Hardware problem or bloated OS/drivers?

[Tan3l6]

I use my main W10 installation for many years now. Couple of them have been Insider builds. Now the build is 21313.1000

Everything else seems fine, but RAM tends to run noticably slower on this OS, not sure if Insider build problem or not.

Secondary main branch 10 is normal, at least when concerning RAM speeds. What might be the cause?

I'll attatch Aida64 benchmark results of both. You guess which is worse.

 

Also the cache is much faster, and I have made many tests that show similar results.

[StDragon]

CPU microcode is delivered through both the BIOS and in the OS. It's possible there's a newer Intel microcode rolled up into that build that's causing the issue.

 

Other then that, maybe power management? Try and enable "Ultimate Performance" mode in Power Options.

from an elevated command prompt, run the following to make it available:

 

powercfg -duplicatescheme e9a42b02-d5df-448d-aa00-03f14749eb61

 

[Tan3l6]

11 minutes ago, StDragon said:

CPU microcode is delivered through both the BIOS and in the OS. It's possible there's a newer Intel microcode rolled up into that build that's causing the issue.

 

Other then that, maybe power management? Try and enable "Ultimate Performance" mode in Power Options.

from an elevated command prompt, run the following to make it available:

 

powercfg -duplicatescheme e9a42b02-d5df-448d-aa00-03f14749eb61

 

Used the duplicate scheme command, after power options to "ultimate performance" and restart still same dissapointing performance.

 

[StDragon]

According to their website, you can make a bootable USB flash drive that runs WoW64 to execute AIDA64 from.

 

https://www.aida64.com/support/faq/launch-aida64-cd-dvd-blu-ray-or-flash-drive

They don't say how though, maybe a violation of an MS agreement to provide help? Seems a hint is all they can give.

 

You can try making a WinPE or running it from a command prompt using a bootable Windows 10 installer USB media.

 

[StDragon]

You can also convert a Windows 10 ISO into a bootable USB drive using Rufus. So if you have older versions, you can test against them all for a cross comparison.

 

If you get around to it, let us know what you find

[Tan3l6]

OK I think I found the culprit - when "core Isolation" in the security option is enabled then the performance does go down. 

But I'd prefer a bit speed over some security bug.

 

The thing is - on secondary 10 the option can be flipped on or off.  On my main 10 (Insider) the swap button shows as if the "Core isolation" is disabled and a bug prevents it to be enabled. I think I have to go look up a registry "flip button"

 

Also the culprits actaully are Meltdown and Spectre.

[StDragon]

That would make sense given that Spectre mitigations do have a slight performance penalty. 

[Tan3l6]

Yup, and I think Disabling VT-x in BIOS helped to improve performance back up.