Toshiba Portege M750 PPM75A-09U010 Users Manual AU/NZ - Page 57

Hardware, Utilities and Options Memory Module slot Video RAM 512MB, 1,024MB, 2,048MB or 4,096MB memory modules (DDR2-800) can be installed in the computer's two memory slots for a maximum of 8,192MB system memory. This computer can be equipped with memory modules of a maximum size of 8,192MB. The actual amount of useable system memory will be less than the installed memory modules. The amount of Video RAM available is dependent on the computer's system memory. Start -> Control Panel -> Appearance and Personalization -> Display -> Adjust resolution. The amount of Video RAM can be verified by clicking the Advanced Settings button in the Screen Resolution window. If your computer is configured with more than 3 GB memory, the memory might be displayed as approximately 3 GB only (depending on the computer's hardware specifications). This is correct because the operating system usually displays the available memory instead of the physical memory (RAM) built into the computer. Various system components (like the video adapter's GPU and PCI devices like Wireless LAN, etc.) require their own memory space. Since a 32-bit operating system cannot address more than 4 GB of memory, these system resources overlap the physical memory. It is a technical limitation that the overlapped memory is not available to the operating system. Even though some tools might display the actual physical memory built into your computer, the memory available to the operating system will still be approximately 3 GB only. Legal Footnote (Memory (Main System))*3 For more information regarding Memory (Main System), please refer to the Legal Footnotes section in Appendix H or click the *3 above. Power Battery pack Slice Expansion Battery The computer is powered by one rechargeable lithium-ion battery pack. This battery pack increases your computer's operating time when main battery pack is also installed. User's Manual 3-2