PDA

View Full Version : Powerbook DDR2 RAM?



vicmeldrew
17th January 2007, 02:20 PM
I have a last revision Powerbook for which PC4200 DDR2 200-pin RAM is specified. Could I possibly use MacBook Pro PC5300 DDR2 200-pin RAM?

hMc
17th January 2007, 08:12 PM
Yeah you probably could, just keep in mind that ddr2 5300 (667) runs slower timings and latency. I would prefer two matching chips.

vicmeldrew
18th January 2007, 01:40 AM
I want to get 2 x 1GB sodimms. I thought if i get the higher speed ones I could use them later in a intel mac.

In this thread (http://forums.mactalk.com.au/showthread.php?t=5853) it is suggested that it will work with DDR1.


Originally posted by avolve@Sep 19 2005, 04:26 PM
is this the only RAM a mini can take?

a tech friend can get me a 1GB PC3200 DDRAM stick - will it work?

thanx
not a problem. PC3200 is backwards compatible with PC2100 and PC2700, just the same as PC2700 is backwards compatible with PC2100.

hMc
19th January 2007, 02:12 AM
Yes, generally speaking RAM is backward compatible.

Stay away from DDR400, 333, 266 it won't work in your machine (just incase)

As for the DDR2, 667 should work but the 533 will probably be more suited due to timings, latency etc.

Generally 533 run at 4,4,4,8 (better) and 667 run at 5,5,5,12.

Im not sure how the last revision powerbook is set up but if its expecting a latency of 4 and the ram you've bought can't run that low, you'll be crashing.

Hope I haven't confused you.

P.S - why not buy a 256 mb stick of 667 for peanuts and see how you go before you buy 2x1gbs.

vicmeldrew
19th January 2007, 05:31 PM
............... expecting a latency of 4 and the ram you've bought can't run that low, you'll be crashing.

Hope I haven't confused you.

P.S - why not buy a 256 mb stick of 667 for peanuts and see how you go before you buy 2x1gbs.............

hMc, thanks for that.

The Apple support discussions seem to support what you say about backward compatibility. However, I have spoken to ePowermac in Brisbane about this and they said that this particular powerbook was particularly fussy about RAM. Considering that they sell 1GB sticks for $165, which is cheaper than the Macbook RAM, I have decided to buy the DDR2 PC4200.

hMc
19th January 2007, 05:43 PM
Better safe than sorry - wise choice. Good luck with it.