Dell G15 5511 Overheating

Did you run a stress test using the Dell Support Assist application or a 3rd party software?

Please update BIOS (even if you have the latest version).

Install the Dell Power Manager (DPM) application from this link or Microsoft store. The new Dell Power Manager features allow you to access the Thermal Management option to adjust thermal settings based on your requirements

Please run a CPU & GPU stress test using Dell Support Assist & check if there is any thermal error detected.

Did you run a stress test using the Dell Support Assist application or a 3rd party software?

Please update BIOS (even if you have the latest version).

Install the Dell Power Manager (DPM) application from this link or Microsoft store. The new Dell Power Manager features allow you to access the Thermal Management option to adjust thermal settings based on your requirements

Please run a CPU & GPU stress test using Dell Support Assist & check if there is any thermal error detected.

Read through the, "FAQ Modern Standby".

To prevent this from happening follow the below steps:

1.Click Start button, click Control Panel, click System and Security, and then click Power Options.
2.On the Select a power plan page, click Change plan settings for the plan that you want to change.
3.On the Change settings for the plan page, click Change advanced power settings.
4.On the Advance settings tab, expand Sleep, expand Allow Hybrid Sleep, and choose OFF.
5.On the Advanced settings tab, expand Sleep, expand Allow wake timers, choose Disable for both when your computer is running on battery and when it's plugged in, and then click OK.
6.On the Advanced settings tab, expand USB settings, under USB settings expand USB selective suspend settings, choose Disable.
7.Select Apply and then OK to save the changes.

Check if the above steps work and reply.

Well I will suggest you to :

1. Check that the fans are working and you can also use a good Laptop Cooling Pad,
2. Improve airflow for your laptop.
3. Avoid using programs that use a lot of CPU power. 
4. Close unnecessary browser tabs and programs.
5. Clean and dust your laptop it might block the airflow in your system.

my fix: turn off intel speed step and leave intel speed shift on in bios. for some reason known to dell it worked in my dell g15 5511

Thank you everyone for suggesting solutions for overheating. I actually changed my laptop the next day and it is all okay. Temps never get above 95 on cpu under heavy load and gpu hotspot remains at 90 under heavy loads. I guess the earlier device was faulty. Or it may be because my new machine has AMD CPU instead of Intel. But it never thermal throttles no matter what type of load I throw at it. I live in country where in summer temperature gets upto 45°C so these temperatures are acceptable for me. But Intel variant gave me 100°C in winter.

I have this exact issue on my dell g15 5521. Gaming on valorant would make it go to 100°C. G mode had disappeared as well. I couldn't do game shift when gaming. The only thing so far that worked was when I did a hard reset.