More than likely, yes, it'll perform better. If the PC can handle it, then it may be worth it. But then again if it can handle it then, as already said, it might be more worth it to try and overclock the 1.8GHz. If my math is correct then 1.8GHz @ 400MHz FSB would be 2.4GHz @ 533MHz FSB.
Can you list your system information?
<pre><font color=orange><i>Jesters do oft prove prophets.</i> -Regan in
King Lear (Act V, Scene iii) by William Shakespear</font color=orange></pre><p>@ 189K -> 200,000 miles or bust!