Just how can you find out what your bus speed is?

what type of cpu do you have?

you can go into the bios and see how fast your bus speed is

Using a P4 1.7 GHz CPU on an Intel D845HV mobo.

then the bus for your cpu is 400mhz

OK Thanks. My 3DMark compare page though shows 100Mhz. Is this an error?

hmmm it could be 1 of 2 things,#1 it is an error in the program and it detects it as 100mhz or #2 the bus setting in your bios is at a lower setting

Hmm I dunno exactly if 3DMark or the BIOS reports an actual 400mhz bus (never used a P4), but doesn't the P4 execute 4 instructions per clock cycle, which is effectively originally a 100mhz bus?

very true Geforce that slipped my mind

The (Original) Pentium 4 Uses a 100Mhz Bus, Quad pumped (aka 4 accesses per cycle) i.e. giving an effective 400Mhz Bus.

The New 133Mhz Based Pentium 4 has an effective bus speed of 533Mhz (4x133)

AMD Athlons (T-Bird Core) and Durons use a DDR (Double Data Rate) 100Mhz Bus. i.e 200Mhz

New Athlons i.e. XP use a 133 DDR Bus i.e. 266Mhz

Future Athlons may use a 166Mhz DDR Bus i.e. 333Mhz

Ok, thanks for clarifiying.