You need to contact Compaq* for them to provide you a full compatible list of processors for your Compaq* system.
Keep in mind that we do not recommend buying Intel products on online auctions like ebay.com, since there is not way for Intel to determine if the product was previously working or not, so we do not provide any kind of warranty for this type of products.
We recommend buying products from Authorized Intel(R) Distributors.
You can find a list of Authorized Intel(R) Distributors at:
what way do i go about contacting them?
In order to determine wich processors can be install on your system to have an upgrade, you need to contact the system manufacturer, in this case Compaq*
A E6800 Wolfdale dual core would be a good choice . New at NEWEGG $100.00. 3.3 Dual core . A real solid CPU. Or if you dare try Ebay.