Read this http://www.overclockers.com/forums/archive/in … p/t-425361.html

I modded my Abit KT7-Raid for switchable multipliers, so I can select either 5-12.5 or over 15 depending on whether the switch is on or off. As mentioned in the
thread, some multipliers do not work, but it is flexible enough.

download/file.php?id=20476&mode=view

It seems my Gigabyte GA-7VRXP doesn't like 16x multipier witch is unfortunate. Wierdly enough it runs just fine with a 2600+ barton... CPU gets detected as "UnknownAMD Athlon(tm) XP 1900+" and runs at 11.5x133 with full 512kb of cache enabled. I set FSB to 166MHz (BIOS lets me go as high as 200MHZ) and dram clock to 266 (witch will tranlate into 333Mhz) and it succesfully posted as "UnknownAMD Athlon(tm) XP 2200+ and runs at 1915MHz with full 512kb of cache enabled. So far no issues spotted.

I also tested a Thorton CPU and I get "UnknownAMD Athlon(tm) 2400+ This one runs normally as well (15x133MHz).

Thanks for the documentation, I'll use it to mod my Abit KT7. What I didn't understand is did you just connect those wires to a switch or did you connect them to a resitor and a switch?

I used to run a socket wire mod on a KT266A board. Annoying but fairly easy. Just get individual strands of copper wire and run them in pin holes as described at this link.
http://www.ocinside.de/workshop_en/amd_pinmod/

What motherboard revision do you have? The bios can probably be patched to properly support Barton cpu's, but if you want higher multipliers
then you have to mod the board or cpu socket.

GA-7VRXP Rev 2.0. I wanted to mod the bios to at least properly identify thorton CPUs, but I can't seem to be able to find AMD CPU microcode for K7 CPUs anywhere...

As mentioned, wire mod works great. Good if you're not planning on switching CPU's alot.

I can't mod this Gigabyte Bios as it's an AMI Bios.

I used "Bios Patcher" to update cpu microcodes as well as some other things, then Modbin for my Abit's Award bios. I can't find
anything that works with the 7VRXP F12 bios.

You will need a more experienced Bios modder to mod Your Gigabyte Motherboards bios.

A switch (or short) across the pins I have shown will allow You to access higher multi's, but see what happens with it on above 12.5 or Auto.
With an unlocked AMD Thoroughbred 2400+ my motherboard defaulted to a 20x multi on the above 12.5 setting. The Barton Mobile 2400+ I
have installed defaulted to the lower multi's 5-12.5 which Is why I had to add the switch to access 15x and up to 24x. My Abit board doesn't
support FSB of over 100mhz, which is why it needs 24x for 2400mhz

For AMI BIOSes you should try several versions of MMTOOL

Could you provide a link for this Bios Patcher? I have a Acorp 7kt266a Kt266 DDR/SDR combo board with universal AGP and I'd like to get it running with newer CPUs. So far it only POSTs with durons and the original socket A athlon. It has an award bios.

Thanks for trying to mod the bios on my gigabyte - I apreciate the effort. I guess the fact that it reads my 2600+ as a 2000+ is a bios bug since it works fine with my 2400+. The 2600+ runs at 2133mhz (AXDA2600DKV3C) and would have been a nice upgrade but until I can get it sorted I'll have to use the 2GHz 2400+

This one opens my PCChips 730S BIOS fine (an AMI BIOS). A newer version I found on the internet didn't, so keep that in mind: you might need a different version.

http://www.overclock.net/t/1431723/mod-lga775 … 0#post_21540315

I patched the latest version for You. I had to remove "av" from the filename as it was 10 digits and bios patcher is a dos program.
Test it in Modbin if You want.