Some sort of weird explainable CPU throttling

[LeviBW]

To start off, this is the computer I am working with:

Dell Inspiron 15 (7537)
Processor Name: Intel Core i7-4500u @1.8 GHz, boost up to 3.00 GHz
Operating System: Windows 10
RAM: 16 GB
Graphics Card: Nvidia GeForce GT 750M
Storage Capacity (as Tested): 1000 GB
Resolution: 1920 x 1080
Graphics Memory: 2048 MB

 

Alright so this is the situation I am running in to. As you can see in the images attached when I start a stress test with Aida 64 my CPU usage goes up to 100% but my CPU does no boost up to it's maximum boost clock, this is the first interesting result I found. Notice that during this time both the CPU clock and temps are very stable, not much fluctuation.

 

After running the test for about 15 min. I allowed Aida 64 to stress my GPU as well. Once I did this my CPU temp. increased which is to be expected because it is a laptop and the heat of the GPU is most likely spreading to the CPU package. What is interesting is that once I enable GPU stress my CPU speeds drop dramatically and fluctuate significantly which then causes the CPU temps to fluctuate as well. What is strange about this is that when my CPU speeds drop no CPU throttling is being reported in Aida 64.

 

This is the part that I find the most confusing and interesting. After I stop the stress test my CPU usage goes down to less than 5% and my CPU temps. drop a solid 20 degrees, But my CPU speed actually goes up to much higher than it was during the test and almost up to what it's rated boost clock is.

 

If you have any idea why this is happening or what I can do about it please let me know.

 

[Electronics Wizardy]

Looks like your running into the power limits of turbo boost and the system. Nothing you can do. 

[iamdarkyoshi]

Might be throttling to keep total system load under control

 

Go into windows' advanced power settings and max everything. Be warned, this managed to kill my brother's laptop's ability to run on battery, it drew too much power