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Upgrading memory

By jsarinana ·
I have a Pen-mmx 166MHz computer which I would like to replace memory on or add memory too.
I know it has 4 72pin slots empty now, and 2 128pin slots with one filled with a 32mb DIMM
how do I find out what memory to purchase ? I'd like to stick with the 128pin DIMM option. I do not have any documentation on the board. I can see when booting the following:
Bios v4.51pg
when I pause as it is showing me the memory count I can see the following number at the bottom of the screen: 12-11-97-i430TX-2A591Dac-00

any suggestions how to go about getting the right memory for this computer ?

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Upgrading memory

by timwalsh In reply to Upgrading memory

Check out www.motherboards.org. They have some tools available that might help you identify your motherboard's manufacturer.

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Upgrading memory

by jsarinana In reply to Upgrading memory
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Upgrading memory

by pschuvie In reply to Upgrading memory

Unless this is a "name" brand computer and based on practical experience the most likely chip to be looking for would be the industry standard PC66 chip. However the industry standard PC100, which is more readily available, would also most likely work as they are generally backwards compatible to the PC66. Industry standard indicates a plain jane generic or name brand without ECC and other refinements.

Since your going to add memory you could always open the case and take out the existingchip and take it to a reliable experienced shop and have them help you decide.

I would also guess your going to max out at about 256 MB 2 128 mb chips - maybe even less. Also there may be settings on the motherboard that have to be changed and thus the challenge of finding some documentation for such.

Now since you opened the case, look around on the motherboard at all those markings, a bit of sleuthing and you just might find the mb identity or a string of numbers that when inserted into a good internet search engine could lead you to the manufacturer and documentation. However, keep in mind that this is a very old setup and the industry being what it is the mfg may no longer be around and documentation may come from some information others have created on websites. Still, it can be a fun challenge to "detect" the true identity.

hope this has helped

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Upgrading memory

by jsarinana In reply to Upgrading memory

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Upgrading memory

by TheChas In reply to Upgrading memory

Many of these first generation DIMM equipped boards had some strange memory limitations.

I have one that maxes out at 2 32MB DIMMs.
I have seen others that can use larger capacity EDO DIMMs than SDRAM DIMMs.
A friend had one that would only work with older style DIMMs.
(He took it in to a local PC shop, and they had to really dig until they found DIMMs that would work in it.)

My message, find a manual for the motherboard, or work with a dealer that will assist you in selecting funtioning RAM.

Also, if you are running Windows 9X, Stop at 256MB of RAM to avoid a Windows bug.

There was an article that stated that there is a performance trade-off on Intel 430 series chipsets when you increase ram to over 64MB.
As you increase ram, the chipset disables the cache memory.

Chas

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by jsarinana In reply to Upgrading memory

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by mdelyea In reply to Upgrading memory

Some of those older motherboards can only see half the memory on a standard pc66 or pc100 DIMM (you put in a 64mb DIMM and you can only access 32mb), so that is also a consideration. You can probably put at least 4 16mb EDO SIMMS in there or possibly 4 32mb SIMMS. If you decide to switch from DIMMS to SIMMS you may need to remove (or plug in) a terminator or set a jumper on the motherboard. You should examine the motherboard closely for more info about the manufacturer or part number (even check the underside).

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Upgrading memory

by jsarinana In reply to Upgrading memory

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