Intel D525MW Product Specification - Page 33
Intel D525MW Manual
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2 2.1 2.1.1 Technical Reference Memory Map Addressable Memory The board utilizes 4 GB of addressable system memory. Typically the address space that is allocated for PCI Conventional bus add-in cards, PCI Express configuration space, BIOS (SPI Flash), and chipset overhead resides above the top of DRAM (total system memory). On a system that has 4 GB of system memory installed, it is not possible to use all of the installed memory due to system address space being allocated for other system critical functions. These functions include the following BIOS/ SPI Flash (4 MB) Local APIC (19 MB) Direct Media Interface (40 MB) Front side bus interrupts (17 MB) Internal graphics address registers Memory-mapped I/O that is dynamically allocated for PCI Conventional add-in cards 33