Unlike overclocking, undervolting will not void your warranty or damage your hardware AFAIK.
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*Advantages of Undervolting
- Cooler CPU (5 to 20c cooler)
- More battery life (15-30mins more)
- Less Fan noise
- Longer overall notebook life
By reducing the voltage fed to the CPU, it will run much cooler. It will also draw less power from the battery which can give you an extra 10-30+mins battery life depending on the degree of the undervolt. Also a cooler CPU means the fans will run less which again points to more battery life. It is common sense that a cooler running notebook will last longer than a warmer/hotter counterpart. Heat is the killer of most electronic parts.
*Disadvantages/Risks
- BSOD (Blue Screen of Death)
You will get a BSOD at the very most if you drop the voltages too low. This is why we do a stability test to make sure we get no BSOD's. If the voltages are setup properly you shouldnʼt get any at all. A BSOD seems to be the only risk for undervolting in my experience. So make sure everything is saved before you do anything. I dont wanna be responsible for any loss or hoo-haa's.