2 ms·
Not on newer processors, at least Intel, due to TurboBoost. Undervolting lowers voltage, but the processor will now stay at higher clocks for a longer time, hi
by bserge 6y ago
Not on newer processors, at least Intel, due to TurboBoost.
Undervolting lowers voltage, but the processor will now stay at higher clocks for a longer time, hitting the same TDP/power limits.
You'd need to undervolt and either reduce Turbo Power Limit or cap the clocks at something lower.
- SomeoneFromCA 6y ago> Undervolting lowers voltage, but the processor will now stay at higher clocks for a longer time, hitting the same TDP/power limits. No,at the same power, but for shorter amount of time, because now it is able do a lot more work per unit of time. So no, you'll definitely use less energy, although dissipate same amount of power. Keeping in mind, that your will be idling 90% of time, if not more, your savings will be even bigger.
- bserge 6y agoYeah, definitely for normal workloads/usage. I'm talking only constant full core load, synthetic tests like Prime95, rendering, or even gaming.
- SomeoneFromCA 6y agoEven in that case, if your CPU cooler can deal with dissipating all the power (without throttling), consumed by the CPU in both cases (normal and undervolted), you'll still use less energy when undervolted.
- bserge 6y agoBut only if it's operating at maximum frequency, i.e. if the clocks are the limiting factor. As long as it's only TDP limited, voltage going down means amperage/current will go up in order to hit the power limit.
- xxs 6y agoPower scales with voltage squared and linearly with freq. Turboboost allows for higher clocks but you'd be getting that with or without undervolting.