• Q1 2000:Pentium III 800MHz w/100 or 133MHz FSB and i820 chipset
  850/866MHz introduction w/ 100/133MHz FSB and i820 chipset
  1GHz low-volume introduction w/133MHz FSB and i820 chipset
  
• Q2 2000:Pentium III 850/866MHz w/ 100/133MHz FSB and i820/E chipset
  933MHz introduction w/133MHz FSB and i820/E chipset
  i820E chipset introduction in June
  
• Q3 2000:Pentium III 933MHz w/133MHz FSB and i820/E chipset
  1GHz volume introduction w/133MHz FSB and i820/E chipset
  
• Q4 2000:Pentium III 1GHz w/133MHz FSB
  1.3/1.4GHz Willamette introduction and Tehama chipset
  Tehama chipset introduction
  
• Q1 2001:1.3GHz/1.4GHz and Tehama chipset
  1.5 or more GHz Willamette introduction and Tehama chipset

The Performance 1/Professional systems are akin to what you will see in our Hardware Buyer's Guide as the High-End Gaming PC. These machines are the best you can find in a single CPU Intel solution, be it for gaming or otherwise.

Notice that no Pentium IIIs are planned to work with a 100MHz FSB above 850MHz. With only four pins to control the clock multiplier, the Pentium III architecture can only send the motherboard its multiplier setting up to 8.5x. So 1133MHz (133x8.5) appears to be the maximum speed a Pentium III can reach on current i820 motherboards without overclocking.