Toshiba Tecra M4 - Manual (Page 211)

TECRA M4 B-8
Display Controller and Modes
6.Click the nView Display Settings and point to PowerMizer.
(Multiple Monitors) and NVIDIA GeForce Go 6200 T...
The graphics processor is available in three options (Maximum Power
Savings, Balanced, and Maximum Performance) in each of the AC power
mode (AC Outlet) and the Battery power mode (Battery).