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Turbo Boost Functionality on Battery (DC) Power - ThinkPad W520

On ThinkPad W520 systems, users have reported decreased system performance and the lack of Turbo Boost functionality while running on battery (DC) power.


Affected configuration

All the following ThinkPad system running on all Operating Systems:

  • W520



On battery (DC) power, the ThinkPad W520 is designed to put the CPU in Low Frequency Mode, disable Turbo Boost, and scale back the clock speed of the nVidia graphics chip because the overall system power consumption exceeds the available battery supply.
The AC adapter, however, does not have this limitation, and can offer full workstation performance as expected.

In order to get maximum performance from the ThinkPad W520:

  1. Update the BIOS to version 8BET46WW or later.
  2. Operate on AC power using the supplied 170W adapter.


Additional Information

Click here to download the Intel Turbo Boost Technology Monitor.

Only ThinkPad W520 systems are affected.

If you are unable to find what you are looking for, please do try the following options:
1. Lenovo Assisted Search
2. Product usage and general troubleshooting tips
3. Lenovo Support Forum
4. Technical Support Call Centre

Country Availability
Document ID : HT051664
Last Updated :
Copyright © Lenovo 2013, all rights reserved
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