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Problem with SDRAM and unknown PIII board

Posted on 2003-02-20
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Last Modified: 2013-11-10
I have bought 128MD SDRAM PC133. Older RAM was 64MB PC100. I do not know anything about mobo but CPU is a PII. Problem is, when I install (only) the new SDRAM, BIOS shows half (64MB).

Does anyone know what could be the problem and how can I solve it?

thx in advance...

NOTE: SDRAM is ok, I have tried it elsewhere...
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Question by:EmreErdogan
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Kyle Schroeder earned 150 total points
ID: 7989013
The new RAM is using an incompatible density on its chips, or your board doesn't support 128MB modules (fairly unlikely).  See http://www.crucial.com/library/mb_vs_mb.asp (at the bottom) for information on density of memory modules.  usually the motherboard model is printed on the board (generally between or by the PCI slots)

You might be able to fix this via a BIOS update, but we'll need to know the motherboard vendor/model first.

-dog*
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Expert Comment

by:a_l_p_h_a_b_e_t
ID: 7990263
Actually I have seen this with older PCs.  You should make sure the RAM you installed is P100 (100 represents the memory's bus speed in MHz).  If you put in a P133, which is what all the new ones are nowadays, it will do a whole bunch of wacky things.

Also, with your MB, the easiest way I found to get the model number of the MB is find any serial number on the board itself (no chip numbers), and do a Google search with that number, plus the type of processor.  I have found the most unheardof board manuf. just because other people have problems with it.

Hope this helps!
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Expert Comment

by:Fdisk
ID: 7991487
I run pc133 ram on bx and zx chipsets (100mhz bus) with no problems so i find it not likely the problem and as dog said very unlikely your p2 board doesn't support more than 64meg. I have read bout the density problem and have had boards that said don't use ram with more than x amount of chips. Also I have seen ram that was defective but still worked with only half the chips good.  I would try in another board and check or try another 128 stick in your board.  
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by:EmreErdogan
ID: 7993379
I found out that the mobo chipset is INTEL 440BX. Sites like Kingston's say; problem is HIGH density RAM's. The 128MB I have bought is one sided with 4 banks (Also, its says 256Mbits on official site but I do not know what this means).

Does anyone know if it is possible to solve this problem with a BIOS update? I have looked around but could not see anything relevant...

Thx.
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LVL 16

Expert Comment

by:Kyle Schroeder
ID: 7996588
BIOS update may fix it, but you must ID the board first.
-dog*
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Author Comment

by:EmreErdogan
ID: 7999262
After reading and spending hours on the net, I am now sure that the problem is HIGH density RAMs. This problem seems to be caused by the fact that certain mobo's with Intel 440_X chipsets only support 128 Mbit memory banks. I could not find any solution to this other than buying a new one. (There are rumors about BIOS updates, but my TEKRAM board does not have such a thing I guess, or I could not find it).

Anyway, thx to all. Anyone needs a 128 MB PC133 RAM by the way. I am planning to sell it with a half price :)))

Best of luck in yout upgrades, people of the world...
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