WHAT A DEAL! This Intel Pentium III 866MHz CPU with 256KB cache, running at 133MHz, voltage 1.7Vis compatible with Intel Socket 370 motherboards. It's just what you need for your Retro build! Perfect for vintage computing enthusiasts looking to upgrade a Retro system with a reliable and fast processor. Clean. CPU Tested and Guaranteed to Work Great! *FREE SHIPPING to the the continental United States; elsewhere, please contact me for details.* Your CPU will be securely packed to safely ship in non-OEM packaging no later than the second business day after payment is received. As rates and circumstances are subject to change, the shipping carrier used may not always be the one listed, but will typically be either UPS Ground, FedEx Ground or USPS Ground Advantage. In any event, your shipment will be expedited, and you will receive tracking info. For multiple items, shipping will be combined. Thanks for viewing this Intel Pentium III 866MHz CPU, please Link at top of page.