Looks like someone broke NDA by posting a video that included 1800X's XFR setting.
You can see the XFR part roughly 17 minutes in.
I guess I'm slightly disappointed. In fairness, AMD did claim +100~200 MHz increments for XFR. I originally thought that meant the step size, but I guess that means XFR behaves more similarly to Intel's Max Turbo Boost 3 than a true self-overclocker. Will reserve 3rd party reviews before making final judgement; however, this combined with the 5.2 GHz LN2 run implies 8-core Ryzen does not have much overclocking headroom.
http://wccftech.com/amd-ryzen-overcl...os-benchmarks/
Having said all of this, let's not forget 4 GHz stock is still way faster than anyone expected for the 1800X - where stock v. stock it beats the 6900k.
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