Some senseless babbling from Bat Lang to Rich Wonneberger
on 10-10-99  00:03 about CPU change...

 -=> Quoting Rich Wonneberger to Ruth Argust, [08 Oct 99  23:25:00] <=-
 
 RW> I was thinking about the 60 and 66 mhz bus difference in the older
 RW> processors.  I was going to get a processor with the same bus speed &
 RW> under clock it. I just dont know what speed the 200 uses for the bus.

 BL> As a 'general rule' if you divide the CPU speed (200) by an integer
 BL> like 2 or 3, and it results in one of your available bus speeds, then
 BL> that's prolly the bus speed you will use. So 200/3 = 66.67, or ~66. So
 BL> you would use the 66 bus speed with a multiplier of 3.0 for your 200
 BL> mhz cpu. It's a function of 'pairing' the available bus speeds with the
 BL> available multipliers on the mother board to achieve the CPU rate.
 BL> Usually it's best to start with the highest bus speed available, then
 BL> look at the multipliers available. If the cpu has it's own built-in
 BL> multiplier, then there is less flexibility. This is all from my
 BL> limited experience. Someone that has more of that could doubtless give
 BL> you a more refined explanation.  {^;  Good Modeming!  /\oo/\

All the Pentium-class chips I've seen don't have a fixed multiplier, but
rely on the motherboard setting.

The only problem with going with the highest bus speed is that it can cause
some peripherals to stop working.

For example, choosing a bus speed of 75MHz instead of 66MHz would put the
PCI bus at 37.5MHz, instead of the designed speed of 33MHz.  Most devices
work fine on a faster bus, but some don't (such as 3COM PCI network
adapters).

Despite this, overclocking the bus is both safer and more effective than
using a normal bus speed, and a higher multiplier to overclock the CPU.
The latter gives you more raw CPU power, but the former reduces the
bottleneck of the system bus, which almost always makes for better overall
performance - especially with multitasking, where pushing data over the bus
becomes very important.

Mike Ruskai
thannymeister@yahoo.com


... Dog for sale: Eats anything, fond of children.

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