The Sun Fire E25k is Sun’s flagship server that offers the ultimate performance in computing power and scalability. The E25k can house up to 72 1.35GHz UltraSPARC IV processors and up to 576GB of memory. With this much power you can be sure that all of your mission critical processing requirements will be met. To protect the value of past purchases the Sun E25k is designed to allow the usage of both UltraSPARC III and UltraSPARC IV chipsets in the same machine, running simultaneously.