I bet the board uses 4 jumpers or 4 dip switches to set the vcore.

If no jumpers (all off) are 1.8V and 1.9V is a single jumper (or dip switch on) to either the right or left side of the jumper block then moving that jumper one step twords the middle of the jumper block will give you 2.0V while adding a jumper instead of moving the first one will give you 2.1V.

The basic idea is that the jumpers are worth 0.1, 0.2, 0.4 and 0,8 volts over the lowest Vcore value with the 0.1V jumper at one side and the 0.8V jumper on the other, the manual should let you figure out which is which.

Do NOT test this if all known vcore values dosnt match what I have written.

1.8v is vid0,vid1,vid2 no jumper and vid3 12 jumpered, 1.9v is vid0,vid1,vid2 no jumper and vid3 23 jumpered.
2.5v is vid0 12, vid1 23, vid2 12 and vid3 no jumper.

lvader wrote:

1.8v is vid0,vid1,vid2 no jumper and vid3 12 jumpered, 1.9v is vid0,vid1,vid2 no jumper and vid3 23 jumpered.
2.5v is vid0 12, vid1 23, vid2 12 and vid3 no jumper.

Ok so your voltage jumperblock is 4x 3pin not 4x 2pin.

With even more known settings its perhaps possible to figure it out by making a full table but with luck someone else here on vogons has already mapped out the voltage settings on your board so my advice would be to wait for more input from other members.

Just looked at the manual and that looks way different than my SS7 boards - it is a 4x3pin header. It doesn't follow the "each jumper adds a value" logic. Are your K6+ chips rated for 2V or 1.6V?

It's 4 x 3 pin, so 4 jumpers (vid0, vid1, vid2, vid3) that can be set to off, 1 2 jumpered or 2 3 jumpered.

Thanks

Jeff

It's a 2v K6 III+ 450

If you know the jumper settings for 2.2V you can use that voltage as long your cooler is good but it's not 100% risk free. Or rather it's only risk free as long as your motherboards voltage regulation is good as 2.5-2.7V is the killing voltage range for a K6-3+ even with good cooling.

To complicate things my vid3 jumper header is missing from my rev board but I will deal with that if I need to.

I think I'm sorted, this site has a table for the Asus TXP4 mobo and the jumpers seem to match.

http://www.hwupgrade.it/articoli/skmadri/359/ … txp4_index.html

lvader wrote:

I think I'm sorted, this site has a table for the Asus TXP4 mobo and the jumpers seem to match.

http://www.hwupgrade.it/articoli/skmadri/359/ … txp4_index.html

Great 😀

Some K6-3+ were rated for 1.6V. They will all run fine at 2.0V, and 1.6V rated chips can be clocked higher when you do so, but if you plan on running them at stock speed and yours is rated for 1.6V, I'd go for 1.8V instead.