Hello, I wish to replace my current CPU with a faster P4 w/ Hyper-threading etc... The current processor is an Intel Celeron D 326 @ 2.53 Ghz with a 533 bus and 256K Cache. aka/ SL7TU LGA 775 x86 family 15 4 stepping. 84 watts and Vid 1.25-1.40 volts. I am aware that the power supply will also need to be replaced. I have a 400 & / or 480 watt supply picked out that matches my system motherboard, a Dell Optiplex GX280 Small Mini Tower. So... Whats the deal? What Processor if any can I upgrade to? Wish list is a 3.2 Ghz or 3.4 Ghz Processor. Lowest at 3.0 Ghz. as a 2.8 hardly seems worth the trouble. I am aware I could upgrade the whole tower for about 100 - 125 bucks including shipping. However; I suspect a processor on Ebay or elsewhere to be much cheaper. Any help appreciated. You can also write me as dabonboza@yahoo.com