@Saga Lout, I believe JimmiG's post is worthy of reporting. Nothing there as been stated as opinion and you would not take that statement from someone claiming things about Intel technologies that simply aren't true, especially when he has several posts on Reddit about exactly the same thing and has been shot down with next to no discourse. If people started stating as fact that Kaby Lake didn't turbo because their home systems lacked the cooling to get turbo clocks you would delete those posts.
@JimmiG This update does not affect core parking or XFR in any way. Core Parking never disabled XFR, just the CPU was clocking up and down so quickly compared to Intel CPUs that most systems didn't spot it. You "discovered" this 8 days ago on Reddit.
https://www.reddit.com/r/Amd/comments/641hu3/amds_ryzen_balanced_profile_still_messes_with/
All I see is your thermal solution being limiting enough to kick the CPU out of XFR when 11 cores aren't sleeping.
That is the only difference in the power plan from a core parking perspective would be Windows avoiding cores that are parked in favor of cores that are not at 100% but loaded. Core parking is very important for laptops because that creates lower power draw, but you are recommended not to use it on gaming systems as it's equivalent to using deep sleep/hibernate on half the CPU and takes latency and heat to unpark cores. In a 12 core system your games will stutter quite badly as cores are unparked, and actually generate heat as half the job of a CCX to CCX transfer is done to all cores being unparked, stressing the IFab if 4+ cores are unparked at once but in a single threaded game that 1 or 2 cores may be able to XFR higher/longer (if your CPU is thermally limited) with core parking enabled because the other cores will be generating less heat (not much, but there's 11 of them). Funnily enough, the reason you could see XFR with core parking on is that Core Parking needs Windows input to know when to sleep, and Windows input slows down the entire power management system. This is why AMD still does not recommend it.
It has been confirmed multiple times that if Core Parking +or XFR is not disabled in BIOS they are always working. Funnily enough, by you and the people of Reddit, and yet you're obviously unhappy with the result because you have to come here and say the very opposite days later.
You started with this last month: https://www.reddit.com/r/Amd/comments/641hu3/amds_ryzen_balanced_profile_still_messes_with/
Then this:
https://www.reddit.com/r/Amd/comments/663ky3/ryzen_1800x_xfr_timespy_core_parking_on_vs_off/
You published these two slides as evidence:
http://i.imgur.com/xwxBfkx.png <--- CP Disabled, light aqua middle line is basically flat through first two tests but as a result work is distributed more evenly between cores and thus less XFR occurs. Remember without core parking latency all extra Windows tasks and threads will operate on other cores.
http://i.imgur.com/TwxTWw3.png <---- CP Enabled, light aqua middle line is clearly throttling as is choppy as if CPU is getting much hotter... Your temps are almost 10C higher on average so XFR will obviously not work as well.
Curiously enough the final CPU test on both still shows sudden thermal spikes when all 12 cores are in use for extended periods of time. This makes me HIGHLY suspicious of your data. 12 cores don't shoot up 10 degrees in a second or two after running the same workload for 20 seconds prior. Are you turning your CPU fan on and off? Is your water pump on your liquid cooler connected to your CPU fan socket? (It should be connected to a case fan port that is permanently at max, or a fan controller).
It's clear to see that your XFR was suffering down to thermals the second time around, there are clear spikes in your middle graph on the Core Parking Enabled example as your CPU XRF clocks until around 70C then disables XFR as it gets hot. Get a better cooling solution then test again. AMD Wraith etc are great, but they are still OEM coolers made to be "good" not "Overclockable".