SUPER MICRO Computer 6025B-UR user manual Possible System Memory Allocation & Availability

SUPERSERVER 6025B-UR User's Manual

modules of the same size and speed to be installed in pairs. You should 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 remain- ing available for operational use will be reduced when 4 GB of RAM is used. The reduction in memory availability is disproportional. (Refer to the Memory Availability Table below for details.)

Optimized DIMM Population Configurations

	Branch 0				Branch 1
Number of	Bank 1		Bank 2		Bank 3		Bank 4
DIMMs	(Channel 0)		(Channel 1)		(Channel 2)		(Channel 3)
2 DIMMs	1A	---	2A	---	---	---	---	---
4 DIMMs	1A	---	2A	---	3A	---	4A	---
6 DIMMs	1A	1B	2A	2B	3A	---	4A	---
8 DIMMs	1A	1B	2A	2B	3A	3B	4A	4B

Notes: i. “---“ indicates a DIMM slot not to be populated. ii. Both FBD 533 MHz and 667MHz DIMMs are supported; however, you need to use the memory modules of the same speed and type. iii. Interleaved memory is supported when pairs of DIMM modules are installed. For best performance, please install memory modules in both Branch 0 and Branch 1. iv. For memory to work properly, you need to follow the restrictions listed above.

Possible System Memory Allocation & Availability

System Device

Firmware Hub fl ash memory (System BIOS)

Local APIC

Area Reserved for the chipset

I/O APIC (4 Kbytes)

PCI Enumeration Area 1

PCI Express (256 MB)

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

Size

1 MB

4 KB

2 MB

4KB 256 MB

256 MB

512 MB

Physical Memory Remaining (4 GB Total System Memory)

3.99

3.99

3.99

3.99

3.76

3.51

3.01

VGA Memory

TSEG

Memory available to System BIOS & OS applications

16MB 1 MB

2.85

2.84

2.84

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