https://www.reddit.com/r/Amd/comments/5wuz1..._tuning_leaked/https://www.pcper.com/news/Processors/PSA-A...ave-Wider-RangeAfter reading the thread on reddit and the pcpaper article (link above), and dig a little bit more searching I have found better understanding regarding XFR
which has never been explained properly by many reviewers. And there were some misleading info reported by many Youtube reviewers too.
XFR actually works on all Ryzen chip, not just X-versions.
1800X, 1700X and 1700 all have XFR. The difference is that 1800X and 1700X has 100MHz extra over normal boost, while 1700MHz is only 50MHz.
The way a boost and XFR works on Ryzen 8-cores is something like this
1800X
Base clock: 3600MHz @ 8 cores
Boost 1 : 3700MHz @ 8 cores
Max Boost : 4000MHz @ 2 cores
XFR : 4100MHz @ 2 cores (temp <60°C, cpu power <128W)
1700
Base clock: 3000MHz @ 8 cores
Boost 1 : 3100MHz @ 8 cores
Max Boost : 3700MHz @ 2 cores
XFR : 3750MHz @ 2 cores (temp <60°C, cpu power <128W)
Initially, early AMD reports mention that XFR is supposed to have no fixed limit, but in the end they decided to lock it at only 100MHz extra.
Some reviewers claim that max boost and XFR only works on one core, but if pcpaper article is correct then it should be 2 cores instead. One core max boost is probably due to buggy bios or unoptimized threads or something like that.
This post has been edited by soulfly: Mar 10 2017, 06:56 PM