Re:Intel Processor Instability Causing Oodle Decompression F...
by scrlk on Friday February 23, 2024 @07:15AM
(#39479642)
* User is running a demanding application (e.g. game).
* CPU clock speed increases (turbo boost), as long as the CPU isn't hitting: 1) Tj_MAX (max temp before thermal throttling kicks in); 2) the power and current limits specified by the motherboard (in this case, effectively disabled by the out of spec settings).
* Weaker chips will require more power to hit or maintain a given turbo clock speed: with the power and current limits disabled, the CPU will attempt to draw out of spec power & current, causing issues for the on die fully-integrated voltage regulator (noting that there's also performance/quality variance for the FIVR), resulting in the user experiencing instability.
The CPU only draws as much power as it needs, though?
I mean, if you plug a 20 watt phone into a 60 watt USB-C power supply, or a 60 watt laptop into a 100 watt USB-C power supply the device doesn't get overloaded with power. It draws no more current than it needs.
The motherboard's power limits should state the amount of power the PCB traces and buck regulators are rated to provide to the socket - and if that's more than the processor needs that's good, as it avoids throttling.