A7M266Mod worked!!

[LionHart]

Well.. I just modded my A7M266 installed 2 512ohm resistors and dip switch, hooked everything back up, and whadda ya know I now can changemultiplier settings. woohoo!
Could only overclock my athlon 1.33 to 1.45gig before, now I can clock to 1511. doing the mod was loads of fun. I figure not bad for my first micro soldering job. System is stable, now i just need a better chip.
Just letting you guys know that the mod really works.

Cheers!

[josog]

where can i find the link on how to do the mod?

[LionHart]

Try this link

http://www.forumoc.com/showthread.ph...7m266+resistor

[josog]

thanks LionHart. Does your board overheat or becomes unstable? Should i stick with 512 ohm?

[LionHart]

So far I haven't experienced any instability. I used the 511ohm resistors because they were availible on an old dead MB I had and they were within the recommended range. Also should let you know I used a 20Xmagnification scope a 15watt fine tip soldering Iron and real steady hands. You could order the 470 ohm resistors from digi-key or break out an ohm meter and search for two resistors on an old dead board within the range 330 Ohm to 560 ohm and desolder them like I did. I reccomend getting resistors as close to 500ohm as possible. Also check this link

http://www.overclockers.com.au/techstuff/a_a7m266_mod/

No heat or stability problems for me so far. So far I have ran many runs of 3dmark2001 and hotcpu tester lite and no problems. Now if I could only figure out how to post a picture of my mod.

[The Tinkerer]

Just a question.. As I read the manual, it seems to say that to be able to change the multiplier, the board has to be in jumper mode. But in jumper mode, the FSB is not adjustable in bios. Are you able to change the multiplier in jumperless mode with this mod, and can you still adjust FSB? Thanks

[JimS]

Now all you have to do is stick a 472K ohm resistor on position C106 on the motherboard, and you will have voltages up to 2.2 for the CPU.

I have done about 12 A7m mods. and it really is not that hard, especially after the first one.

I still cannot imagine why Asus did not make this a stock feature on the board. The resistors and switch cost less than $1.50.

Good job BTW Lion, doing the first one is quite a task.

You can change multipliers in jumper and jumper free mode.

[LionHart]

Thanks Jim. After doing the mod for the first time, I found the hardest part to be talking my self into doing it. Once I got everything together and started doing it I realized it was alot easier than I thought. I did feel a sense of pride when all was said and done though.

Yes you can adjust the FSB and multiplier in jumper free mode.
Asus probobly made a deal with AMD and that is ost likely why they left out the multi feature.


Cheers.

[Hubris]

Anybody know if there is a similar mod for the A7A266?

I can get 12x133, but the 'trick' switching back and forth between jumpered and jumperless mode doesn't seem to work with 12x multiplier....so I can't push back to 138 or 139fsb.....

[netdude]

"I can get 12x133, but the 'trick' switching back and forth between jumpered and jumperless mode doesn't seem to work with 12x multiplier....so I can't push back to 138 or 139fsb....."



What's the trick for the A7A266?? Thanks.

[Tigsman]

Ideal Ocing is lower multi, then raise FSB as high as u can go stable, then start bumping up mutli. this may take dropping the FSB a little, but this is proven the most effective way of OCing and getting as high a FSB as possible.

[Hubris]

Do a search on the post about the 1.05.01 beta bios being released.

Boot into jumper mode, stock settings. switch to jumperless, boot to bios...save. Boot to jumper mode, dipswitch 10 on, choose your speed with jumpers....boot into bios, save. switch to jumperless mode, boot to bios, it will remember your multiplier setting, but give you voltage and FSB control.

This process worked for me when I ran 11.5x multiplier, but isn't with 12x.

Tigsman is the expert.