[StiZeven]

Does anyone know if I can put a 1GB PC2100 RAM stick into one of the slots of the 15" AlBook? And, since the 15" AlBook comes with two 256MB sticks (cheap bastards), can the 1GB PC2100 stick co-exist with the 256MB PC2700 stick? If so, am I to assume that the PC2700 stick will need to run at the PC2100 speed of 266MHz (or is that just on the PC side?)

Personally I am not too concerned with the performance difference (if any) from 333MHz to 266MHz as I've never noticed a difference in my PCs.

Any info would be appreciated!

[mrfoxxman]

If you had a machine that used PC 2100 [266] DDR ram (like the 12" powerbook), then you can mix and match between the faster PC 2700 ram and the PC 2100 ram.

The 15" PowerBook on the other hand uses ONLY PC 2700 [DDR 333] Ram, so you can only use that type of ram

[mrfoxxman]

Here is an article that talks about the effects of mixing PC2700 ram and PC2100 ram [it is in reference to the Power Mac's but the principal is the same]

http://docs.info.apple.com/article.html?artnum=75382

[StiZeven]

Thanks very much for this info! This is good to know and I am glad I asked before using it. That article pretty much summed this up as well.

I will get a pair of Samsung 512MB sticks for now, and invest in a PC2700 1GB stick when the price is in the $400 area.

[ibook_steve]

Also, your machine won't boot if you have any PC2100 memory installed. You'll get 1 beep and the machine won't boot.

Steve