I recall that the big (last) problem was setting the command rate to 2T. I eventually figured out that my ASUS board had a "geardown mode" enabled that always f

I recall that the big (last) problem was setting the command rate to 2T. I eventually figured out that my ASUS board had a "geardown mode" enabled that always forced 1T, so I turned that off and I've been at full speed since. Not sure if this will help you.