Tripolygon
Banned
You still don't seem to get it
Hobbygaming
so I will let Mark Cerny explain it to you.
Temperature is what ultimately determines the operating fan curve but it does not play a role in their variable frequency strategy. As it would cause each chip to perform differently depending on ambient temperature.
Noise does not factor into the PS5 variable frequency strategy. It is about power draw when the processor is doing actual work.
"We don't use the actual temperature of the die, as that would cause two types of variance between PS5s," explains Mark Cerny. "One is variance caused by differences in ambient temperature; the console could be in a hotter or cooler location in the room. The other is variance caused by the individual custom chip in the console, some chips run hotter and some chips run cooler. So instead of using the temperature of the die, we use an algorithm in which the frequency depends on CPU and GPU activity information. That keeps behaviour between PS5s consistent."
Temperature is what ultimately determines the operating fan curve but it does not play a role in their variable frequency strategy. As it would cause each chip to perform differently depending on ambient temperature.
"The behaviour of all PS5s is the same," says Cerny. "If you play the same game and go to the same location in the game, it doesn't matter which custom chip you have and what its transistors are like. It doesn't matter if you put it in your stereo cabinet or your refrigerator, your PS5 will get the same frequencies for CPU and GPU as any other PS5."
"The time constant, which is to say the amount of time that the CPU and GPU take to achieve a frequency that matches their activity, is critical to developers," adds Cerny. "It's quite short, if the game is doing power-intensive processing for a few frames, then it gets throttled. There isn't a lag where extra performance is available for several seconds or several minutes and then the system gets throttled; that isn't the world that developers want to live in - we make sure that the PS5 is very responsive to power consumed. In addition to that the developers have feedback on exactly how much power is being used by the CPU and GPU."
Mark Cerny sees a time where developers will begin to optimise their game engines in a different way - to achieve optimal performance for the given power level. "Power plays a role when optimising. If you optimise and keep the power the same you see all of the benefit of the optimisation. If you optimise and increase the power then you're giving a bit of the performance back. What's most interesting here is optimisation for power consumption, if you can modify your code so that it has the same absolute performance but reduced power then that is a win. "
In short, the idea is that developers may learn to optimise in a different way, by achieving identical results from the GPU but doing it faster via increased clocks delivered by optimising for power consumption. "
Noise does not factor into the PS5 variable frequency strategy. It is about power draw when the processor is doing actual work.