Pentium 4 - b0 or c1 core?

[Flakk]

How can I tell if the Pentium 4 cpu I recently purchased (3 weeks ago) was one based on the older b0 core or if I happened to get a newer c1 version? What is the difference between them performance-wise?

 

[squirrel dog]

The higher speed chips run on a 533 mhz buss(2.4 and on I think)

 

[oldfart]

Look at the default vcore. B0 is 1.5, C1 is 1.525

 

[THUGSROOK]

actually there are some C1s that only run 1.5v ~ but they are very rare.

 

[Flakk]

how do i look at the default vcore? i dont have the chip actually installed yet.. can i tell by looking at the physical chip?

 

[oldfart]

Should be listed on the box.

 

[Flakk]

well i looked for something about vcore and didnt see it on the box. but my chip is a 533 bus speed version.. does that tell me it's c1?