No Asus board takes the optimum SPD timing from the internal timings table.
I wonder if this caused by Asus or Corsair or both.
It's pretty much the same with all motherboards no matter the manufacturer. The motherboard sets RAM and CPU to default(1333or 1066mhz depending on system) values to be able to successfully POST and boot normally.
There are no guarantees when it comes to overclocking. And that pretty much includes XMP. If your CPU/memory controller is not up to the task of overclocking then XMP will not work either. Albeit 1600mmhz is pretty much the norm now. And there are not many newer systems that will not run at at least 1600mhz without a problem. It's when you start getting upwards of 1866mhz that things CAN
become dicey. But they still will default to 1333mhz for at least the first boot.
I've had Vengeance RAM in my system and in the BIOS / UEFI AND AIDA64 it showed 1600 RAM running at 1600.
With the Dominator kit I just received, the UEFI and AIDA64 both show 1333 RAM running at 1600.
But you still would have had to enable the XMP profile or set your timings manually. They will both default to 1333mhz upon initial installation.