Question Ineligible HW -- Possible different behavior of CPU -- EIST, VID and Processor Speed -- under Windows 11 vs Windows 10

BonzaiDuck

Lifer
Jun 30, 2004
16,429
1,933
126
I continue to use a utility called HWINFO64, still offered as a freeware download.

The computers -- I have one system with ASUS mobo, Z170 chipset and Kaby Lake CPU -- configured to Win 11 Pro. The other system has the WS version of the Asus Z170 board and a Sky Lake CPU.

The Sky Lake system is still running Windows 10 Pro -- assured for updates with the ESU subscription.

The Kaby Lake system received a successful installation of Windows 11 Pro using a single registry hack, and appeared to be running just fine, getting updates and so forth.

Now I look at how the voltages and processor speed(s) rise and fall. ALL of the "Tweaker" settings for both motherboards are identical. I had applied "Auto" option to the same settings, notably "Multi-core enhancement" and the feature that allows cores to be synched. The only fixed settings for both boards/processors were the DRAM voltage and VCCIO voltages, because I'm using G.SKILL DDR4 3200 RAM kits in both systems -- one using the TridentZ model and the other using the Ripjaws. But the RAM and its settings wouldn't affect the behavior I'm about to describe.

On the Windows 10 Sky Lake system, the VID and speed (Mhz) readings vary as we'd come to expect from a time just a year or two after the release of the processor and chipset.

On the Windows 11 Kaby system, the VID stays parked at 1.22V (plus or minus a sliver), and 4400 processor speed.

First, has anyone else noticed the difference in the Win 10 and Win 11 treatment of nearly identical systems? Second, realizing that some overclockers override the EIST and other features that allow the voltage and speed parameters to vary according to their specs, what are the implications? And why would the OS treat the processor differently, except of course that these two models just preceded the Coffee Lake -- which was the earliest processor in the Windows 11 "eligible" list.

Hyperthreading is turned on for both processors, and there are eight "processors" which show up under Device Manager's "CPU" item -- reflecting the HT. At this point, I am ABSOLUTELY SURE that EIST is enabled in the BIOS for both systems, but I will check again.

One more thing I might do is run the update on HWINFO64, having downloaded the installation file.

UPDATE: DONE THAT. NO CHANGE. The Kaby and Sky processors should behave the same. I checked the EIST and other settings, but they are identical between the two systems.

SO AGAIN! Anyone else -- if you were equipped to notice this -- DID you notice it? And also again -- what are the implications? Perhaps I should revert to using Windows 10 on the Kaby system, but it is otherwise behaving just fine. The temperatures are what you would expect, even if the CPU speeds are all "stuck" at 4,400 for all four cores.
 
Last edited:

BonzaiDuck

Lifer
Jun 30, 2004
16,429
1,933
126
FALSE ALARM.

I tweaked the Win 11 Power Management settings, and all is good again!

Thus -- so far -- Win 11 on Kaby Lake with Z170, TPM 2.0, UEFI and Secure Boot -- is working perfectly.

Sorry for pulling the fire alarm lever on this!
 
Last edited:
Jul 27, 2020
26,811
18,460
146
I personally don't run my desktop systems all day long so I tend to prefer disabling EIST/Speedstep and clockspeed variation crap. Prefer the CPU going full tilt even when it's doing nothing. Much better responsiveness.

If you use ThrottleStop, you can usually unlock an Ultimate Power Plan too. Might be a few percent faster than the High Performance plan.
 

BonzaiDuck

Lifer
Jun 30, 2004
16,429
1,933
126
I personally don't run my desktop systems all day long so I tend to prefer disabling EIST/Speedstep and clockspeed variation crap. Prefer the CPU going full tilt even when it's doing nothing. Much better responsiveness.

If you use ThrottleStop, you can usually unlock an Ultimate Power Plan too. Might be a few percent faster than the High Performance plan.
Right now, Igor? I just want to assure myself that this Win 11 "repair-upgrade" to Win 10 works right on this hardware. I'm only "short" by the difference between Kaby Lake and Coffee Lake.

I took me and my cousin out to dinner tonight. I was explaining my developing anxieties. I worry about not being "connected" and in control. I could panic under the circumstances and pull the string on that new build I've got in the works. Freaking changes in the software market, with Microsoft's shenanigans -- makes me anxious.

So I can do any number of things as you suggest, but right now -- Is it working properly? It seems to be working properly. So . . . 2025 and 2026 seem to be "functionally secure". Then what?

I had two damn margaritas, and I almost wish I could have a third one. Had a big slab of Asada steak, beans, rice, guacamole, salsa and chips. I want for nothing at the moment, but that third margarita -- well -- I'm already feeling no pain . . .

Did I EXPLAIN TO YOU . . . that I run my systems all day long? I have to be able to return to my PC on the whim I might have between the TV news and some streaming movie, or between working in the garden and fixing dinner. So . . . . I leave one of them running.

Tomorrow I have to change out the fluorescent bulbs in the kitchen. I leave them on all the time, too . . . . Just another chore, I guess.

I should just sit down on the couch and feel fat and happy. What am I worrying about?
 
Jul 27, 2020
26,811
18,460
146
I could panic under the circumstances and pull the string on that new build I've got in the works. Freaking changes in the software market, with Microsoft's shenanigans -- makes me anxious.
I paid $800+ for my 9950X3D due to thinking about the impact of trump tariffs. I absolutely hate my decision now. It was not the right decision for me. I care a lot about one benchmark (Rapydmark) even though it's a silly and useless synthetic benchmark but as much as I tried to overclock the CPU with a 240mm AIO cooler, I couldn't get a score under 100 seconds. That disappointed me a lot. I may at some point get a really beefy 360mm or 420mm AIO to make my investment worthwhile but the current IPC of the CPUs isn't good enough for the performance I deserve for my dollars.

Nova Lake or Zen 6 may change that but I'll probably only be able to afford those in mid-2027 without wasting a lot of money and then something new will get announced in Q4 2027. I guess the prudent thing is to just suck up and stick with what I've got for at least three years.