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SLI Second Graphic Card is not Working After Updating to Windows 8.1 - IdeaPad Y400, Y500, Y410p, Y510p

After updating to Windows 8.1 and related Nvidia graphic card drivers, customers may experience the following symptoms

  • Second graphic card is not detected or SLI is disabled
  • Nvidia panel indicates only one graphic card instead of two
  • Can install the graphic card driver but SLI is not working
  • SLI is enabled with legacy drivers but performance drops


Affected configurations

The symptom above may occur to the following systems:

IdeaPad Y400, Y500, Y410p, Y510p


Under the following Operating systems:

Microsoft Windows 8.1 64-bit



Update the vBIOS to support the latest Nvidia drivers on the Lenovo support site.  This update will restore recognition of the second video adapter in the ultrabay and ensure maximum graphic performance, especially in demanding applications like 3D intensive games.

IdeaPad Y400, Y500:

NVIDIA GeForce GT650M Second VGA BIOS Update for Windows 8.1 (64-bit) 

NVIDIA GeForce GT750M Second VGA BIOS Update for Windows 8.1 (64-bit)

IdeaPad Y410p, Y510p:

NVIDIA GeForce GT750M Second VGA BIOS Update for Windows 8.1 (64-bit)

NVIDIA GeForce GT755M Second VGA BIOS Update for Windows 8.1 (64-bit)


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
Alias ID : IN20131031-001
Document ID : HT079946
Legacy Document ID : IN20131031-001
Last Updated : 16 May 2014
Copyright © Lenovo 2013, all rights reserved
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