Latitude 7490 CPU Gets Extremely Hot

When you replaced the heatsink assembly, did you thoroughly clean all the heatsink compound/pad material, and apply a thin layer of new compound or new pads?

Thank you, yes.  I thoroughly cleaned everything so there was no residue from the old heatsink compound left, then I applied a new, thin layer of Arctic Silver compound.  

Any chance you kinked the heat pipe when installing the heatsink/fan assembly? Or, if you got it used, it was kinked by whoever removed it in the first place? I know I put an extra kink or two on my E7250 when performing the steps here: Intel Core i7-5600U CPU: Addressing queries about overheating on Latitude systems | Dell US

I realize that you have a different CPU, but their article sets a precedent. The article basically said that anything below 105C is "within the operating standards" on the i7.

Even with the added kinks in the heat pipe, my laptop runs better and thermal throttles less, but it gets very hot under synthetic loads (Prime95) and the fan ramps up pretty high during things like Windows Update.

In my case, I wouldn't be inclined to go through the laptop's disassembly process to try to replace the heat pipe again, since a lot of the photos I saw on eBay for replacements showed kinks in them anyhow. I used Arctic MX-4.

P.S. Just trying to add another datapoint.

Thank you for your response, ProblemSolver1.  I just installed a new fan assembly (with  new heat pipe) and made certain that there were no kinks/malformations of anything on the assembly before I installed it.  I used Arctic Silver MX-4 also after I cleaned off the old, dried paste form the CPU and GPU.  I am seeing temps of 98 to 100 celsius with programs or processes (such as backing up the SSD), unless I go into Dell Power Manager and select "Cool" from the selections available under the "Thermal Management" category.  At any rate, as several sources I've read say, 100 degrees celsius is too hot and will eventually damage the processors.