Strange SDRAM DIMM

[goodpsusearch]

What exactly is this?

Has anyone seen something like this before?

[brethin]

Re: Strange SDRAM DIMM

Yep seen them before. Its just a 16 chip stick with all the chips on one side vrs 8 chips on each side.

[goodpsusearch]

Re: Strange SDRAM DIMM

Yep seen them before. Its just a 16 chip stick with all the chips on one side vrs 8 chips on each side.

It has chips on the other side too!

[mariushm]

Re: Strange SDRAM DIMM

Since it has 2 holes on the pin line, it's SDRAM. It has 2 x 8 chips so it's not ECC, it's regular sdram.
Since the chips are 10 ns rated, it's probably at some low frequency.. 133 Mhz, 128 or 256 MB SDRAM.

ps. double the size if it has on both sides... but they could have resorted to just using low capacity chips to save money.

[Old Thrashbarg]

Re: Strange SDRAM DIMM

Since the chips are 10 ns rated, it's probably at some low frequency.. 133 Mhz, 128 or 256 MB SDRAM.

10ns is PC66 or PC100. And that's actually a 64MB stick... those are the old 4Mx4 chips that were used on the very early SDRAM DIMMS.

[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.

[goodpsusearch]

Re: Strange SDRAM DIMM

It came out from an old Pentium2 PC.

[c_hegge]

Re: Strange SDRAM DIMM

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

[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

[goodpsusearch]

Re: Strange SDRAM DIMM

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

[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.
.

[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.

[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!

[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....

[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.

[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

[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
.
.

[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

Better pic from an old mobo manual...
.

[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