trouble with a oldie

Hi all

I have a 333mhz old AMD

Found a 550 chip, i googled the web and found a way to alter the 66mhz to
83mhz which is the max it seems this takes.

Anyway after doing that reboot says 416mhz

the mobo specs on bootup are 51-0831-001437-00101111 which used in google.
M571

found a layout of the board and it seems to match,

im running dimms rather than simms.

i really need to get it to 500mhz as i want to lan game it for SOF2 which i
know is pushing it esp as no agp.

thanks

"Julian Hales" wrote in message
k...

Hi all

I have a 333mhz old AMD
Found a 550 chip, i googled the web and found a way to alter the 66mhz to
83mhz which is the max it seems this takes.
Anyway after doing that reboot says 416mhz
the mobo specs on bootup are 51-0831-001437-00101111 which used in google.
M571
found a layout of the board and it seems to match,
im running dimms rather than simms.
i really need to get it to 500mhz as i want to lan game it for SOF2 which
i
know is pushing it esp as no agp.

I take it this is a K5-2/550 ??

Set the multiplier jumper for 2X instead of 5 . It sounds strange but AMD
did us a favor by making the later K6 CPUs read 2X as 6X internally.

6 times 83 equals 498; that's all you are gonna get out of that combo.

The only ways to "get faster" :

1) find a later mobo that does 100mhz FSB (which usually gets you an AGP
slot as well).

2) put in a K6-2 or III "plus" laptop chip and use a software mulitplier
adjust application. Not a good idea unless you want to mess with specialised
BIOS and can set Vcc correctly .

I take it this is a K5-2/550 ??

yes


Set the multiplier jumper for 2X instead of 5 . It sounds strange but AMD
did us a favor by making the later K6 CPUs read 2X as 6X internally.

6 times 83 equals 498; that's all you are gonna get out of that combo.

The only ways to "get faster" :

1) find a later mobo that does 100mhz FSB (which usually gets you an AGP
slot as well).

thanks, i looked for a jumper but couldnt find one so guess its sticking at
that



2) put in a K6-2 or III "plus" laptop chip and use a software mulitplier
adjust application. Not a good idea unless you want to mess with
specialised
BIOS and can set Vcc correctly .

Spot on!!

Can i ask how you know that and why it works, be useful to know.

bios says 500mhz.

thanks


"R. Asby Dragon" ube_never @ YAHOO . COM wrote in message
...
"Julian Hales" wrote in message
k...

Hi all

I have a 333mhz old AMD
Found a 550 chip, i googled the web and found a way to alter the 66mhz
to
83mhz which is the max it seems this takes.
Anyway after doing that reboot says 416mhz
the mobo specs on bootup are 51-0831-001437-00101111 which used in
google.
M571
found a layout of the board and it seems to match,
im running dimms rather than simms.
i really need to get it to 500mhz as i want to lan game it for SOF2
which
i
know is pushing it esp as no agp.

I take it this is a K5-2/550 ??

Set the multiplier jumper for 2X instead of 5 . It sounds strange but AMD
did us a favor by making the later K6 CPUs read 2X as 6X internally.

6 times 83 equals 498; that's all you are gonna get out of that combo.

The only ways to "get faster" :

1) find a later mobo that does 100mhz FSB (which usually gets you an AGP
slot as well).

2) put in a K6-2 or III "plus" laptop chip and use a software mulitplier
adjust application. Not a good idea unless you want to mess with
specialised
BIOS and can set Vcc correctly .

"Julian Hales" wrote in message
k...

Spot on!!

Can i ask how you know that and why it works, be useful to know.

bios says 500mhz.


The K6 2X(mobo)=6X(CPU) thing has been fairly common knowledge for years; I
*think* I found it in a mobo manual; but I may have picked it up a newsgroup
or message board somewhere on the web.

Just for grins; plug "K6 multiplier" into Google .. it's definitely around
!

As for the "Why"; you'd have to have been there during the evolution of
"Socket 7" and watched the battles among Intel/AMD/Cyrix on the CPU side
along with the "chipset wars". (and also the tech moves like the move from
FP/EDO RAM to SDRAM)

The only "real standard" among all the players was the actual CPU socket; so
the standards for that locked the layout of CPU pins. (the muliplier jumpers
are diectly related to a series of CPU pins) .

By the time the clock speeds reached 233 mhz; the 2X mobo jumper was unused
in new production machines. The only way to get in that range with a 2X
muliplier was with a frontside buss of 125mhz. FSB was tied to the PCI /
memory buss ; jumping the 33mhz PCI buss up to 70mhz *just doesn't work
well*! (and SDRAM to work at that speed was "unobtanium" at that time.
Forget PF/EDO RAM....)

By that time; Intel had pretty much abandoned Socket 7 for Slot 1. I
suspect AMD went to the 2=6 mulitplier to save the motherboard makers from
having to create "special" motherboards for the newer K6 CPUs as the clock
speeds ramped up.