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19 Posts

12-01-2015

Finland

30 Signins

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  • Posts: 19
  • Registered: ‎12-01-2015
  • Location: Finland
  • Views: 232
  • Message 1 of 3

Y540 i7 CPU slow (0.78 ghz)!

2019-10-12, 14:25 PM

It is a i7-9750H, brand new, but severely underperfoming. I installed a samsung 970 evo plus, still the same underperformance. Lenovo Vantage is missing all options for overclocking or performance adjustment.

 

Its Max Core Frequency is fixed at 0.8 Ghz (or 0.78 Ghz in Task manager) 

 

What do I do?

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19 Posts

12-01-2015

Finland

30 Signins

232 Page Views

  • Posts: 19
  • Registered: ‎12-01-2015
  • Location: Finland
  • Views: 232
  • Message 2 of 3

Re: Y540 i7 CPU slow (0.78 ghz)!

2019-10-12, 17:08 PM

I found the solution!
https://forums.lenovo.com/t5/Gaming-Laptops/Lenovo-Legion-Y720-CPU-stuck-at-0-78-Ghz-all-the-time/m-p/4018041/highlight/true#M15204

oh wow, it's incredibly simple, but it took me whole day to find it.

 

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19 Posts

12-01-2015

Finland

30 Signins

232 Page Views

  • Posts: 19
  • Registered: ‎12-01-2015
  • Location: Finland
  • Views: 232
  • Message 3 of 3

Re: Y540 i7 CPU slow (0.78 ghz)!

2019-10-16, 19:44 PM

Turns out it doesn't solve the problem. It will return to that state after 5-6 mins or working correctly.

It is a bug in the BIOS update, and Lenovo needs to fix it!

Disabling Hyperthreading has so far yieded longest running results, but for a brand new laptop with i7, this is totally unacceptable.

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