![]() All these values can be read out and used quite easily via the NVAPI (programmer interface). The firmware (and of course Boost) can now ensure that this maximum value is never exceeded for a longer period of time and that the default value is maintained again in a larger interval. Thus, NVIDIA understands Total Board Power (TBP) as the power consumption of the entire graphics card including fans and RGB gadgets! We can see in the yellow highlighted area that both the GPU and the memory and all other consumers including their voltage converters (and their losses), as well as the losses of all components and even the board are included. We see here as “Current Sense” the two places where the currents (and voltages) are sensed and where then in the “Power Monitor” the data is generated for the firmware to meet the power budget. Now let’s look at the graphics card as a scheme. So the whole thing is basically nothing else than my already shown measurement setup and thus also valid for the TOTAL card! ![]() The voltage difference can be used to infer the flowing current and, together with the output voltage downstream of the shunt, even the power consumption in watts (W). The whole thing is then calculated with a suitable monitoring chip, which can usually monitor up to four channels. 1.5 to 5 watts (depending on the flowing currents) that occur here do not yet fall into the TBP budget (power limit) of the graphics card. The very low impedance longitudinal resistors (shunts) used produce a small voltage drop, which is made possible by two voltage taps (before and after the resistor). ![]() This task is done, similar to my already shown measurement setup, with so-called shunts in the input area just before the filtering directly at the respective rails. at the respective external PCIe sockets (Aux) and the motherboard slot (PEG) BEFORE the respective consumers are supplied. NVIDIA’s monitoring is done on the board at the respective 12-volt rails, i.e. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |