I have found what appears to be a pinhole in the heat pipe. My G3 3590 started running hot with the fans at full speed recently also.

I have same problem for my dell g3 3500 laptop. I got it hardly 1-2 months ago. All the drivers/BIOS are updated. Even then it make lot of noise and burns like volcano. Please reach out to me and arrange an engineer visit to my house asap to fix this for me. My service tag is :

Regards

Hari

Hi Team, were you able to solve for this issue? 

 i have bought a dell g3 3500 on july, when i gaming my cpu is running with 98-100C but the common temperature on other brands' gaming laptop are about 60-80 C at full fan speed , is it normal when i am having 100C on cpu everytime ? should i change new thermal paste ? or is there any solution so that the cpu runs below 90 C in gaming mode ?

i had the same problem:

turn off intel boost,

configure your game in alienware to cool,

lock fps in geforce at 60,

press G button.

this way my laptop stays cool and the temp stays below 80C.

fans run with G at 92% or without G 80% so less noise.

i run WOT at HD ultra without any problems so far.

note: i also have a cooling pad.

I know this has been marked as solved. I just wanted to give you my experience on my G3 3500. I was playing games and it would go to sleep because it would go into a thermal shutdown mode. I disassembled my laptop by removing the 9 screws on the bottom case. Then I removed the 8 screws holding down the heatsink. I cleaned off the OEM thermal compound (some of it which was dry cracking) and used some good thermal paste. In my case I used Thermaltake TG-7 which has a thermal conductivity of 3.3W/m-k. I went from hovering around 98-100 degrees and throttling like crazy to no higher than 84 degrees playing the same game. The fan also doesn't need to run at 100%. I no longer experience shut downs while gaming. Hope this helps.

I have the same dell and no problem i repast it after it arrives Thermal Grizzly Kryonaut my temps with no undervolting or something are at 60 and 70°c 75% fan speed i set it in alienware command center dont forget this is direct die cpu have no ihs on it u need to complett cover the dies with paste when its not it will make some hotspots and your gpu or cpu will die but i have the model with 10750h and rtx 2060