Where to get 50ns 72-pin SIMMs?

[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.)

[meega]

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

[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.

[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.

[meega]

If the chips say -5 then they should be rated to run at 50ns speeds - but that is not the same thing as saying that the whole module can operate that fast. It does, however, mean that it will not be the chips that are the restriction.

How "tall" are the modules? (not "thick" as shown in pic 3.)