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ph4nt0m
Joined: 01 Jan 2018
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Location: Europe
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 Posted: Sun Oct 03, 2021 3:26 pm Post subject: ph4nt0m: 256Mb SDRAM PC133 144-pin SO-DIMMs |
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Made by Axiom in 2005 or 2006 using eight Liberty 16Mx16 7.5ns chips per module.
Should be compatible with most SDRAM based notebooks.
$6 each or $10 for a pair
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Last edited by ph4nt0m on Sat Jun 28, 2025 9:48 pm; edited 1 time in total |
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Wasmachineman_NL
Joined: 04 Jul 2019
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Location: Netherlands
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| Posted: Sun Oct 03, 2021 3:52 pm Post subject: |
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| These aren't low-density/440BX compatible are they? |
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ph4nt0m
Joined: 01 Jan 2018
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| Posted: Sun Oct 03, 2021 3:59 pm Post subject: |
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Eight 16Mx16 chips constitute two 64-bit banks 128Mb each. That's what 440BX expects. Although I haven't got such a notebook to test with.
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Wasmachineman_NL
Joined: 04 Jul 2019
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| Posted: Sun Oct 03, 2021 4:10 pm Post subject: |
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| ph4nt0m wrote: | | Eight 16Mx16 chips constitute two 64-bit banks 128Mb each. That's what 440BX expects. Although I haven't got such a notebook to test with. |
Hmm, i'll take two shipped to AVICC then. |
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frag_
Joined: 17 Nov 2008
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Location: Estonia
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| Posted: Sun Oct 03, 2021 7:21 pm Post subject: |
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I've heard several non-success stories about 16Mx16 chip memory with 440BX (and zero successful ones),
one possible explanation was that most if not all 16Mx16 chips require 8k refresh cycle, but 440BX does not support it (only up to 4k).
But who really knows? Please test it. |
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H3nrik V!
Joined: 15 Apr 2014
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Location: Denmark
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| Posted: Mon Oct 04, 2021 1:33 am Post subject: |
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| Why this BX talk? Were there laptops made with BX chipsets? |
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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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| Posted: Mon Oct 04, 2021 2:07 am Post subject: |
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| H3nrik V! wrote: | | Why this BX talk? Were there laptops made with BX chipsets? |
There was indeed
For example the HP Omnibook 4150 and Dell Latitude CPT S600ST
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Wasmachineman_NL
Joined: 04 Jul 2019
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Location: Netherlands
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| Posted: Mon Oct 04, 2021 5:08 am Post subject: |
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| H3nrik V! wrote: | | Why this BX talk? Were there laptops made with BX chipsets? |
ThinkPad T2x up to the T22 were 440BX. |
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Calbris
Joined: 06 Feb 2019
Posts: 157
Location: Singapore
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| Posted: Mon Oct 04, 2021 10:16 am Post subject: Re: ph4nt0m: 256Mb SDRAM PC133 144-pin SO-DIMMs |
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| frag_ wrote: | I've heard several non-success stories about 16Mx16 chip memory with 440BX (and zero successful ones),
one possible explanation was that most if not all 16Mx16 chips require 8k refresh cycle, but 440BX does not support it (only up to 4k). |
Looks like you might be right. Years back, someone came to the conclusion that 8k refresh cycle modules don't work with the 82443BX - http://www.hit-karlsruhe.de/aol2mime/pcgz600tek_ram.htm |
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D.8080
Joined: 03 Apr 2006
Posts: 1474
Location: Italy
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| Posted: Mon Oct 04, 2021 10:47 am Post subject: |
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| Wasmachineman_NL wrote: | | H3nrik V! wrote: | | Why this BX talk? Were there laptops made with BX chipsets? |
ThinkPad T2x up to the T22 were 440BX. |
My T22 doesn't work with 256 modules.
Won't boot alone, not detected with a 128 module.
Only if slot1 is populated it'll boot along a 256 one (still undetected).
For the record: hynix hymd232m646c6-75 aa 256mb synch 133mhz cl2.5 |
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Wasmachineman_NL
Joined: 04 Jul 2019
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Location: Netherlands
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| Posted: Mon Oct 04, 2021 11:17 am Post subject: |
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| D.8080 wrote: | | Wasmachineman_NL wrote: | | H3nrik V! wrote: | | Why this BX talk? Were there laptops made with BX chipsets? |
ThinkPad T2x up to the T22 were 440BX. |
My T22 doesn't work with 256 modules.
Won't boot alone, not detected with a 128 module.
Only if slot1 is populated it'll boot along a 256 one (still undetected).
For the record: hynix hymd232m646c6-75 aa 256mb synch 133mhz cl2.5 |
In that case i'm out, thanks.
Speaking of 256MB SODIMMs, I had 512MB RAM in my T22's but it required low-density modules. |
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ph4nt0m
Joined: 01 Jan 2018
Posts: 812
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| Posted: Tue Oct 05, 2021 6:34 am Post subject: |
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I have dug up a few notebooks for testing.
First, a Dell Latitude C400. That's a P3-M 1200MHz with an Intel 830M made in 2002. Sure thing it works fine with this memory.
Second, a PowerBook G4 Titanium made in 2001. 500MHz PowerPC 7410, Apple proprietary chipset. Also works fine. Shows in sysinfo it's PC133 with 3-3-3 timings.
Next, an IBM ThinkPad A21p. I know that's a 440BX. It made my day. With two 256Mb modules, it freaked out saying "UNSUPPORTED MEMORY CONFUGURATION: Maximum memory size 256 MB. Shut down computer and remove extra memory." Yeah, sure LMAO. Extended memory test passed anyway, so the chipset takes it up just fine. I don't care WTF is wrong with this BIOS.
Last, a Compaq Presario 1234. That's a K6-2 266MHz based on an OPTi Viper Max chipset. Something like 430TX, also made in 1997. It takes 256Mb max using two 128Mb PC66 DIMMs, so with 32Mb installed on the board and one memory slot populated, it showed 160Mb and booted up nicely.
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frag_
Joined: 17 Nov 2008
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Location: Estonia
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| Posted: Tue Oct 05, 2021 6:54 am Post subject: |
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| What A21p does with one module installed, works normally? |
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ph4nt0m
Joined: 01 Jan 2018
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| Posted: Tue Oct 05, 2021 7:05 am Post subject: |
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| frag_ wrote: | | What A21p does with one module installed, works normally? |
Nope. Doesn't even beep. If I install a known bad module, it beeps. This IBM BIOS is fucked up.
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Calbris
Joined: 06 Feb 2019
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| Posted: Tue Oct 05, 2021 6:18 pm Post subject: Re: ph4nt0m: 256Mb SDRAM PC133 144-pin SO-DIMMs |
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An A21p with a Celeron is quite the odd sight, did this A21p had its original processor swapped with a Celeron? I'm wondering because factory A21p configurations, even Configure-To-Order models did not come with a Celeron. All of them were equipped with Mobile Pentium 3 processors.
I might be overthinking, but I believe your A21p is an A21e if it wasn't processor-swapped. That memory error shows up only on A21e models as far as I'm aware, and those are 440MX/82443MX-based machines which are limited to 256 MiB. |
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