128MB SIMM's

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4th May 2010, 23:17
ddni

Quote:

Originally Posted by blankstare

Quote:

Originally Posted by ddni

The picture looks like the RAM IC markings end in a 5.
This would imply the RAM chips can support 50ns.
Are the actual RAM SIMMs that you have all marked in the same way.
If so what is stopping them from running at 50ns?

Thanks.

As far as I am aware, the SIMM's are all rated at 60ns. I cannot say either way that 50ns speeds are supported.

OK thanks. Can you post better pictures and / or confirm the exact part number of the simm and the RAM chips please.
4th May 2010, 23:26
StrontiumDog

Quote:

Originally Posted by ddni

Quote:

Originally Posted by blankstare

Quote:

Originally Posted by ddni

The picture looks like the RAM IC markings end in a 5.
This would imply the RAM chips can support 50ns.
Are the actual RAM SIMMs that you have all marked in the same way.
If so what is stopping them from running at 50ns?

Thanks.

As far as I am aware, the SIMM's are all rated at 60ns. I cannot say either way that 50ns speeds are supported.

OK thanks. Can you post better pictures and / or confirm the exact part number of the simm and the RAM chips please.

I'll see what I can do for you :)

---------- Post added at 23:26 ---------- Previous post was at 23:25 ----------

Quote:

Originally Posted by amigaman2000

@arnljot

Blankstare specified that you need a rubber band to fit the SIMM properly on a Blizzard 1230 IV and doesn´t said the same about PPC cards so I supposed that the rubber band wasn´t necesary for the PPC.

But is obviously that this is my fault so no problem.

Regards

If the PPC is in a A1200 then I'm suggesting to take a dremel or simillar tool and re-shape the bracket if one of the SIMM's is tight up against it. There's quite a bit of leway here for making a small but very handy mod.

I have offered a refund if Amigaman2000 wishes to take me up on it. This same offer goes without question for anyone else who experiences simillar problems.

I have updated post 3 of this thread to reflect the use of a rubber band or zip tie and possible modification(s) if used in a standard A1200 on PPC boards.
4th May 2010, 23:27
rkauer

Thing is: even when a chip is labelled as 50ns, it may fail running at such speed, hence the manufacturer mark the SIMM as 60ns.
5th May 2010, 08:05
ddni

Quote:

Originally Posted by rkauer

Thing is: even when a chip is labelled as 50ns, it may fail running at such speed, hence the manufacturer mark the SIMM as 60ns.

HI rkauer, have been thinking the same thing. That is why higher res pictures and simm part number would help me decide.
5th May 2010, 18:07
Kin Hell

Quote:

Originally Posted by rkauer

Thing is: even when a chip is labelled as 50ns, it may fail running at such speed, hence the manufacturer mark the SIMM as 60ns.

Actually, no. Manufacturers are not permittted to label chips at 50ns if they won't run @ 50ns, period.

What might make a 50ns chip not to run @ the stated 50ns is the hardware it is installed on.

On the other hand, chips labelled 60ns may actually run @ 50ns, but again, this depends on the hardware it is installed on & the quality of the 60ns chip.

Kin

*edit*

Sometimetimes, the industry deliberately label 50ns chips as 60ns purely to meet demand. This is also very relevant to all of todays current memory chips, CPU's & GPU's. - If you're lucky enough of course. ;)
5th May 2010, 18:10
ddni

Quote:

Originally Posted by Kin Hell

Quote:

Originally Posted by rkauer

Thing is: even when a chip is labelled as 50ns, it may fail running at such speed, hence the manufacturer mark the SIMM as 60ns.

Actually, no. Manufacturers are not permittted to label chips at 50ns if they won't run @ 50ns.

What might cause a 50ns chip not to run @ the stated 50ns is the hardware it is installed on.

On the other hand, chips labelled 60ns may actually run @ 50ns, but again, this depends on the hardware it is installed on. ;)

Kin

Interesting...

Still waiting on some better pics and SIMM part number...
@ Blankstare, any chance please?
5th May 2010, 18:54
StrontiumDog

Quote:

Originally Posted by ddni

Still waiting on some better pics and SIMM part number...
@ Blankstare, any chance please?

Just waiting on a fresh delivery of SIMM's
5th May 2010, 22:27
amigaman2000

Quote:

If the PPC is in a A1200 then I'm suggesting to take a dremel or simillar tool and re-shape the bracket if one of the SIMM's is tight up against it. There's quite a bit of leway here for making a small but very handy mod.

I have tested the SIMM modules again and I can confirm that the SIMM doesn´t fit on my Blizzard PPC flat SIMM socket, I have tested on two different Blizzards PPC cards and it doesn´t work in none of the two. It fits and works perfectly on the angle SIMM socket but I must remove the floppy disk drive bracket to fit it.

So now I have one SIMM on my Blizzard PPC card and the other one in the SCSI module of my Blizzard 1260. :D

Regards

---------- Post added at 21:27 ---------- Previous post was at 21:25 ----------

@ddni

Quote:

Are the actual RAM SIMMs that you have all marked in the same way.

No I received two of then and they are marked with 6 not 5.

Regards
5th May 2010, 23:45
ddni

Quote:

Originally Posted by blankstare

Quote:

Originally Posted by ddni

Still waiting on some better pics and SIMM part number...
@ Blankstare, any chance please?

Just waiting on a fresh delivery of SIMM's

Ok thanks for that.

@amigaman2000, the RAM Ics in the original images do look to be marked with a 5. Does anyone else see that?
7th May 2010, 23:33
StrontiumDog

All trading on here by me is currently suspended due to the current situation on this website. Hoefully it is only a temporary situation.

Mods, please cose this thread until further noticce.

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