, so it does not really matter for those parts.
I could not pair TITAN on my old SNB-EP @ PCIe 3.0 as I had B0 and C0 steppings in the past.
As for B0 SNB-EP I do not have those anymore so unfortunately I cannot test, but I am almost 100% sure it does not work since there were too many MRC changes for ASUS to bother to restore compatibility
@edit - I made a small mistake, Isoch should be OFF for 12-core parts only.Edited by psyq3212 - 8/19/13 at 2:08am