Supermicro X10SRA User Manual download pdf (Page 39)

Chapter 2: Installation

2-11

Notes

Be sure to use memory modules of the same type, same speed,

same frequency on the same motherboard. Mixing of memory

modules of different types and speeds is not allowed.

Due to memory allocation to system devices, the amount of

memory that remains available for operational use will be re-

duced when 4 GB of RAM is used. The reduction in memory

availability is disproportional. See the following table for details.

For Microsoft Windows users: Microsoft implemented a design

change in the Windows XP with Service Pack 2 (SP2) and Win-

dows Vista. This change is specic to the behavior of Physical

Address Extension (PAE) mode which improves driver compat-

ibility. For more information, please read the following article at

Microsoft’s Knowledge Base website at: http://support.microsoft.

com/kb/888137.

Possible System Memory Allocation & Availability

System Device Size Physical Memory

Remaining (-Available)

(4 GB Total System

Memory)

Firmware Hub ash memory (System BIOS) 1 MB 3.99

Local APIC 4 KB 3.99

Area Reserved for the chipset 2 MB 3.99

I/O APIC (4 Kbytes) 4 KB 3.99

PCI Enumeration Area 1 256 MB 3.76

PCI Express (256 MB) 256 MB 3.51

PCI Enumeration Area 2 (if needed) -Aligned on 256-MB

boundary-

512 MB 3.01

VGA Memory 16 MB 2.85

TSEG 1 MB 2.84

Memory available to OS and other applications 2.84

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 140 141

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Supermicro X10SRA User Manual Page 39