hey froxic, it depends on your CPU.
You can in no way compare memory clocks vs AMD systems, amd systems are just too good at it.
With ivy you need to see what your cpu can do max. Some cpu's cant even reach 1300. but 1200 or 1250 should be ok. Once you hit your memory MHZ limit go mess around with timings. It's not your kit at all, maybe try different CPU'S