When i flashed my Maximus to the Rampage one, i had problem with running PL7 + PHASE Enabled at FSB 450 with RAM at DDR1180 (333 Strap)
I had tested PL7 + disabled vs PL8 + Enabled and found that the second gave me better results, so i have keep that.

Now with this bios ( i have put SoLoR's moded) should i go test the PL7 + Enabled (or Even PL6 +Disable)?
Or is the problem only hardware , since i remember that Rampage X48 is a handpicked X38 capable of running with tighter memory timings?