Windows 10 Task Manager: CPU Speed Rises Above Maximum Speed when overclocking

1

I've seen the previous thread, but it's quite different as I've overclocked my cpu to 4.7GHz in UEFI keeping turbo boost enabled. Here's what the Task Manager is telling me:

Screenshot from task manager

The CPU shows up as 5.5GHz, but in Aida or CPU-Z it's properly 4.7GHz as it was set in UEFI.

Question is am I actually getting 5.5GHz speed because of turbo boost or is it just a bug and I'm running at 4.7GHz?

olokos

Posted 2018-10-03T03:28:57.477

Reputation: 21

I would suggest using Intel’s own monitoring tools: https://www.intel.co.uk/content/www/uk/en/support/topics/utility-tools.html

– James P – 2018-10-03T07:43:27.297

can you point me to a particular trustworthy tool? – olokos – 2018-10-03T22:00:02.267

@olokos Questions seeking software recommendations are out of scope here at SuperUser – Ramhound – 2018-10-04T05:34:02.753

@Ramhound James pointed only to a generic intel download page. I'm not asking for software recommendations, I'm asking for a way to properly check actual current frequency which CPU is running at. If you know an easy hardware way to find out CPU frequency - I'm open for suggestions. – olokos – 2018-10-13T15:15:59.227

@olokos - You asked for a trustworthy tool. I was reminding you that software recommendations are out of scope. There have been no close votes issued against your question, my comment, was simply reminding you what is within scope. – Ramhound – 2018-10-13T17:41:27.090

Answers

1

At the time that screenshot was taken, your CPU had dynamically overclocked itself to 5.5GHz.


Task Manager shows your CPU base speed is set to 4.7GHz, as you expected. The 5.5GHz is in fact the automatic overclocking (Turbo Boost, if you're using Intel); it is unlikely to last very long as it generates excessive heat. You may also see, at times when the computer is fairly idle, the current speed drop well below the base speed; on my machine (with a 4.0 GHz AMD chip, not overclocked beyond ), I've seen the current speed go anywhere from 1.6 GHz to 4.2 GHz, depending on load and CPU temperature. Intel chips do the same thing. Manual overclocking changes the base clock speed, which all dynamic over- and under-clocking is relative to, but you shouldn't expect the CPU to reliably run at the base clock speed unless you disable the dynamic frequency scaling behavior that all modern CPUs (and GPUs) have.

CBHacking

Posted 2018-10-03T03:28:57.477

Reputation: 5 045

All of what you've said I do know already. It is rock stable on 1.45v and I can do gaming/mining/building without a problem. I specifically enabled dynamic frequency scaling so it won't be at maximum clock at all times. I'm asking which clock is real, not for tips about overclocking although thank you. – olokos – 2018-10-03T21:59:14.927

@olokos Apologies, I thought I made it clear enough but looking back, I really didn't. My edit should make the answer to your question clear. – CBHacking – 2018-10-04T04:17:15.210

My cpu stays mostly above 5GHz although it's downclocking as it should when idle. What boggles my mind is that everywhere except for that spot it's showing up proper 4.7GHz, afterburner is showing up that clock speed aswell, but never going above 4.7. It's only showing up speeds below 4.7GHz. So basically 5.5GHz is actual turbo boosted clock speed that my CPU is running at and windows 10 task manager is the one which is actually correctly showing up the frequency? That would be amazing and would explain why I have to keep CPU@1.45V to be stable. – olokos – 2018-10-04T15:15:20.157

I tried disabling Turbo boost and setting fixed ratio to 55 with override voltage, but it wouldnt even post, just straight up overclocking failure; with ratio 50 it bluescreens just before showing up desktop - which leads me into thinking it's showing unrealistic values. Should I contact intel or microsoft about it? – olokos – 2018-10-05T23:36:18.277