Terry wrote:

I guess not buying at Walmart is good advice.

I'd be willing to bet that most computers you'd find at Circuit
City or Best Buy have the exact same issue (I am surprised at
some higher-end spec computers that use integrated video cards).
I think the better advice is having a clue what you're looking
at (and not posting computer related questions in off-topic
newsgroups -- if you'd posted it in a computer-related newsgroup
to begin with the first or second answer would likely have been
correct). They also would have told you that since computer
memory is never sold in 256mb increments anymore, having a
machine with 768mb is nearly impossible.

Bill