This is not a very good place to ask this sort of question!
comp.sys.sun.admin is devoted to the problems of administering computers
sold by Sun Microsystems. These computers typically run a Unix flavored
O/S called "Solaris".
Search for an "Acer" news group or a PC Hardware related news group.
A new computer is likely to cost you $500-$1000. A graphics card
offering very high performance might cost you another $500-$1000.
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Barry
http://members.iinet.net.au/~barry.og