Where to get 50ns 72-pin SIMMs?

[Bamiga2002]

Hello. Looking for two 64MB or 128MB 50ns SIMMs (one-sided or flat 2-sided to fit a BPPC). Where to find those with a fair price? I've found a Kingston-model but they cost a fortune! :angry:

[doctorq]

How much is a fortune these days??

[meega]

Normally, that sort of RAM would only be found in high-spec servers or graphics workstations. I've got a couple, but I don't think they would fit... (they are quite big.)

[Effy]

Do you mean something like THESE 128 Mb modules  :-?
They are not flat but they have no problem fitting a BPPC as you can clearly see on the pictures  :lol: (though they are a bit dated to be honest)

[countzero]

how about here?

[meega]

I don't think so, Effy, as they are clearly stated to be 60ns.

[Effy]

True, but the only 50ns 128 Mb EDO modules I have found so far appear to be 144 pins instead of 72 pins. It´s confusing that they call that EDO too  :madashell:

[meega]

As I say, I have a pair of 72-pin 50ns RAM modules, HP branded, from a server. They are old, and big - lots of chips, double-sided, and tall. I don't think they will fit...

Your modules might be the best option, Effy.

[AmigaMance]

@Bamiga2002
 They are pretty rare. Do you have any valid information that 50ns SIMMs works faster than 60ns ones on a BPPC or you just assume that they do?

[Effy]

I have never seen those 50 ns modules in 128 Mb though I have noticed in the past that my ex-Microbotics 1230XA had an option to use 50 ns modules. Maybe they can be found in 32 Mb, never searched for that I think ...

[TjLaZer]

Which do BliZZard cards take 2k or 4k refresh SIMMs?

[Effy]

Forgive me my lack of knowledge but what does it mean and what is the difference between 2k and 4k  :-?

[amigakit]

Be careful with old Server SIMMs - some are 3.3v and could damage your Amiga accelerator.

Always check that the SIMM can be used at 5v.

[meega]

Effy wrote:
Forgive me my lack of knowledge but what does it mean and what is the difference between 2k and 4k  :-?

I think that would be the page sizes for Fast Page Mode (FPM) simms, i.e. 36-bit modules, rather than 32-bit. They are compatible with some expansion cards and MMUs.

And, edit: Why do you think there are 72-pins on a standard simm?

[meega]

TjLaZer wrote:
Which do BliZZard cards take 2k or 4k refresh SIMMs?

I believe that they could use either, but 2k page size would be default (if using suitable ram).

At the moment my Blizzard MkIV 68030 50MHz card (which does have a working mmu on the chip) has a normal 32-bit 60ns simm, and works fine.