Dell Pentium

Is it possible to update a Dell XPS 400 Pentium D 945?
My specs are: Motherboard – Dell DXP051 current CPU – Pentium D@2.80GHz Video – Memory card GeForce 9600 GT – 3 GIG is possible to upgrade my PC and not overheat?
YES! Pentium D 2.8 GHz, has a maximum power draw of 95W. Pentium D 945 3.4 GHz also has an output power of 95W. Http: / / processorfinder.intel.com / Details.aspx? SSpec = SL9QQ
Dell Dimension 8200 Pentium 4 Desktop Computer