Why does my Dell Rugged 5424 CPU drop to 400 MHz when plugged in?
My Dell Rugged 5424 behaves normally on battery, with the CPU running around 3900–4200 MHz, although the batteries make a buzzing noise. About 15 seconds after connecting AC…
AC power issue
Why does my Dell laptop lock the CPU to 400 MHz when plugged in?
My Dell Rugged 5424 behaves normally on battery, with the CPU boosting to roughly 3900–4200 MHz. After connecting the OEM 90 W barrel charger, it runs normally for…