2gb only shows as 1gb in bios and xp

i have this whiel running CPU-Z

Name Intel Celeron 346

Specification Intel(R) Celeron(R) CPU 3.06GHz

Memory SPD
-------------------------------------------------------------------------

DIMM # 1
SMBus address 0x50
Memory type DDR2
Module format Regular UDIMM
Manufacturer (ID) Apacer Technology (7F7A000000000000)
Size 1024 MBytes
Max bandwidth PC2-4300 (266 MHz)
Part number 78.01G86.9L5
Serial number 02009193
Manufacturing date Week 19/Year 09
Number of banks 1
Data width 64 bits
Correction None
Nominal Voltage 1.80 Volts
EPP no
XMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 3.0-3-3-9-12 @ 200 MHz
JEDEC #2 4.0-4-4-12-16 @ 266 MHz
JEDEC #3 5.0-4-4-12-16 @ 266 MHz

DIMM # 2
SMBus address 0x51
Memory type DDR2
Module format Regular UDIMM
Manufacturer (ID) Apacer Technology (7F7A000000000000)
Size 1024 MBytes
Max bandwidth PC2-4300 (266 MHz)
Part number 78.01G86.9L5
Serial number 02009193
Manufacturing date Week 19/Year 09
Number of banks 1
Data width 64 bits
Correction None
Nominal Voltage 1.80 Volts
EPP no
XMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 3.0-3-3-9-12 @ 200 MHz
JEDEC #2 4.0-4-4-12-16 @ 266 MHz
JEDEC #3 5.0-4-4-12-16 @ 266 MHz

Mainboard Model P4M800P7MB (0x0000027F - 0x1649AD70)

it also shows this

DMI BIOS
vendor Phoenix Technologies, LTD
version 6.00 PG
date 06/29/2006

DMI System Information
manufacturer DIXONSXP
product Ei 203
version unknown
serial 1G11000463025818
UUID 00155849-F27B2006-07280144-38000000

DMI Baseboard
vendor DIXONSXP
model P4M800P7MB
revision unknown
serial unknown

DMI System Enclosure
manufacturer unknown
chassis type Desktop
chassis serial unknown

DMI Processor
manufacturer Intel
model Intel(R) Celeron(R) CPU
clock speed 3066.0 MHz
FSB speed 133.0 MHz
multiplier 23.0x

DMI Processor
manufacturer Unknown
model Intel(R) Celeron(R) CPU
clock speed 3066.0 MHz
FSB speed 133.0 MHz
multiplier 23.0x

DMI Memory Controller
correction unknown
Max module size 32 MBytes

DMI Memory Module
designation A0
size 512 MBytes (single bank)

DMI Memory Module
designation A1
size 512 MBytes (single bank)

where the ram has turned into half the size. Ive heard that this could be because it only reads one of the sides of the stick? ive also heard that it might be my bios? to make this long msg short. somebody know whats wrong from what you see here? If not i got Everest and CPU-Z reports that i can copy paste if needed.

someone please help
10 answers Last reply
More about shows bios
  1. Do you test the system with one stick of RAM individually?
  2. what kind of windows are you running? 32 or 64 bit?
  3. Only are 2GB, the OS limitation star with 4GB.
  4. You have old components, some old components only will allow 1G.
  5. sure its a 2gb stick?
  6. saint19 said:
    Do you test the system with one stick of RAM individually?


    yes ive tested both. they both work. i thought it might be that its DDR2 and not DDR1
  7. dickcruz said:
    what kind of windows are you running? 32 or 64 bit?



    i have
    Microsoft Windows XP
    Professional
    Version 2002
    Service Pack 3

    does that help?
  8. daship said:
    You have old components, some old components only will allow 1G.


    what do you mean? i tested my mainboard and it said its 2GB compatible
  9. apache_lives said:
    sure its a 2gb stick?



    they are 2 1GB sticks, and theyre working when tested
  10. Wel, so. Test the RAM in another mobo, in dual-channel with primer 95 for at least 1 hour.
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