Getting the most out of a good ol' motherboard.

[shawnmos]

I have an old motherboard with a max multiplier of 4 and and max bus of 75. Someone told me that setting the newer AMD chips to a 2x multiplier will give you 6x(like setting 1.5 and getting 3.5). So I stuck a K6-3+ 450MHz in my old motherboard and set the multiplier to 2(really 6) and the bus to 75. And voilà it worked. Sandra's benchmark barely showed a proformance drop at the 75MHz bus. This is great!! So my question is are there any other tricks to getting a motherboard to run at a higher multiplier or bus speed then intended? Also what is the speed of the AMD CPUs that this will work? My friend said the k6-2 266MHz and up but he wasn't sure. Is this correct? Thanks!

Shawn

 

[shawnmos]

bump

 

[shawnmos]

Does anyone know?

 

[shawnmos]

topetón

 

[BurnItDwn]

A lot of older board had a secret 83mhz FSB setting ... i remember i had a board that was supposed to max out at p200 speed ... but i was able to run a k6 at 83 x 3 for a whopping speed of 250mhz ... it was a big jump from 233. it was quite unstalbe though ... so usually i ran it at default speed and voltage or i ran it at 225 (75x3)

see how the jumper settings are for the mobo

my old mobo had 3 jumpers ... each with 3 pins ..

Jumper A B C
50 2-3 2-3 2-3
55 1-2 2-3 2-3
60 2-3 2-3 1-2
66 2-3 1-2 2-3
75 1-2 2-3 1-2

unused ones would be
2-3 1-2 1-2
1-2 1-2 1-2
1-2 1-2 2-3


I tried all the different combos ... until i found one that posted with a 83mhz FSB ...

while this may not be the most efficient, safe, or stable way to do things.... It was kinda cool to figure out.

I think there may be a hidden 83mhz FSB in your board as well ...often the chipset cant handle it ... but sometimes they can ... if you just give it a shot.



I know this is kinda off subject ... but it may be of some help in some way or another