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Keep in mind that the PowerMac only has room for one extra hard drive inside. Also, some models only had four DIMM slots anyway. That leaves only the PCI slots as the big difference over the iMac in terms of expandability.<div><br><div><div>On Feb 19, 2008, at 11:21 AM, Neil Laubenthal wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><p style="margin: 0.0px 0.0px 0.0px 0.0px"><font face="Helvetica" size="3" style="font: 12.0px Helvetica">The towers are more 'versatile' . . . but you have to ask yourself if the extra versatility provides anything useful to you. You can put extra drives in it . . .as well as more RAM.</font></p> </blockquote></div><br></div></body></html>