ComputerBooter

The original picture I posted for the 1.6 xbox does get 1.45 for the vcore but it also grounds some 5v and is not recommended. The newer method uses 1.5k resistors in a few spots to get around 1.45vcore on the 1.6 xbox's. The instructions found for the 1.0-1.4 xboxs actually give a bit higher vcore, I believe 1.5 which isn't bad but the recommended is 1.45 for tualatin. I plan on documenting all voltages in case someone wants to test at a lower or higher vcore for stability.

So we are still working on the CORRECT Vcore settings, apparently they are wrong for all models. This thread might need to be deleted so there isn't bad info out. Cant seem to edit my original post anymore?

I was actually wrong, and was measuring Vcore at the wrong location, the original settings I provided are actually 1.55v which wont kill the tualatin, but is .1v higher than it should be running. Although some CPU's will run better at a lower vcore, some might run better at a higher vcore, either way it is better to be lower than higher. Here is the CORRECT setting for cpu Vcore for 1.45v. All that is necessary is to move the original R2E7 0ohm resister and place it on the R2E5 position to attain 1.45v vcore which should be measured at the two resistors south of that (R2E10 + R2E8)

Remove modchip and see if it boots stock, if it does you probably have a bad joint somewhere. Post pics of the LPC rebuild and the joints to the Xenium Header.

Yessir, once I can get sufficient cooling it’s game on!

Try replacing the cap near the encoder, report back

Thanks to @zzattack and his help I have been able to more successfully complete CPU Upgrades (2/2) with his technique so far! Will be getting some units up for sale as soon as I can figure out the proper cooling technique! The VCORE Voltage Modifications necessary for 1.45volts on a v1.6 xbox is as follows (using 0ohm resistors)