5v or 3,3 volt SIMM's

[voyager]

A Small question about 72 pin sdram.

I am about to replace the defect socket on my derringer 030, before doing that I would like to test the existing socket with a other 72 pin sdram, just to make sure it is the socket and not the SIMM.

There are a lot of 72 pin SIMM’s out there but nobody tells if they are 5v or 3,3 volt.

I tried google but  I  can’t figure this out.

I seems to me that 5v 72 pin SIMM’s are the most common right? So the SIMM I pull from old pc main board is most likely to be a 5v one??

Or did pc’s 486 etc use 3,3 volt SIMM and did only amiga and some appel used 5v SIMM’s?

Or maybe 3,3 volt is only used in devices like printers etc.

I just want to make sure I do not blow up my derringer by fitting a 3,3 volt SIMM.
Kind Regards
Sebastian,-

[voyager]

Today I was going to replace the SIMM socket. A friend of my gave me some SIMM’s and I expected that the derringer board would say no dram found, but it did.

It now seems the 16 MB SIMM has a small fracture some ware.  I assumed that the seller of the card always used the card with this SIMM but its more likely he just put it in there and never checked.

So again thank all of you for the SIMM information ;-)

The Derringer has 9 GAL’s . The board is 16 years old now and the GAL’s will work for another 4 years after that its going to lose its programming.  Well oke not directly but the will fail.

I’am thinking, maybe it’s a good idée to make backups, this will be a lot of work  I have to remove all the GALS  en reading them with a eprom programmer and put them back on the board.

So what do you think, is it a good idée to make backups or not?