With the launch of the new 800MHz FSB Pentium 4 CPU's Intel also announced two new chipsets, the Canterwood for high performance systems, and the Springdale chipset which is a little bit cheaper. The only big difference between both is that the Canterwood chipset supports ECC (Error Correcting) Memory and officialy supports Intels PAT (Performance Acceleration Technology). But more about that later because some motherboard makers have enabled the PAT on their Springdale motherboards. Probally the Canterwoods have passed some sort of quality test, I guess that is the real difference between these two chipsets. The motherboard we have on our test bench for this review is a Springdale one from AOpen, the AOpen AX4SG Max.