Are laptop CPU temperature fluctuations normal?

Question

laptops

Ryzen 5 2500U processor, idle temperature jumps from 50 ~ to 70-75 degrees. When playing non-heavy online games like War Thunder, jumps up to 91-95 degrees are observed, when these temperatures are reached, statters appear, although the processor is loaded by a maximum of 70%. After replacing the factory thermal paste (the cooling system was also cleaned) on the Z5, the temperature dropped to 80 degrees, but this lasted only a week, everything is fine with the discrete one, the maximum temperature in the load is 75 degrees. What to do with it? Does it make sense to buy a stand? Notebook model: ASUS F570ZD-DM102

Answer 1

This is a delicate question, the fact is that throttling on the processor and on the VC occurs at different temperatures, as well as the operating temperatures for the VC and the CPU are also different ... for different components.
Modern VC and CPU in laptops, with the exception of some barebones Clevo models (in the Russian Federation they are now under the Dream Machines brand, not only) and Dell Alienware on desktop processors and MXM VC, are soldered. BGA
https://en.wikipedia.org/wiki/Ball_grid_array
At prolonged high operating temperatures, degradation of elements and soldering may be observed. On the other hand, the degradation of chips in the CPU begins at about 110 degrees Celsius, in the VK somewhere around 90 degrees Celsius (and given the fact that VK memory chips are 15 degrees hotter than the video core CPU ... the situation is even more interesting) .
The temperature values ​​for throttling are set before the maximum values ​​and for the CPU, depending on the version of the CPU, they average in the region from 90 to 100 degrees, for the VC 85-90 degrees for the VC CPU.
Those. Considering the fact that thermal paste/thermal pads are degrading and the radiator and the fan itself are clogged with dust, then, in my opinion, the normal maximum temperatures for a laptop, so that the hardware would work happily ever after:
CPU - under load up to 85-90 degrees Celsius
CPU VC - under load up to 80 degrees Celsius
And then it suddenly turns out that 80% of the laptop market do not fit into these requirements, due to rising prices for components and the desire for lightweight design and ultrabookness even for gaming machines.
What to do if there are problems with overheating, half-measures if the CO does not take out:
1. Turn off the turbo boost on the CPU
2. Replace the thermal paste and service the CO
3. Sometimes additional perforation of the case helps
4. Undervolting (with a small chance of getting a brick)
5. Stands and additional sleeves for sucking hot air from the outside are the least effective, but they also work.
In a good way, you need to change the laptop to one whose CO is pulled by the complete hardware or typical loads with the measures indicated above. The problem with your laptop is that the CO is common on the VC and the CPU, under load the VC heats the CPU and vice versa. There is also not enough metal and air flow to cool it with the turntables of this particular model. Hence the overheating. Separate CO in laptops for VC and CPU is not a panacea, but as a rule it is better than the combined one.
Modern Lenovo gaming laptops are on the verge of legion 5pro / 7 series laptops, the usual 5k overheats, Asus and MSI overheat without exception, Dell has normal CO only on Alienware with desktop processors, HP Omen is also on the verge, Acer Nitro 5 is an unsuccessful series, so so cheap. Barebones from Clevo/Tongfang represented by XMG/Hasee/Sager/Dream Machines and some others are traditionally good.

Answer 2

Jumps are ok.
Such a high temperature is not, but so with almost all laptops.