Asus M2N-MX SE Plus & 4GB support.

Hi,

My motherboard does see my 2x 2GB Kingston modules during the BIOS POST test. However, when it displays the equipment overview screen, it reports less then 3gb memory in the "extended memory" overview. This is before Windows XP (32bit) is loaded. I have been doing some extensive searching into this "extended memory" limitation. I believe this to be my BIOS settings. So I am confinced (and I can be mistaken) that my problem is in BIOS as a memory misconfiguration.

I will attempt to insert photos (if this is possible on this forum) of my post screen tests of the PC booting.

All Asus documentation states it does support 4gb memory, and so it does seem so within the bios settings. But it goes wrong with the BIOS reporting less then 3gb extended memory. Can anybody give advice as to how to set the BIOS to report more then 3GB extended memory? I believe Windows XP simply follows suit as to what the BIOS offers. I even believe installing a 64bit OS, will not make the difference either untill this problem is resolved.

Here is my Mobo + Memory details.

================================================================================

Motherboard Information :
Manufacturer : ASUSTeK Computer INC. (Asus)
Product : M2N-MX SE Plus
Version : Rev x.xx
Support MP : Yes, 2 CPU(s)
Version MPS : 1.4

================================================================================

BIOS Information :
Manufacturer : American Megatrends Inc.
Version : 0503
Date : 03/26/2008 (mm/dd/yyyy)
Address : 0x0 on 1024 KB
Copyright : (C)2007 American Megatrends, Inc
Motherboard ID : 64-0503-000001-00101111-032608-MCP61-A0865000
DMI Version : 2.5

================================================================================

Memory Information :
DIMM0 : Empty
DIMM1 : Empty
DIMM0 (BANK0 ) : 2048 MB - DIMM
DIMM1 (BANK1 ) : 2048 MB - DIMM

================================================================================

Information SPD EEPROM (DIMM0) :
Manufacturer : Kingston
Part Number : 2G-UDIMM
Serial Number : A906967D
Type : DDR2-SDRAM PC2-5300 (333 MHz) - [DDR2-666]
Format : Regular UDIMM (133.35 x 3)
Size : 2048 MB (2 ranks, 8 banks)
Module Buffered : No
Module Registered : No
Module SLi Ready (EPP) : No
Width : 64-bit
Error Correction Capability : No
Max. Burst Length : 8
Refresh : Reduced (.5x)7.8 µs, Self Refresh
Voltage : SSTL 1.8v
Prefetch Buffer : 4-bit
Manufacture : Week 1 of 2008
Supported Frequencies : 200 MHz, 266 MHz, 333 MHz
CAS Latency (tCL) : 3 clocks @200 MHz, 4 clocks @266 MHz, 5 clocks @333 MHz
RAS to CAS (tRCD) : 3 clocks @200 MHz, 4 clocks @266 MHz, 5 clocks @333 MHz
RAS Precharge (tRP) : 3 clocks @200 MHz, 4 clocks @266 MHz, 5 clocks @333 MHz
Cycle Time (tRAS) : 9 clocks @200 MHz, 12 clocks @266 MHz, 15 clocks @333 MHz
Min TRC : 12 clocks @200 MHz, 16 clocks @266 MHz, 20 clocks @333 MHz

================================================================================

Information SPD EEPROM (DIMM1) :
Manufacturer : Kingston
Part Number : 2G-UDIMM
Serial Number : 90181C79
Type : DDR2-SDRAM PC2-5300 (333 MHz) - [DDR2-666]
Format : Regular UDIMM (133.35 x 3)
Size : 2048 MB (2 ranks, 8 banks)
Module Buffered : No
Module Registered : No
Module SLi Ready (EPP) : No
Width : 64-bit
Error Correction Capability : No
Max. Burst Length : 8
Refresh : Reduced (.5x)7.8 µs, Self Refresh
Voltage : SSTL 1.8v
Prefetch Buffer : 4-bit
Manufacture : Week 7 of 2008
Supported Frequencies : 200 MHz, 266 MHz, 333 MHz
CAS Latency (tCL) : 3 clocks @200 MHz, 4 clocks @266 MHz, 5 clocks @333 MHz
RAS to CAS (tRCD) : 3 clocks @200 MHz, 4 clocks @266 MHz, 5 clocks @333 MHz
RAS Precharge (tRP) : 3 clocks @200 MHz, 4 clocks @266 MHz, 5 clocks @333 MHz
Cycle Time (tRAS) : 9 clocks @200 MHz, 12 clocks @266 MHz, 15 clocks @333 MHz
Min TRC : 12 clocks @200 MHz, 16 clocks @266 MHz, 20 clocks @333 MHz

================================================================================

Memory Controller Information :
Memory Controller : DIMM, SDRAM
Number of connectors : 2
Supported Speed : 70ns, 60ns
Supported Voltages : 3.3v
Error Detection Method : 64-bit ECC
Error Correction Capability : None
Current/Supported Interleave : 1-way/1-way

================================================================================