According to the specs, the Xeon 3060 is the fastest processor you can put on the Intel 3000 chipset in a PowerEdge SC440:
www.dell.com/.../PESC440_spec_ap.pdf
ark.intel.com/.../Intel-Xeon-Processor-3060-4M-Cache-2_40-GHz-1066-MHz-FSB
According to the specs, the Xeon 3060 is the fastest processor you can put on the Intel 3000 chipset in a PowerEdge SC440:
www.dell.com/.../PESC440_spec_ap.pdf
ark.intel.com/.../Intel-Xeon-Processor-3060-4M-Cache-2_40-GHz-1066-MHz-FSB