F5F Stay Refreshed Hardware Desktop No, CPU undervolting reduces voltage usage, which lowers the load on VRMs.

No, CPU undervolting reduces voltage usage, which lowers the load on VRMs.

No, CPU undervolting reduces voltage usage, which lowers the load on VRMs.

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Dj_Kitty56
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07-27-2016, 12:56 AM
#1
I'm testing how undervolting affects my HP 15 laptop. At -70mV in the core cache and -170mV in the CPU cores, things started to fail. I stopped adjusting voltage now to see if it would make things worse. Based on the relationship P=U.I, if current drops while voltage goes down, the power demand should decrease, which might ease stress on the VRMs. So undervolting likely reduces extra strain rather than increasing it.
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Dj_Kitty56
07-27-2016, 12:56 AM #1

I'm testing how undervolting affects my HP 15 laptop. At -70mV in the core cache and -170mV in the CPU cores, things started to fail. I stopped adjusting voltage now to see if it would make things worse. Based on the relationship P=U.I, if current drops while voltage goes down, the power demand should decrease, which might ease stress on the VRMs. So undervolting likely reduces extra strain rather than increasing it.

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LuckyKevin
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07-27-2016, 08:45 AM
#2
Energy output changes when a CPU runs at lower voltage. Usually, efficiency drops significantly without adding stress.
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LuckyKevin
07-27-2016, 08:45 AM #2

Energy output changes when a CPU runs at lower voltage. Usually, efficiency drops significantly without adding stress.

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SophiaPav
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08-01-2016, 11:26 AM
#3
Under maximum load, the CPU stays at a fixed power draw of 15W TDP, providing better performance per watt (rising from 2.3 GHz to 2.6 GHz across all cores). This is what worries me. Identical power consumption, but increased clock speed and current.
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SophiaPav
08-01-2016, 11:26 AM #3

Under maximum load, the CPU stays at a fixed power draw of 15W TDP, providing better performance per watt (rising from 2.3 GHz to 2.6 GHz across all cores). This is what worries me. Identical power consumption, but increased clock speed and current.

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