Question on old RAM

[Zardoz]

can you post a pic of the memory. most like going to be 80 to 120, sometimes you can look up the memory and get the specs.

really the different in speed on Amiga systems is not going to madder that much. if it's 80ms I would not fuss over it.

[Zardoz]

A bit faster then the system is good, the CPU won't have to wait!

30 or even 40 ms in ram is almost nothing,.. I would doubt if you would even perceive it old systems like this. mongo is also very correct with his statement.

old memory speeds does not act like today's memory.

[Zardoz]

basically you want to use memory at the speed the device is rated for or better. for instance lets say the card spec is to use 80ns memory.  you then should use 80ns our lower memory like 80, 70, or 60, as it will all run fine in that card. however putting in slower memory like 120ns can result in memory issues as the memory would not keep up with the demands of the card.

some older device had jumpers that you could set for the speed memory you was to use. like a settings for use of 120ns or 80ns this is so you could use almost use any memory you have or could get as long you could set it.

now days memory speed is handled much differently and more automatically with out the use of manual jumpers.

[Zardoz]

Thanks for the replies. I believe my question is answered. However since some asked for pictures I took the sticks out and took some. The first two end with J70 ... that means 70 ns?

So 40ns is better than 120ns?

if that is a yes then for something like this:
http://amiga.resource.cx/exp/impact500mk2

Where it says "accepts 1 or 4 MB 120 ns SIMMs"

What happens if you put a stick of 40ns? it runs at 120ns?

From the answers I know this most probably does not make much of a difference but still curious

can you get more of a macro shot I cant read them.

[Zardoz]

Goldstar look to be  1MB 70ns
Mitsubishi look to be 120ns was not able to read part number.
MT= Micron, was not able to read part but looks like -7 on the end most like 70ns
The last one unreadable.

I can tell you some parts don’t like that 3 chip memory I remember some stuff not liking it, it just depends.

[Zardoz]

2 chip is the same just does not have parity. memory that had 2 chip like that or 8 chip tends to be non-parity memory.