[HTC EVO 3D] neonfreak20:
Sup Guys, Im not sure if this is useful or not. But this is what i usually do when i UV. (Make sure your Kernel Supports UV/OV/OC)

==========Disclaimer: This is a General Test for how to find your Minimum Voltage for your CPU Freqs. I am not responsible for your phone Blowing up, Calling your X-GF in the Middle of the Night, Stealing your Car. etc...etc..==========

This is what i Use to test Voltages. This is Similiar to Overclocking Computers only its in Reverse...I'm sure there are other ways to do it online (Perhaps even easier ways, But this is how i do it and if it aint broke don't fix it) :)

1) First things First. Make sure you Nandroid!!!! Never be to cautious when messing with Voltages.

1) Buy or Download StabilityTest ======>Here

2) Buy or Download SystemTuner Free/Pro ======> Here

3) Open SystemTuner and Select "Tweaks" Then "Cpu". Then Set your Governor and Min/Max Frequencies...Etc..Etc.

4) Then Click on the "Voltage" Tab. Make Sure you Click on the Backup Tab in the Lower Left. Just incase you set it too low or high and make it unstable.

5) Open StabilityTest, Run the "Scaling Stability Test" (Obviously it will ask for Root) *If your not rooted, You shouldn't be reading this* ;) Make sure you let it run for a little bit. Personally, I like to run it for at least 10 mins. This will test your Stock Voltages. (You can prob skip this step, But i just run it to establish a baseline.)

6) Refer to Stock VDD Chart Here to use as a Starting point. (Credit To Chad Goodman.) This is based off the QualComm Spec and Might be Different to yours Depending on Kernel. Then Slowly Decrease Voltages by -12.5 (One at a Time!!!) You do not want to rush this. This will be Trial and Error and if you set it to low it will Freeze/Reboot. Then you have to start over. :(

Once you have lowered your Voltages Run the Scaling Test and see if is stable. If it passes then proceed to go lower until it fails or freezes. Then Raise the Voltage back up a notch until it Passes again.

*Note* - If you are Uncomfortable with lowering Voltages, You can usually get away with lowering them -25mv/-50mv on each frequency without freezing them up. This Method described above is Generally used for finding the Absolute Lowest Voltage Possible :D

You will have to switch back and forth between SystemTuner and StabilityTest in order to test for Stability.

*****There is another way to test each Voltage Independently by setting your Min/Max CPU Speed to the same as any of the Frequencies above in the VDD Table, And then you can lower the Voltage on just that one Frequency in SystemTuner. *Make sure you set the Min and Max to the same Freq. (ex: 1188/1188. Otherwise it will scale down/up and you wont be able to test that voltage correctly..)

Then run "Classic Stability Test". This will load the CPU to 100% and test the New UV Voltage. If it passes your in Business, If not, Raise the Voltage until it does and repeat for the Rest of the CPU Frequencies..*****

When you are finished and are satisfied with the results. Write down all of your new Minimum Voltages. Its a pain to remember them all when you have to start over (Believe me I know!!!) :rolleyes:

If anyone has any questions or problems with this, Please PM me and i can try to walk you thru it. If this helped you in anyway please hit the Thanks button. It took me awhile to write this out :p