Temperature
Unlike the
HP and both Acer notebooks the Inspiron did not remain particularly cool under load despite its massive thermal throttling. Even when idle the surfaces warmed up to 31 °C and maxed out at 47 °C under load at the bottom. Using the Inspiron on your lap under load is thus not advisable.
Fan vent behind the display hinge
The hot spot was located in the center towards the rear near the fan vents. To make matters worse the vents are half-way covered by the display hinge heating up the bottom portion of the display and causing a significant accumulation of heat.
AMD’s CPUs are very obviously not as optimized and efficient as Intel’s counterparts. However, that is only half the truth. The other half is Dell’s poor and thoughtless cooling solution that we already criticized when reviewing the similarly restricted
Inspiron 15 5575.
...
Our attempt to run our standard stress test of Prime95 and FurMark simultaneously for at least one hour was cut short after just a few minutes. The device crashed and rebooted, further confirming our suspicion that the cooling solution is simply inadequate for AMD’s Ryzen. Basically, the device shut off in order to protect the CPU and GPU from further damage. A second attempt with a smaller FurMark window was successful.
Clock speeds rarely exceeded 550 MHz from the very start of the test. The CPU was thus throttling severely in order to keep cool. Compare this intolerable frequency to the
Ryzen 3 2300U's base clock speed of 2 GHz! The GPU ran at around 400 MHz and thus far below the Vega 6’s theoretical maximum of up to 1.1 GHz. Temperatures and clock speeds settled after less than 10 minutes. The GPU ran at around 55 °C, just like during our gaming tests, and the CPU at no more than 350 MHz (!) on all four cores and a temperature of around 80 °C.