Questions about iBook and iMac rev a-c ram

7 replies [Last post]
martakz's picture
Offline
Joined: Dec 20 2003
Posts: 634

Hi All,

Can anyone tell me if the standard SDRAM in the iMac and iBook has any of these features:

EDO
60ns or better speed
4K refresh
self-refresh capability

I look forward to your replies.

Cheers

T

__________________

Now using x86 machines. Bye bye iMac266 (Strawberry), G3 1400 and the G3 IIsi.

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.
Dr. Webster's picture
Offline
Joined: Dec 19 2003
Posts: 1687
The RAM that those machines u

The RAM that those machines use is plain PC-66/PC-100 SDRAM. The nitty-gritty of the specs (CAS, EEC, etc.) varies from DIMM to DIMM.

__________________

Applefritter Admin

martakz's picture
Offline
Joined: Dec 20 2003
Posts: 634
Is sdram made up of loats of

Is sdram made up of loats of Dram chips?

__________________

Now using x86 machines. Bye bye iMac266 (Strawberry), G3 1400 and the G3 IIsi.

doug-doug the mighty's picture
Joined: Apr 14 2004
Posts: 1355
interchangeable?

If you are getting at the question of interchangeability, I can say from experience with my 1st gen iBook and 1st gen iMac, everything works well when you swap RAM from machine to machine. I am sure someone out there has had a bad experience and thinks this is horrible to do, but the old 64Mb chip in my iMac worked for about a year in my iBook until I went up to a 256M chip in the iBook.

It worked for me.

--DDTM

__________________

--DDTM ('Fritter Critter' since Apr 26 2004 - 18:16)

'If it ain't broke, take it apart anyways. If you can't take it apart, break it so that you can fix it.'

martakz's picture
Offline
Joined: Dec 20 2003
Posts: 634
Actaully, I noticed the old r

Actaully, I noticed the old ram was made up of 8mb chips... I wanted to know if I could desolder one and stick it in my palm V. Compatible chips have to have the pointers I wrote at the top.

I was not sure if sdram is made from dram...

__________________

Now using x86 machines. Bye bye iMac266 (Strawberry), G3 1400 and the G3 IIsi.

Eudimorphodon's picture
Offline
Joined: Dec 21 2003
Posts: 1203
Chip Differences

martakz wrote:

Actaully, I noticed the old ram was made up of 8mb chips... I wanted to know if I could desolder one and stick it in my palm V. Compatible chips have to have the pointers I wrote at the top.

I was not sure if sdram is made from dram...

The chips which make up EDO and SDRAM dimms are different, in terms of how they interact with the clock and refresh signals.

Here's a technote:

http://download.micron.com/pdf/technotes/ZT07.pdf

Note that the "S" in "SDRAM" stands for "Synchronous", not "Static". (Like "SRAM".)

You might find a suitable chip on a DIMM ment for an older Mac/clone, although I'd check the voltage. (7500-9600 Mac DIMMs are 5v, "Tanzania" systems use 3.3v)

--Peace

martakz's picture
Offline
Joined: Dec 20 2003
Posts: 634
Yup it needs to be 3.3V. I'l

Yup it needs to be 3.3V. I'll check the Tanzania ram...though I have never heard of it!

Thanks for the help Smile

__________________

Now using x86 machines. Bye bye iMac266 (Strawberry), G3 1400 and the G3 IIsi.

Offline
Joined: Dec 19 2003
Posts: 566
Re: Yup it needs to be 3.3V. I'l

martakz wrote:

I'll check the Tanzania ram...though I have never heard of it!

"Tanzania" is the codename for the PowerMac/Performa 4400 (or the 7220 if you are in AU) ...

TOM