The Pentium Pro was replaced with the Pentium II Xeon with the 250 nm Deschutes core in 1998 and the Pentium III Xeon with 250 nm Tanner core in 1999 (180 nm cascades core in 2000), which marked the debut of the Xeon brand. The first series was clocked at 400 to 450 MHz, while the Pentium III reached 1 GHz. With the arrival of the Netburst architecture in late 2000, Intel dropped the Pentium brand from Xeon and positioned its server/workstation processors as more apparent standalone products. The first Netburst Xeon was based on the 180 nm Foster core and was available with 1.4 to 2.0 GHz clock speed. The Netburst architecture continued until 2006, when Intel had expanded Xeon to a full line of UP and MP processors with 90 nm Cranford, Potomac, Paxville and 65 nm Tulsa cores. Similar to its desktop counterparts, Netburst processors ran into a “power wall”, forcing Intel to revise its processor architecture.