Callahan wrote:

Last, first from the right; Here's the pearl: Universal 5v/3,3V edo unbuff ecc Full hires, use right click, view image, take a l […]
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Last, first from the right; Here's the pearl: Universal 5v/3,3V edo unbuff ecc
Full hires, use right click, view image, take a look for nothes.

Wow, never knew universal notched DIMMs existed!

Why not? Most of EDO chips are universal 5V/3,3V so dimms/simms with these chips must exist 😉

Callahan wrote:

Why not? Most of EDO chips are universal 5V/3,3V so dimms/simms with these chips must exist 😉

"Universal 5v/3.3v"
Chips are not.
Modules could be done but probably weren't due to PCB space and cost.
Motherboards can be.
.

on my own forum im able to add a width property to the IMG embed [img width=500]
to constrain the size to one that fits on the screen..

ive seen a number of posts where the photos are too large to be viewed..
it would be great if the sites admins might think to enable this ability.

Callahan wrote:

Ain't right; proof:

What does that mean?

Callahan wrote:

How can it be, some modules both: buffered and unbuffered.

It can't. No one said it could.
I think you are confusing buffered with ECC. They are not the same thing.

Callahan wrote:

Look at this, from left:

3,3V sdram, unbuffered non-ecc -- Yes
5V Edo buffered ecc (buffer chip) -- No. It's 3.3v as per the key and specs for the KM44V4004BK chips on it.
5V Edo unbuff ecc -- No. It's 3.3v as per the key and specs for the 5165805FTT-5 chips on it.
3,3V edo unbuff ecc -- Yes

Last, first from the right; Here's the pearl: Universal 5v/3,3V edo unbuff ecc
The reference I posted was a reply and as per the discussion it applies to industry standard 168-pin SDRAM.
That module is clearly not industry standard RAM and it's not 168-pins.
It's proprietary. Might not even be for a computer.

These modules are fully working pc modules:
3,3V modules works with compaq proffesional workstation 5000 (dual ppro)
5V modules works with compaq proffesional workstation 5100 (dual pII)
These machines are strictly design for only 3,3V or 5V modules.
That last universal voltage work with these two machines without problem but it can't mix unbuff with registered/buffered.

Specs for universal module(micron tech)
http://html.alldatasheet.com/html-pdf/75896/M … 4LC4M4E8DJ.html

Second from left got register chip on module. It is a registered module (buffered)
I think You are using SDRAMs nomenclature but these (exept one) modules are DIMMs not SD-RAMs! Dimms it is not same that SDRAMS.
Even Wiki says only sdram and pictures nothes for sdrams, not first type dimm with edo/fpm modules.
I'm using practice not theories. As I see You do not distinguish between dimm and sdrams.
Edit:

Where did You saw that it's not a 168 pin module???
Compared to dimm 168p EDO , second compared to standard SDRAM 168p.

Callahan wrote:

These modules are fully working pc modules: 3,3V modules works with compaq proffesional workstation 5000 (dual ppro) 5V modules […]
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These modules are fully working pc modules:
3,3V modules works with compaq proffesional workstation 5000 (dual ppro)
5V modules works with compaq proffesional workstation 5100 (dual pII)
These machines are strictly design for only 3,3V or 5V modules.
That last universal voltage work with these two machines without problem but it can't mix unbuff with registered/buffered.

Specs for universal module(micron tech)
http://html.alldatasheet.com/html-pdf/75896/M … 4LC4M4E8DJ.html

Second from left got register chip on module. It is a registered module (buffered)
I think You are using SDRAMs nomenclature but these (exept one) modules are DIMMs not SD-RAMs! Dimms it is not same that SDRAMS.
Even Wiki says only sdram and pictures nothes for sdrams, not first type dimm with edo/fpm modules.
I'm using practice not theories. As I see You do not distinguish between dimm and sdrams.
Edit:

Where did You saw that it's not a 168 pin module???
Compared to dimm 168p EDO , second compared to standard SDRAM 168p.

Strange how one of the modules in the top pic has the number "85" next to one of the pins (left top corner when viewing the pic) and in one of the bottom pics another module has the number "84".

84 * 2 == 168, but 85 * 2 == 170?

But at least these modules are strange 😁

Callahan wrote:

These modules are fully working pc modules: 3,3V modules works with compaq proffesional workstation 5000 (dual ppro) 5V modules […]
Show full quote

These modules are fully working pc modules:
3,3V modules works with compaq proffesional workstation 5000 (dual ppro)
5V modules works with compaq proffesional workstation 5100 (dual pII)
These machines are strictly design for only 3,3V or 5V modules.
That last universal voltage work with these two machines without problem but it can't mix unbuff with registered/buffered.

Specs for universal module(micron tech)
http://html.alldatasheet.com/html-pdf/75896/M … 4LC4M4E8DJ.html

Second from left got register chip on module. It is a registered module (buffered)
I think You are using SDRAMs nomenclature but these (exept one) modules are DIMMs not SD-RAMs! Dimms it is not same that SDRAMS.
Even Wiki says only sdram and pictures nothes for sdrams, not first type dimm with edo/fpm modules.
I'm using practice not theories. As I see You do not distinguish between dimm and sdrams.
Edit:

Where did You saw that it's not a 168 pin module???
Compared to dimm 168p EDO , second compared to standard SDRAM 168p.

Actually, if you look at the datasheet, the chips are marked LC, meaning 3.3v. The fact that they functioned at 5v for any length of time is impressive. The wide notches are most likely because the manufacturer (lite on?) didn't care about specs and figured it was "good enough", or it's for a special application like PCBONEZ said. It may work at 5v, but I certainly wouldn't trust it for any length of time.

Tetrium's right though, it certainly is a strange module.

Callahan wrote:

Where did You saw that it's not a 168 pin module???

My mommy and daddy taught me how to read and count around 50 years ago.
I would give you a referal but they aren't taking new clients.

It's completely beyond me why in a thread about wierd RAM you would go out of your way to make a really cool weird non-PC proprietary module look like normal PC RAM, but that appears to be what you are doing.

Image 1 - Your first photo reduced to a forum-reasonable size.
Discussion below it.

The one on the right is this so-called universal voltage module that you claim works in both 3.3v only and 5v only systems.
As will be shown it is not universal voltage. - And those systems are both 3.3v.

From left to right

Standard 168p 3.3v PC100 SDRAM Unbuffered no-ECC
Samsung KM44S4020CT-G10 chips [7ns] http://www.datasheets360.com/part/detail/km44 … 32912055409819/

Standard 168p 3.3v EDO Registered ECC
Samsung KM44V4004BK-6 [60ns] http://www.datasheets360.com/part/detail/km44 … 18457082961697/

Standard 168p 3.3v EDO Unbuffered ECC
Elpida 5165805FTT-5 [50ns] http://www.datasheets360.com/part/detail/hm51 … 66504921927109/

Standard 168p 3.3v EDO Unbuffered ECC
Toshiba TC5165805AFT chips [50ns] http://www.datasheets360.com/part/detail/tc51 … 51561956241239/

Next the one on the extreme right. - The supposed "universal voltage" unusual module.

Stanadrd 168p 3.3v EDO Unbuffered ECC - with non-JEDEC compliant keying
Micron MT4LC4M4E8DJ-6 chips [60ns] http://www.datasheets360.com/part/detail/mt4l … 92275925446271/
(The datasheet you referenced does not say they do both voltages. It says they can do either voltage. Read the whole thing.)
- The "LC" voltage code MT4LC4M4E8DJ = 3.3v - This is what is on the module.
- The 5v part is voltage code "L" MT4L4M4E8DJ - Not what is on the module.

My speculation is it was manufactured by a really cheap-ass company that didn't want to fork out the cash to have both 5v and a 3.3v PCBs made for their modules.

You claimed this 'universal voltage module' works in two systems that use different voltage RAM.
The thing is those two systems do not use different voltage RAM.

Callahan wrote:

3,3V modules works with compaq proffesional workstation 5000 (dual ppro) - Yes
5V modules works with compaq proffesional workstation 5100 (dual pII) - No

The Compaq Professional Workstation 5100 also uses 3.3v 168p RAM - see pic.

Image: RAM ads for Compaq Professional Workstation 5100

.

Rawrl wrote:

Actually, if you look at the datasheet, the chips are marked LC, meaning 3.3v.

Correct. Yes.

chrisNova777 wrote:

on my own forum im able to add a width property to the IMG embed [img width=500] to constrain the size to one that fits on the […]
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on my own forum im able to add a width property to the IMG embed [img width=500]
to constrain the size to one that fits on the screen..

ive seen a number of posts where the photos are too large to be viewed..
it would be great if the sites admins might think to enable this ability.

I agree with you.
I think part of the problem is that rather than uploading the photo he hyper-linked to it on another server.
I don't like that practice because if the other server or his account vanishes later on it ruins the thread here.
.

I counted all the pins and the size is similar, could very well be exactly the same. The strange module just looks larger but that's probably because it has chips on the other side (otherwise the module would've been 32MB EDO, like other EDO SIMMs with that many of that kind of chips).

The gaps between the 3 rows of pins is 4 pins on both modules

Flash Rom Simms

From top to bottom: 32mb, 64mb and 128mb

Almost identical to what PCBONEZ posted - 256MB double height PC100 SDRAM.

Some time ago I purchased a Chaintech 6via5t and with it come this strange module from Kingston:

It looks like if Kingston put two memory modules in one 😕 . The worst part is that the mobo only works wit this module (I tried many others without success), if it ever breaks...

Looks like very low density ECC Reg. SDRAM, maybe that is the problem. Regular double side (18 chip) 128MB ECC Reg. stick should work... in theory at least.

copados33 wrote:

Flash Rom Simms […]
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Flash Rom Simms

From top to bottom: 32mb, 64mb and 128mb

Not PC modules, but cool nonethless. What system are those used into? CPS3?

^ yes, it seems they are CPS3 modules , they are not even RAM - they are roms with the game data.

Old Cisco hardware uses a similar flash SIMM.

shiva2004 wrote:

Some time ago I purchased a Chaintech 6via5t and with it come this strange module from Kingston:
It looks like if Kingston put two memory modules in one 😕 . The worst part is that the mobo only works wit this module (I tried many others without success), if it ever breaks...

I found the specs for it. (KT18778)
256MB 168p PC100 CL3 36c 16x4 Registered ECC SDRAM
The oddity is the 16x4 chips.