Mitac 7521+ with Ram recognising issue (soldered 256 MB)

Is your memory not fully recognized? (Intel VX chipset Memory recognition)
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Lt.Cmdr.Ivan
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Hi

I have a problem.

I replaced the Ram chips on the Mitac 7521+.

Originally it had only 128 MB of Ram soldered on the board. I replaced the original Memory modules (Hynix HY57V281620A) with larger ones (Infineon HYB 39S256160CT-7.5) from a new SDRam SOdimm Module that had the same pinout and voltage.

Now while the board runs perfectly (I already have tested the ram modules on board with the Memtest86+ programm and there were no errors) i have a small problem.

The board only detects half of the ram which means i am still stuck with 128 MB onboard ram.

Is there anyone out there who can give me advice on how to modify the bios (its a phoenix bios) to check for 256 instead of 128 MB onboard ram, or can tell me if there is a chip (the small inline configuration chip on the sodimm modules) i need to exchange to get the full ram working?

thank you very much for your help
cp
BIOS Guru
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Location: Germany

did you check if the memory chip density compatible with the chipset of the mainboard? please post some details about the mainboard and its chipset.
If you email me include [WIMSBIOS] in the subject.
Lt.Cmdr.Ivan
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The mainboard has a sis 630S chipset with Sockel 730 for Pentium 3 CPUs.


The complete specs are here:

ftp://ftp.lion.org/Notebooks/7521P/Hand ... kation.doc


Edit - Fixed link for the OP. KW
KachiWachi
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Location: Pennsylvania, USA

Hynix HY57V281620A datasheet

4 Bank, 2M x 16, 128 Mbit Technology

Infineon HYB 39S256160CT-7.5 datasheet

4 Bank, 4M x 16, 256 MBit Technology

SiS 630S specifications

128 Mbit DRAM - 16x8
256 Mbit DRAM - 32x8


Thanks.
Lt.Cmdr.Ivan
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Ok, now i see the problem, i've chosen a ram module which isn't supported or expected to be 128 Mbit technology regarding the sis chipset.

So i better check and choose a proper ram module that is organized in the 32x8 arrangement.

Thank you very much for your help. :D
KachiWachi
The New Guy
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Joined: Fri Mar 29, 2002 10:32 pm
Location: Pennsylvania, USA

NP.


Thanks.
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