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I need help, does anyone know how to modify bios?

Joined
May 6, 2020
Messages
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System Name svf15n17cxb
Processor i7 4500u without power limitation 18w
Motherboard sony damaged
Cooling stock
Memory 8gb
Video Card(s) gt 735m oc
Storage a400 240gb 300 tflops xd
Display(s) 1080p integrated xd
Hello, I have an ideapad gaming 3 laptop and I would like to unlock the bios to unlock the undervolt of the cpu and the gpu, also to increase the tdp of the gpu from 50w to 60w
 
Did you try this guide?

 
Did you try this guide?

Yes, the cpu was unlocked but it seems to be slightly unstable, I also want to configure the gpu, I feel that its full potential is wasted because it only reaches 68c with peaks of 70c stressing it in furmark
 
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