Question on old RAM

[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.

[sim085]

I attached better photos. The last digits of each are; 70, 12 (I suppose means 120), 7 (I suppose means 70) and 50.

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

I did a search on ebay; couldn't find any 50ns ... that said, it would be useless to buy 50ns for a GVP HD8+ given the limit of 120ns. Is this right?

[Oldsmobile_Mike]

I did a search on ebay; couldn't find any 50ns ... that said, it would be useless to buy 50ns for a GVP HD8+ given the limit of 120ns. Is this right?

You still have that backwards.  Lower numbers = faster, higher numbers = slower.  120ns is the slowest you can go, but it would never hurt to go faster.  I have 60ns in my GVP sidecar and it works great.  Think I paid about $7 each for a pair of newly manufactured (probably remanufactured - old chips on new boards) 4MB 60ns 30-pin SIMM's a few years ago, and they work great.  

[Oldsmobile_Mike]

For a GVP sidecar you want something like this:

http://www.ebay.com/itm/4x-4MB-Samsung-30pin-tin-non-parity-SIMM-memory-low-profile-tested-Apple-Amiga-/182081428205

Doesn't necessarily need to be this listing, but you get the idea.  30-pin, 60ns.  I like the ones with fewer chips (less parts to fail, less voltage/power requirements, blahblah, etc.).

[Oldsmobile_Mike]

Here's two that should work for the princely sum of $12 USD, with free shipping.  

http://www.ebay.com/itm/2x-4MB-Samsung-30pin-tin-parity-SIMM-memory-low-profile-tested-RAM-386-486-PC-/172150483700

[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.

[Oldsmobile_Mike]

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

Actually it looks like mine are only 2 chips, based on this picture I took a few years ago.  Obviously the label is covering them, but looks like only two would fit under there.  What can I say, haven't cracked the old gal open in a while.  

Also, we gotta get you guys some better cameras.  It never ceases to amuse me how often Amiga users (who I'd consider to be "pretty geeky") don't have a whole rack full of good camera gear (another "geeky" hobby), haha.  

[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.