Then your mb setting ( have own features) or cpu run to hot for xfr to work.
If you are thinking that your cpu is bad go and RMA it. After you will get new one same thing can happen, but when you get that one it works great go and OC it.
XFR is not limited to TDP. It works when your cpu has some heat headroom. What is your cooler and can you run CBr15.
I don't know why are you guys making scene out of this, but all it matter is if you won silicon lottery. Maybe you can run 4,1GHz with 1,4-1,425V on load
I'm, uh, honestly not sure what exactly you're trying to say.
It is not an issue with temps or insufficient cooling causing XFR to not work -- I already solved that issue and posted my solution in this thread.
The heatsink I'm using was posted in the OP - a Scythe Kotetsu - and I wouldn't be posting CBr15 scores if I was unable to run it.
The 'scene' as you refer to it, was simply that the CPU was not running at the speeds it was supposed to, when all the conditions were available for it to occur. It ended up being a problem with all of the Windows Power Profiles -- even the AMD-provided "Ryzen Balanced" plan -- not being set up properly to have Windows leave threads clustered on one core, and instead letting it load balance across all cores. This constant switching of cores caused AMD's SenseMi thing to not be able to ramp up the clockspeeds fast enough to maintain its single-core XFR value before Windows moved the load away to another core, and thus single threaded performance suffered.
The only thing I'm wondering about now is whether or not it was going to be a good idea to allow the CPU to idle at around 1.4v, and was looking for thoughts -- again, hardly making a scene of anything; You either have an opinion on that, or you don't.
OP, thanks! I had this same issue and that program you suggested fixed it. Also did not have all the options under Windows 10.
I had tried going back many bios and tried different power plan, bios settings, different benchmark software. Nothing would bring back the 2 core turbo boost that I had seen originally when I first built this 1700x , msi b350 pro carbon build.
I believe 2 core precision boost went away after a windows update also. I don't always want a bios /uefI overclock as this msi b350 board won't down volt the board voltage when idle in oc mode, I think for o.c. stability reason. Had i known this i woukd have bought a different board and still may when the newer chioset come out. It loses some power saving functions.
Glad it helped. I can't say for certain whether or not it was due to a Windows update (perhaps the newest Fall Creator's Update messed with it?) because this is the first time I'm using Windows 10 -- I'm coming from my old system running Windows 7, so I can't compare anything.
As for downvolting -- as soon as you try to do anything to overclock it, as I understand it, the CPU enters 'OC Mode' and automatically disables all of that power saving stuff. This would be why people seem to try to OC via P-states instead, but it's debatable how much actual power you save.
Frankly, idle volts won't do much effect unless you could under volt and underclock everthing.
difference between idle power (undervolting + lower clocks) and OC fixed max ~ 1W per core. If you could undervolt and underclock SOC and DRAM + 90% efficient psu at 20-40W with itx. Well for normal PC doesn't matter since its basically almost never in idle. I did my own test with P-states and it was around 15W difference when I was doing nothing, if browsing etc. difference almost disappear.
From my brief and non-scientific testing (mostly watching numbers being reported in HWinfo) the power savings are about right -- barely any, if at all. Even with the CPU downvolting to 0.8v @2.1GHz idle, I only saw 'wattage' values go down about 1-3w on the CPU vs leaving it to idle at 4.0GHz and 1.4v.
The only thing really was that it was being fed 1.4v constantly while idle (when loaded, it drops to around 1.15v or so) worried me, since I typically remember 'max' vcores for CPU's being around the 1.4-1.45v range before bad stuff starts happening. If it was 1.35v I wouldn't be as worried, I suppose.
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