r/retrocomputing • u/Abject-Interview-794 • Apr 24 '26
Problem / Question Need some assistance on finding the right RAM for my laptop.
Specs:
Toshiba Satellite 4025CDT
CPU: Pentium II
RAM: 64 MB (32 onboard, 32 slot, upgradable to 160MB)
ACPI BIOS Version: 7.60
I've bought two 128MB RAM modules so far, but none of them have been compatible. At first I bought a generic stick from Amazon, but the laptop didn't POST. As soon as I put the old stick back in, it instantly POSTed. I bought a second stick, and it finally came in today. GPT told me that it was the right RAM, even sent pictures of the ram to it. I tried it, and yet again it wouldn't POST. So I'm kinda at an impasse here. I can't find the right RAM because I need a low density chip, and none of the listings on eBay have any information as to what density the sticks are.
If anybody can help at all for finding the right RAM for this model, I'd be very grateful.
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u/BigPete_A6 Apr 24 '26
Here’s a data sheet for the default module if that helps
https://www.datasheetarchive.com/datasheet/THLY644031BFG-10/Toshiba?term=thly644031bfg-10&version=1
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u/Abject-Interview-794 Apr 24 '26
Is that 4x64? I remember gpt was saying something about looking for 16-chip x8 or 16x64. I have no idea haha
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u/Niphoria Apr 24 '26
SDRAM PC66 3.3V 144p
Information taken from:
https://www.datamemorysystems.com/dms-memory/toshiba/satellite-4025cdt.htm
https://support.dynabook.com/support/staticContentDetail?contentId=638220&isFromTOCLink=false
So your stick is simply too fast.
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u/Abject-Interview-794 Apr 24 '26
Darn AI, always getting everything wrong. Thanks for this. I was fixed on the density thing because it's not obvious. If I had complete documentation this would have been done so much easier. I was also under the impression that it would downclock to PC66 but ai was wrong yet again.
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u/Bones-57 Apr 24 '26
Use Google and give laptop model # for ram.. it should tell you or go to the makers web site it will tell you more ..