What is CPU PLL voltage

[Iker]

I wanted to do something clever about the PLL voltage in the BIOS and I have since some may possibly ask someone.

1. Why is the default value as high (2.5v)? All the other boards seem to have the value in the region 1.5v ... and I have often read that values beyond 1.6V harmful to the CPU?
2. If I understand correctly CPU PLL is used to disturbances and frequency of the CPU thereby offsetting more stable, is the frequency of the PLL depends on the voltage?
3. There are AMD / GB of any documentation which worth about? max / min stress, etc?

[Lord of the RIG]

AMD CPU I have found in the document not specified. Regarding Athlon and PLL Voltage found in Google is also rather uncertain, because usually only about what Intel CPUs. And of course, have a different voltage range. I think that MSI PLL voltage from 1.7 V to 3.3 V adjustable. Therefore, the default value could be around 2.5 V, values above 1.6 V probably seem to apply to Intel CPUs. The frequency is not dependent on the voltage but a higher amplitude provides a more reliable signal transmission (too high can lead to damage of course). The PLL voltage seems to be not as often adjustable. In the reviews of Asus motherboards (even more expensive as the Crosshair) in any case was not indicative of an adjustment. They look good no need to change the voltage, so I would expect any miracles from the power.

[Shutdown]

Two things, it is in the chapters on overclocking the MSI N460GTX HAWK clearly stated. Related to both the new beta version of the tool MSI Afterburner would call that brings in connection with the HAWK another special with it. You can spend in the new beta version of the Afterburner - according to this variant HAWK - Voltage menu and expand the reach next to the power of GPU and memory voltage option now also have a MSI which as AUX-voltage means. From a sheet of the manufacturer showing that the of the PLL (phase locked loop) voltage is changed here. In earlier times one could hear Overclocking been here and there, that a slightly higher voltage at the frequency should lead to stable donor overclocking. Today, in almost every motherboard BIOS overclocking options in the appropriate way to raise the voltage of the clock generator.

[StephanieRice]

In earlier times one could hear Overclocking been here and there, that a slightly higher voltage at the frequency should lead to stable donor overclocking. Today, in almost every motherboard BIOS overclocking options in the appropriate way to raise the voltage of the clock generator.

Some find it to stabilize for a secret weapon to the signals, other think it's nonsense, and still others have been run by playing around with this tension already total losses. You should start exercise the utmost caution, want to avoid unwanted smoke on the graphics board. Well, then follows a path from the CPU, MSI-OC-scene, offering the first graphics card manufacturer engagement. In any case, we could adjust that a voltage addition led to this activity to a higher voltage on the "+1" phase of the GPU power. This rather low unreacted phase is in idle at a voltage of 1,056 volts, therefore, under load breaks the tension and we were able to measure 1.043 volts. Moving the slider in the Afterburner to "+10" meant that the idle voltage was increased to 1.070 volts and 1.055 volts under load. A Better overclocking we could not achieve this first.

[Rover]

According to documents provided to us is the first switch to disable the temperature protection. NVIDIA GPUs are equipped with integrated protection against overheating of the GPU. In the case of exceeding a certain temperature, the GPU operates at clock outs against it and if that is not enough to turn off the video card in order to prevent damage. This switch will then turn off this behavior. The second switch, there is still a bit more dangerous, but interesting by the information itself. This is to protect circuit regarding the maximum current flowing off one, or rather increase. MSI referred to as a stored protection at 150 amps of current flow. Flipping the switch to raise it up to a current of 300 amps. Interesting is the information that there is such a protective function - where the value here with absolute certainty on the GPU with, not the entire graphics board. Consider the NVIDIA reference input of 160 watts at the TDP (Thermal Design Power) of the total graphics boards and share typical voltages from 1.03 to 1.06 volts under load in relation to 150 amperes, calculated from an output of just under 160 watts - but these are just off to the GPU needs. The graphics board has of course other consumers to name above all the memory chips.

[RogerFielden]

If we assume for a bill, even in theory, that 70% of the total consumption shall be kept on the GPU back, then stayed by the said 160 Watt 110 Watt round, which would arise on actions of the GPU under load. Shown by the overclocking results we have encountered a power consumption of around 196 watts, which would result in our sample calculation to the GPU power of 137 watts. Are you here now a multi-voltage on the GPU, the total power consumption increases rapidly to nearly 230 watts for the entire board, which would amount to 160 160 watts for the GPU. Here we come now to the regions which fall in this protective mechanism would be. We do not believe that it is really reasonable to disable this protection. However, the information was confirmed that by the time the dip switches in conjunction with voltage addition may well achieve board defects. The user should contact - no matter what graphics card (After Burner is compatible with most graphics cards in the market) - do not rely on what he sets for the tensions. So we have drawn in the tool such as the slider to maximum, which would correspond according to the indicators of a "safe" voltage of 1.087 Volts.

[joel84]

Of course, the MSI Afterburner offers many graphics cards also have the option to increase the voltage so as to achieve higher clock speeds. However, one must be aware that there are therefore side effects. Above all, may perhaps be first to mention the power consumption. We list below a comparison among Furmark Load:

• MSI N460GTX HAWK Default: 173.63 W
• MSI N460GTX HAWK (870/1120 MHz): 195.95 W
• MSI N460GTX HAWK (920/1120 MHz - GPU Voltage 1.104 volts): 233.51 W

By raising the voltage to 1.104 volts (as After Burner 1.037 volts), we reached a GPU clock speed of 920 MHz, which acted apparently stable. The 3D performance increased by the fact - compared to overclock without power addition - about five percent, the power consumption again increased by another 18 percent to now not only regions where a GeForce GTX 470 plays, but also regions in which the Board layout is no longer in view of the TDP is cut. 225 Watts is such a board may take up to two 6-pin power connectors for themselves.

[Joko]

Phase-locked loops, in the context of digital signal processing as a so-called digital PLL, DPLL abbreviated, be realized. Important here is the transition from a continuous-time system to a discrete-time system, and the place of the continuous Laplace transform for the analysis occurs, the discrete Z-transform. One advantage of DPLLs is to facilitate reproducibility. The classification, to evaluate at what extent a PLL as DPLL, is not uniform in the literature. Thus only a portion of the PLL, for example, only the loop filter, as a digital filter can be realized. Typically, the design methods of analog PLL as the basis used for the DPLL. With All-DPLLs NCO, the complete loop including digital circuits built in. Considering frequency and phase of the reference signal as input and the oscillator signal as the output size, the described arrangement behaves like an electrical band-pass , the transmission characteristics by the dimensions of the loop filter is set mainly in. Of particular importance in the application of the PLL as a band pass filter is the fact that it is an automatic tracking of the frequency of the input signal. At the same time, with this arrangement, the possibility to achieve very small tracking bandwidth. It is therefore particularly suitable for the regeneration of noisy signals of varying frequency.