It likely swings well below 2.0 GHz if it requires it. This all depends on how their thermal and power is setup. The less cooling and less power, the swing will need to be greater. Better thermals and power, the swing should be less.Ok so with Fixed clock power is always at 2.0GHz and it doesn’t work, but with their power shift it can go from 2.23GHz to (single digit percentage drop max of 9%) 2.03GHz? In this case it still means that the GPU is operating the entire time at frequency higher than 2.0GHz. Unless the GPU is allowed to swing much more and scale with workloads?
Also while they don’t want ambient temperatures to affect the performance of the chip, it still must have some type of thermal protection in case it can’t get enough airflow or something. It would probably just shut down with an error and not just 100% ignore temperatures of the chip and possibly damage it.
These swings aren't constant however, they will blip down as required and blip back up.
The question that hasn't really been answered really comes down to what the clock rate looks like when it's under sustained load, because blipping up and down is very fast, we have no real ideal of effective computational output except to benchmark.
Usually with current boost clocks, as the load goes up, boost goes down, if the GPU goes idle it's boosting back to maximum. So in some ways it's boosting through idle, which is desirable, but not an actual measure of work completed. A lot of idle time could signal to the developers that there is a lot optimization that could be done. Unfortunately the behaviour of PS5 is not really known yet. My personal speculation is that it will ride high on clocks using the traditional fixed function pipeline (3D), but with compute shader pipeline where the developers are able to saturate all the CUs in a very effective manner, the clocks will drop when they all go to work at once
A pure compute shader heavy engine like UE5, probably pushes the PS5 very hard on that front I suspect. But the results are still very good.
Yes, there will likely be thermal limits. I suppose it would shut down like any other fixed console would in the worst case scenario. But the thermals will not affect the clockspeed, that should be the workload/activity monitor.
Last edited: