trouble with a oldie

[Guest]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

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

 

[Guest]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

"Julian Hales" <julianhales@blueyonder.co.uk> wrote in message
news:NAMsd.86983$F7.71586@fe1.news.blueyonder.co.uk...

> 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 .

 

[Guest]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

>
> 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 .
>
>
>
>
>
>
>
>

 

[Guest]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

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
news:cp0d49029b2@enews3.newsguy.com...
> "Julian Hales" <julianhales@blueyonder.co.uk> wrote in message
> news:NAMsd.86983$F7.71586@fe1.news.blueyonder.co.uk...
>
> > 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 .
>
>
>
>
>
>
>
>

 

[Guest]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

"Julian Hales" <julianhales@blueyonder.co.uk> wrote in message
news:hL7td.98172$F7.90125@fe1.news.blueyonder.co.uk...
>
> 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.