Toshiba Qosmio X70-B - Manual (Page 123)

CPU performance in your computer product may vary from specifications
under the following conditions:
use of certain external peripheral products
use of battery power instead of AC power
use of certain multimedia, computer generated graphics or video
applications
use of standard telephone lines or low speed network connections
use of complex modeling software, such as high end computer aided
design applications
use of several applications or functionalities simultaneously
use of computer in areas with low air pressure (high altitude >1,000
meters or >3,280 feet above sea level)
use of computer at temperatures outside the range of 5°C to 30°C
(41°F to 86°F) or >25°C (77°F) at high altitude (all temperature
references are approximate and may vary depending on the specific
computer model - contact TOSHIBA support for details).
CPU performance may also vary from specifications due to design
configuration.
Under some conditions, your computer product may automatically shut-
down. This is a normal protective feature designed to reduce the risk of lost
data or damage to the product when used outside recommended
conditions. To avoid risk of lost data, always make back-up copies of data
by periodically storing it on an external storage medium. For optimum
performance, use your computer product only under recommended
conditions. Read additional restrictions in your product documentation.
Contact TOSHIBA technical service and support, refer to
TOSHIBA support
section for more information.
64-Bit Computing
64-bit processors are designed to take advantage of 32 and 64 bit
computing.
64-bit computing requires that the following hardware and software
requirements are met:
64-bit Operating System
64-bit CPU, Chipset and BIOS (Basic Input/Output System)
64-bit Device drivers
64-bit applications
Certain 32-bit device drivers and/or applications may not be compatible
with a 64-bit CPU/operating system and therefore may not function
properly.
Memory (Main System)
Part of the main system memory may be used by the graphics system for
graphics performance and therefore reduce the amount of main system
memory available for other computing activities. The amount of main
User's Manual 7-15