Q: I bought the BG-71 motherboard and Pentium 4 CPU with a 533MHz system bus; however, the system can't boot up. Can you explain this problem?
A: The BG-71 adopts the Intel 845GL chipset. Based on chipset
specifications, the BG71 supports Pentium 4 CPUs with a 400MHz
system bus; 533MHz Pentium 4 CPUs are not supported.
Please do not install any 533 P4 CPUs onto the BG-71 motherboard.

For more details, please refer to Intel Web Site: http://www.intel.com/design/chipsets/845gl/index.htm