My mum's PC has been upgraded recently and I now have her old Dell. Is it worth the electricity setting this up for a SETI 24/7 machine? It's so slow I have no intention to use it for anything else; Intel Celeron 420 @ 1.6ghz 512MB DDR2 RAM 667mhz Onboard 128mb graphics 150gb Sata HDD Windows XP Home Given that the machine is so unresponsive (30secs plus to open a window) I plan to give it a fresh XP install with windows updates, throw on some free AV software and let BOINC do it's thing. Am I wasting my time? Are there any cheap upgrades worth doing for better SETI performance? A cheap Nvidia GPU perhaps or a bit of extra RAM?