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CPU stick at low speeds? Help!

My first thoughts are:

BIOS settings were erroneously changed and has limited the power to the CPU.

Alternative was the same was done in Windows via it's Power Settings, but if you've reinstalled Windows, that should no longer be the case. So thoughts remain BIOS was changed.

I would attempt to reset the BIOS and or update it to newest one and see if it continues.
 
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My first thoughts are:

BIOS settings were erroneously changed and has limited the power to the CPU.

Alternative was the same was done in Windows via it's Power Settings, but if you've reinstalled Windows, that should no longer be the case. So thoughts remain BIOS was changed.

I would attempt to reset the BIOS and or update it to newest one and see if it continues.
Post 16 the op updated the bios.
 
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Yup, updated bios, reset windows completely and still the same outcome. I’d say the cpu is screwed but it shows up at normal speeds in MB bios. Pulling my hair out here.
 
Yup, updated bios, reset windows completely and still the same outcome. I’d say the cpu is screwed but it shows up at normal speeds in MB bios. Pulling my hair out here.
Could be a duff cpu, Maybe pull the CPU and inspect the socket\pads.

When you updated the bios did it reset all the settings as well?
 
Righhhht.

Ok it’s fixed, and I’m not 100% sure on the root cause, but it does look like windows a power scheme was causing this, EVEN THOUGH I had checked and double checked this, AND completely resinstalled Windows twice (keep my apps and files/delete everything)

What did eventually get the cpu back to life was an app called throttle stop. This allowed me to force the multiplier back onto the power plan, and this has persisted over a reboot.

This is after failures using the following; bios adjustments, bios updates, bios rollbacks, windows update, windows reinstall, intel Xtreme utility (multiplier greyed out).

So if anyone stumbles upon this in the future, hope this solution works for you!

Thanks for all the suggestions and help
Happy Christmas!
 
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Nice. Glad it's been sorted.

Think the keep my apps and files might have kept that same power setting in Power Schemes because it's more close to how the system runs and so not to be deleted lightly unless user does it. But glad you confirmed it was there it was causing the problem (and having your own problem sorted).
 
Glad its sorted.

I would have done a clean install and not "kept my files" as if there was a possible virus on there it could just come back from the files kept (If infected) and restored the required files from a backup
 
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