Just take care of two things: 1.- The SATA controller on that machine is 1.5Gbps, so you cannot get the full speed from the hard disk. You'll feel the most the random access speed. Depending on what kind of work you do... 2.- Some new Apples (and other computers, specially some ultrabooks) cannot ta...

Oooh, yeah, old modules keep going up in price...

It's 25€ for 2GB and 50€ dor 4GB. Buying RAM is a good investment for a 6-8 years time...

Oooouch, paired EDO RAM, I remember that :D My brother is also having lots of problems with that model: fans, noise, random hangs... But I think the RAM upgrade is not that expensive, will be probably less than 50 or 60 dollars, and is very noticeable. But I have to say, probably my next laptop will...

Theoretically, Grand Central Dispatch, to improve multi-core, didn't come to OS X until 10.6, so apparently not. Also, I found 10.5 to be slower and clumsy on my PPC machines, with no noticeable improvements. But I only had G4s and no G5s, so I cannot say for sure.

I'm eager to see this Mac DC tools working on Intel OS X, I just gave my old PPC Mac Mini as a gift a week ago and I found they don't work on intel

I have a mid-2009 Mac Book Pro, and, man, the ram upgrade makes wonders. Is it an Unibody or the model before? Upgrading it should be 50 to 70$, and it should take 6 or 8GB max of ram, depending on the model. Check 'everymac' to make sure: http://www.everymac.com/systems/apple/macbook_pro/index-macb...