Where to get 50ns 72-pin SIMMs?

[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.

[Oli_hd]

Hello. Looking for two 64MB or 128MB 50ns SIMMs (one-sided or flat 2-sided to fit a BPPC).

A month ago I bought a load of simms (pimping out my A2632) and at the same time stuck a 128meg 72 pin simm in, when it turned up its a single sided 50ns gold plate beauty.
The down side is it was advertised as 60ns standard but it may be worth e-mailing the company to see.
I got them from aememory
Best of all it was only £13.99, free postage.
The 32 meg simms were good too. (60ns though)

I had a 50ns 64meg simm for a while, ended up giving it to a guy at LAG.

Anyhow when I get home I will sort the simm out and take a pic so you can see what its like.

[Bazzaq]

I can confirm that effy's simms work on the bppc. I have 2 of them.. No problems.

[spirantho]

I've got some 50nS EDO 64MB SIMMs here - standard height, double-sided. They're yours if you have £30 spare.

I've never been able to get them to work, but only because none of my accelerators support them - they just appear as 16MB modules in everything I've tried them in. I've never tried them in anything newer than an 030 accelerator, a CS-PPC (which doesn't support 64MB modules, unlike BlizzardPPCs) and a P200 PC.

I have no idea if they'll physically fit, but they're the same size and shape as any double sided 8MB or 32MB SIMM I've seen.

[Effy]

I do can tell that the first two 128 Mb modules I ever had bought came from a HP server model 9000. Who cares where they came from, they were 128 Mb EDO modules 72 pins, that´s all I needed to know, not ?  :-o Eh, major bummer  :lol:
I tried it in my untuned Blizzard PPC, started with one module, plugged it in and turned on the computer ... nothing happened during the first two secs ... then I noticed the smoke and the smell of something burning  :idea: It was then that I realized something was going wrong  :lol: Need I to say that my card and A1200 needed some heavy repairing  :-? Need I to say that I never bought any of those modules again  :-?

AmigaKit : I know that Amiga cards need 5V modules and that 3,3V can damgage something but I have seen auctions of a greek guy selling 128 Mb modules with 3,3V that appear to work on A1200 cards, at least according to him. Never tried on of those as I prefer not to toast any of my cards again   :lol:

[rkauer]

 I have a MBX1230xa and I've buyed a 128Mb SIMM from Effy last year. It came from Belgic to Brazil in FIVE (5!) days.

 Works like a charm in my "humble" 1200D (who will become a 1200T in a couple of weeks)...:-D

 I fix my MediTator passtrough this very day! Hooorra! :cheers:

[Effy]

This may sound dangerous but when you set the speed of the Microbotics 1230XA to 50 ns and use a 60 ns module, would that mean that you would toast the module or that you would have to use a heatsink for the module  :-?

[Bamiga2002]

First of all, thanks for the replys . Now should i get non-parity or parity simms? FPM or EDO? What's the difference?

@Oli_hd:
Was the 128mb memory you referred to AE15-128EDO?

[AmigaMance]

I find ignoring a much more irritating e-behavior than spamming, flooding or flamming. Seriously.

[rkauer]

Bamiga2002 wrote:
First of all, thanks for the replys . Now should i get non-parity or parity simms? FPM or EDO? What's the difference?

@Oli_hd:
Was the 128mb memory you referred to AE15-128EDO?

 Prefer FPM, without parity. If you find EDO with NO parity and your accel acepts it, run for it!

[Bamiga2002]

@AmigaMance:
I did read your post. I think 50ns is faster than 60ns, don't you?

[Oli_hd]

@Oli_hd:  Was the 128mb memory you referred to AE15-128EDO?

Hi, Yep thats the one.
Sorry I havent got around to taking a photo yet, I did sort the Simm out though and double checked, its double sided but its using the thinest chips (TSSOP like) which are only about 1.5mm tall tops.

On a side note I was going through my simm drawer and found most of my old old old 30pin simms are 60ns and I even have a small 72pin simm with -50 marked..

[Oli_hd]

Hmm sorry for the delay in posting these pics.. things have kinda got in the way a bit.

Ok, get ready for a photo explosion


The whole simm (Earthquake, honest.)

Ram chip (one of eight) showing the -5 speed grade

Pic of how thin the simm is.

Now I havent actually got anything to test the 50ns speed rating.. it could be that the chips are mislabled but still, cheap cheap cheap

edit---
Hmm Ive just stuck a multimeter on the Simm to check what its set up as (60ns or 50) and its been set to 60ns so I guess they are either using chips that failed the 50ns testing or they got to many returns from computers that didnt understand the 50ns timing. :-/
(another strange thing is the simm is set at 2/32meg... (pin 68 is ground and 67 is nc)

[Bamiga2002]

Thanks very much for the pics, these should fit a BPPC just 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.)

[Oli_hd]

How "tall" are the modules?

31mm from top to bottom, about 22mm above the centre of the locking hole (the hole drilled in the simm)

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.

The simm is made up from 16 chips, all rated at 50ns, there are no other components on the board (apart from surface mounted capacitors) but yeah, it could still be a 60ns simm