I purchased a Powermac G5 in early 2006 and a 2.16 Ghz Intel Core Duo laptop 17inch later that year, Ive never installed any additional ram on these computers, I do graphics and the systems are started to get a bit sluggish as I like to have a lot of programs open at once, what ram would I need for these macs and how much would you recommend I get, Iam in the UK so if anyone knows any good places to get ram, i dont want to go to apple as the price of there ram is ridiculous.