MB does not see half the capacity of RAM module

Hi

Motherboard Intel CA810 (IBM PC 300GL 6288LKG) does not see half the capacity of 256MB SDRAM DIMM RAM module (8 x 32Mbit HYNIX HY57V840AT chips soldered on module).

Here is the listing from SiSoftware Sandra 2001 te (version 1.10.8.39) SIMM/DIMM/RIMM SPD Analyser tool:


SiSoftware SIMM/DIMM/RIMM SPD Analyser - Version 8.3x
(c) Copyright Catalin-Adrian Silasi 1998-2001
Distributed by SiSoftware (* DO NOT DISTRIBUTE *)
All Rights Reserved.

Part of SiSoftware Sandra(tm) 2001 Professional.
Not to be used/distributed outside the package.

1 SMB/i2c Controller(s) enabled

Ctrl 0, SMBus, Sys, IO 00005000h, Mem 00000000h, Drv Intel PIIX4 SMBus / compatible, Brd BX
Hex dump of SPD information
000: 80 08 04 0D 0A 01 40 00 01 75 54 00 82 08 00 01
016: 8F 04 04 01 01 00 0E 00 00 00 00 14 0F 14 2D 40
032: 15 08 15 08 00 00 00 00 00 00 00 00 00 00 00 00
048: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 12 D0
064: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
096: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
112: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 64 AF

Detailed information

No bytes in SPD : 128
Total No of Bytes : 256
Memory Type : SDRAM
No. Module Rows : 1
Module Data Width : 64-bit
Address Row/Columns : 13 / 10 bits
SDRAM Width : x8
Burst Lengths Support: page 8 4 2 1
No. Banks : 4
CL Latencies Support : 3
CS Latencies Support : 0
WE Latencies Support : 0
Cycle Time High CAS : 7.5ns -> 133MHz
Access Time High CAS : 5.40ns
Device Attributes : W1RB PreChrgAll AutoPreChrg
Min. Row Precharge : 20ns
Min. RowA to RowA : 15ns
Min. RAS to CAS Delay: 20ns
Min. RAS Pulse Width : 45ns
Module Size : 256MB
SPD Version : 1.2
Manufacturer Code : 00 00 00 00 00 00 00 00
Part No. :
Manufacturer Data :
Serial Number : 00000000
Intel Spec. Frequency: PC100
Intel PC100 Spec : CL3 CL2 ConAP

Standard spec. string info

256MB 8x(32Mx8) SDRAM PC133U-333-542 (CL3 upto 133MHz)


Any idea that could help? How about reprogramming "No. Module Rows" from 1 to 2?

TIA
5 answers Last reply
More about half capacity module
  1. what does your motherboard manual say?

    if it says something like 2 slots, 256mb or 3 slots 368mb then it may only let u use a max of 128mb per slot.

    or the stick could be malfunctioning. or the slot...

    Excuse me for a moment. I need to drive my ergonomic wheely chair over a sheet of bubble wrap!
  2. If it's identicle to the stock Intel motherboard, you may have better luck if you can flash it to Intel BIOS (look for a flash recovery jumper). IBM has some fussy memory requirements. It might not be a BIOS problem, but for free it's worth a try.

    What's the frequency, Kenneth?
  3. >>what does your motherboard manual say?

    Well, we don't have manuals for these machines (workstations). IBM ships them only with monitor and Windows 9x/ME manuals.

    >>or the stick could be malfunctioning. or the slot...


    No, it's not the stick. I have tested on other socket A motherboards 5 samples of a few hundred sticks that we have, and they work flawlessly.
  4. Hi

    We traced memory problem to DIMM having exactly 8 memory chips soldered. Our supplier will exchange them with memory sticks with 4 or 16 memory chips per memory module (4x512Mbit or 16x128Mbit memory chips soldered).

    Thanks for your time!

    Bye
  5. well it could be the ramslot then...

    and one on my machine i noticed it wasnt detecting the full amount of ram either, but that was at high overclock and hard ram timings.
    a small 5% VIO increase solved that problem.

    my guess is its the motherboard.
    poor contact or damaged ramslot

    Excuse me for a moment. I need to drive my ergonomic wheely chair over a sheet of bubble wrap!
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