Toshiba Qosmio X70-B - Manual (Page 125)

Maximum brightness is only available when operating in AC power mode.
Screen will dim when the computer is operated on battery power and you
may not be able to increase the brightness of the screen.
Graphics Processing Unit (GPU)
Graphics processing unit (GPU) performance may vary depending on
product model, design configuration, applications, power management
settings and features utilized. GPU performance is only optimized when
operating in AC power mode and may decrease considerably when
operating in battery power mode.
Total Available Graphics Memory is the total of, as applicable, Dedicated
Video Memory, System Video Memory and Shared System Memory.
Shared System Memory will vary depending on system memory size and
other factors.
Wireless LAN
The transmission speed over the wireless LAN and the distance over which
wireless LAN can reach may vary depending on surrounding
electromagnetic environment, obstacles, access point design and
configuration, and client design and software/hardware configurations.
The actual transmission speed will be lower than the theoretical maximum
speed.
Copy Protection
Applicable copy protection standards included in certain media may
prevent or limit recording or viewing of the media.
User's Manual 7-17