Strange SDRAM DIMM

[PCBONEZ]

Re: Strange SDRAM DIMM

I wasn't sure.
I never heard of Schrodinger's RAM.
.

[Old Thrashbarg]

Re: Strange SDRAM DIMM

Yet after I showed the key is for Unbuffered U-235 still thinks it's Registered.

And that's exactly what I was making a jab at. I figured you were aware of the distinction, but U-235 apparently isn't.

[PCBONEZ]

Re: Strange SDRAM DIMM

Registered = buffered.

I'm aware of that.
Yet after I showed the key is for Unbuffered U-235 still thinks it's Registered.
.

[Old Thrashbarg]

Re: Strange SDRAM DIMM

So you are suggesting it's 'unbuffered-registered' RAM?

Huh... Schrodinger's RAM. Registered = buffered, so it's both buffered and unbuffered at the same time, until you turn it over or look closely at the keying...

[PCBONEZ]

Re: Strange SDRAM DIMM

The notches aren't wrong. - It's unbuffered.
.
So you are suggesting it's 'unbuffered-registered' RAM?
.

[Uranium-235]

Re: Strange SDRAM DIMM

It's not registered.

you might be wrong. i've seen reg sticks with two register chips on one side, so the reg chips might be on the other side

[PCBONEZ]

Re: Strange SDRAM DIMM

Better pic from an old mobo manual...
.

[PCBONEZ]

Re: Strange SDRAM DIMM

You can get a lot about what RAM is by where the keys are.
.
This is the OP's RAM with they 'codes' overlaid.
.
It's run of the mill 3.3v Unbuffered SDRAM.
.

[PCBONEZ]

Re: Strange SDRAM DIMM

It's not registered.
Would need one or two more IC's [which would contain the registers].
http://en.wikipedia.org/wiki/Registered_RAM

Some 440BX do take registered.
Look up Intel N440BX.
It takes either-or.

I've seen 30-pin modules with 36 chips to a module.
- And they weren't piggy-backed.
Very tall for a RAM module.

RAM like in the OP wasn't really that unusual back in the day but it was expensive so lower production.
They either piggy-backed or made them tall to get more RAM on the stick.

If you want to see something actually rare look up SIPP RAM module.
RAM modules with round pins. I once had a PC that used them.
Bugger to find those!!! [Even back then.]
[edit] Found pic.
http://en.wikipedia.org/wiki/SIPP_memory
.
.

[Uranium-235]

Re: Strange SDRAM DIMM

I've seen such things before with registered server memory. Infact I have a double height reg/ecc PC-133 stick with all BGA chips. might post a pic later, but from what i've seen double heights like that are usually server ram, I never even saw old P2's with double height

as I implied, its probably registered, and will not work on a 440BX

[dood]

Re: Strange SDRAM DIMM

Whoa! That's really cool!

Yep, like this - http://www.ebay.com/itm/M37S64A-15-O...-/370255160561

But with the newer memory chips.

[mariushm]

Re: Strange SDRAM DIMM

ram wasn't always so complex though.

here's something i still have in my desk... so simple times back then yet so expensive....

[shovenose]

Re: Strange SDRAM DIMM

I've also seen SDRAM with two chips on top of each other. At the time, there was no cheaper way to make high-capacity memory modules.

Whoa! That's really cool!

[dood]

Re: Strange SDRAM DIMM

I've also seen SDRAM with two chips on top of each other. At the time, there was no cheaper way to make high-capacity memory modules.

[PCBONEZ]

Re: Strange SDRAM DIMM

I used to have some like that.
The only reason they are uncommon is because back in the day modules like that cost in the 100's of dollars.
.
I've seen similarly 'stacked' modules in 30-pin and 72-pin RAM.
.

[goodpsusearch]

Re: Strange SDRAM DIMM

I tested the DIMM with Intel 440BX board and it didn't work.

[Uranium-235]

Re: Strange SDRAM DIMM

I've seen such things before with registered server memory. Infact I have a double height reg/ecc PC-133 stick with all BGA chips. might post a pic later, but from what i've seen double heights like that are usually server ram, I never even saw old P2's with double height

[c_hegge]

Re: Strange SDRAM DIMM

No, it came from a car. A Hyundai to be exact

[goodpsusearch]

Re: Strange SDRAM DIMM

It came out from an old Pentium2 PC.

[mariushm]

Re: Strange SDRAM DIMM

Yes, you're right. I stand corrected.

I remember now I had memory modules with 7ns chips at 133 Mhz on my first computer, an AMD K6-2 333 Mhz. So the 10ns should be slower.



The chip above is hy57v164010b ... so it's 64 MB @ 100 mhz.