dynabook Europe Support
Technical Support Bulletin

CPU (Processor) speed may be reduced on Portege X20W-D series in tablet, tent or clamshell mode


Decreasing CPU speed in high performance peak times, using CPU frequency throttling with the help of enhanced Intel Speedstep technology, may appear quite often when using the Portege X20W-D convertible in tablet, tent or clamshell mode.

Resolution (short):

Included in the release of BIOS Version 3.20, decrease of CPU speed in the mentioned display modes, has been
reduced to a minimum on Portege X20W-D series, enhancing overall performance of the PC.


To improve overall performance of the PC in tablet, tent or clamshell mode, 
please update the BIOS to version 3.20 or later.


Click to visit BIOS download page

2-in-1 Convertible | Screen modes as an illustration


Resolution (detailed):

- No further details available -


Document details
Document ID:
Doc Type:
Power Management
Online Date:
2019-09-16 00:00:00
Date Modified:
Dynabook Inc.
Product Category:
Product Group:
Product Series:
Portege X Series
Portege X20W-D
Model Number:
Operating System:
BIOS, CPU, CPU Stepping, Power Management, Touch Screen


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