my computer has always ran slow since i bought it from a pawn shop- it has 1ghz, 768mb ram and leopard- is that why? because of leopard and it needs more? if so then where can i get a copy of tiger for cheap cheap /free or how can i put ubuntu on it?

What Leopard are you saying? Want A Weekly Update on Latest System Security Problem http://www.systemsecurityinstitute.org

PowerPC or Intel? If it PowerPC, you wasted your money. Macs are all Intel now and the newest version of the OS, Mac OS X Snow Leopard. You wont find Leopard for free LEGALLY and online it'll be cheap and if you have an Intel Mac you can get the newest version for $30. Ubuntu is for vanilla workstations, I'd never have it as my main OS. EVER.

yes i have the ppc IMAC G4 because it looks cool. it has 10.5 regular leopard but i want tiger on it, or something that will make it run fast where can i get that and how?

lowendmac.com will have deals for tiger and ram upgrades... if you want real speed on there you have to run OS 9. PPCs esp. G4 would choke on OS X from my experience. maybe i did to much...lol

it's original software says it was 10.2, i slapped 10.4 on there and already its running WAYY faster except one thing- streaming videos. They are extremely slow still. does mac have drivers? does my video driver need updated or somthing? because thats what pcs problem would pry be, idk im fairly new to macs and just trying to find out .