P4M800PRO-M2 - only 1 of 2 RAM modules detected

Hello all,

I have an ECS P4M800PRO-M2 with 2 x 1 GB RAM installed. However, the system memory is reported as only 1024 MB.
Does anyone know how I can get the system to make full use of the installed memory?

When running Everest or CPU-Z, both RAM sticks are detected. (Partial report from Everest below)


Motherboard:

      CPU Type                                          Intel Pentium 4 631, 3000 MHz (15 x 200)
      Motherboard Name                                  Unknown
      Motherboard Chipset                               VIA P4M800 Pro
      System Memory                                     1024 MB
      BIOS Type                                         AMI (10/04/06)


SPD:

  DIMM1: Kingston 1G-UDIMM
    Memory Module Properties:
      Module Name                                       Kingston 1G-UDIMM
      Serial Number                                     9A1A2A9Dh 
      Manufacture Date                                  Week 20 / 2008
      Module Size                                       1024 MB (1 rank, 8 banks)
      Module Type                                       Unbuffered
      Memory Type                                       DDR2 SDRAM
      Memory Speed                                      DDR2-667 (333 MHz)
      Module Width                                      64 bit
      Module Voltage                                    SSTL 1.8
      Error Detection Method                            None
      Refresh Rate                                      Reduced (7.8 us), Self-Refresh


  DIMM2: Kingston 1G-UDIMM
    Memory Module Properties:
      Module Name                                       Kingston 1G-UDIMM
      Serial Number                                     871A9F9Dh 

--snip-- everything else same as above
1 answer Last reply
More about p4m800pro modules detected
  1. joshivir said:
    Module Size 1024 MB (1 rank, 8 banks)

    That may be the problem. Check how many chips are on each module. If only eight chips per module, you need to exchange them for 2 rank modules (double sided) that have a total of 16 chips, eight on each side. e.g. Kingston part # KVR667D2N5K2/2G should work
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