NEC Express5800/S110R-1 Betriebsanweisung PDF herunterladen (Seite 42)

5-8

Series3800/S110R-1 (5015M-UR/5015M-U/5015M-NTR/5015M-NT) User's Manual

Figure 5-3. Installing DIMM into Slot

To Install: Insert module vertically

and press down until it snaps into

place. Pay attention to the bottom

notch.

To Remove: Use your thumbs

to gently push each release tab

outward to free the DIMM from the

slot.

Memory Support

The PDSMU supports up to 8 GB of unbuffered ECC/non-ECC DDR2-667/533/400

SDRAM. Interleaved memory requires modules of the same size and speed to be

installed in pairs. Do not mix DIMMs of different sizes and speeds. Notes: Due to

OS limitations, some operating systems may not show more than 4 GB of memory.

Due to memory allocation to system devices, memory remaining available for op-

erational use will be reduced when 4 GB of RAM is used. The reduction in memory

availability is disproportional. (Refer to the table below for details.)

Possible System Memory Allocation & Availability

System Device Size Physical Memory Remaining

(4 GB Total System Memory)

Firmware Hub ﬂ 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 System

BIOS & OS applications

2.84

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NEC Express5800/S110R-1 Betriebsanweisung Seite 42