VRMS stands for root-mean-square voltage, which is a measure of the strength of an alternating current (AC) signal
. It is the square root of the time average of the voltage squared
. The RMS value is used to describe the equivalent DC voltage that would be required to produce the same power as the AC signal
. Some key points about RMS voltage include:
- It is used for AC voltages, which are time-varying and sinusoidal in shape, unlike DC voltages, which are constant over time
- The RMS value is different from the average voltage, as it represents the voltage that would produce the same power as the AC signal, not the simple average of the voltage values
- The relationship between RMS voltage (VRMS) and peak voltage (Vpk) is given by the formula: Vpk=2VrmsV_{pk}=\sqrt{2}V_{rms}Vpk=2Vrms
- The RMS values of voltage and current multiplied together give the actual power, which is a vital factor when trying to do quantitative power and energy experiments
In the context of power supplies, VRMs (voltage regulator modules) are used to control and lower the voltage sent to CPUs and GPUs
. They ensure that the voltage supplied to the components is consistent and steady, and they are especially important for overclocking a CPU or GPU
