I have an "ancient" PowerMac Quad G5, and I am wondering if I can do anything to make it faster. It isn't slow for the things I do, and it is faster encoding movies in handbrake than my MacBook. Why is this, more processors? I have 8GB RAM in it, and I have 4 more 2GB sticks of RAM (on hand) that I can put in it. Would double the RAM make a noticeable difference? Also, are there better graphics cards that are compatible with it? I have the nVidia Quadro FX4500 in it. Are there any other upgrades I can put in this machine? Finally, I have heard a rumor that SL may be coded for PPC, is this true?