What computer do I need for smooth 6tabling with pokertracker running?

[Sura]

I have got a Sony Laptop (Vaio) with Pentium(r) 4 CPU 2.80GHz with 448 MB RAM (not upgradable) and my Prima multitabling often gets stuck during the time pokertracker is importing data. It also sometimes takes a long time for loading new tables (seat is already taken when the table finally pops up) which might or not be related to the prima software or internet connections. Does it make sense to buy a new laptop or will I have the same problems?