I am using RX480 and sometimes I have similar situation. While the GPU consumes 106W of power, it is impossible to use 0%. Ignore this. No problem.
In the beginning was cougar 600vte 80 bronze
Already worth a new power supply Xilence Performance A+ XN061 530W
in the Wattman program changed nothing
After replacing the power supply stopped lag
But these jumps concern me (photo) (sorry xd i ru people my eng very bad i use google translate)
My friend doesn't have such leaps, and also 570 he has
Perhaps you can recommend some settings in whatman
And so after changing the power supply stopped lag but there are jumps
Ah kinda expected the PSU to have some sort of impact on the jumping part.
What brand of RX570 do you have?(Seeing the clock I am guessing Nitro+ from sapphire).
The "new" psu is a bit weaker if you check the specs for it the 3.3v, 5v, 12v and so on.
The spikes might be due to powerlimits overall(kinda unsure). Could you go to wattman and set the powerlimit to +25% and do a few tests and see if the clocks are more stable(this may shut down the system if the PSU is bad or weak but it will help us understand if the PSU can really handle it well).
Try to do some tests with Furmark, it only happens to me in games but when I activate the funmark it doesn't happen to me. I use a PSU of 600w coolermaster, you format, and install windows again?
With furmark totally perfect.
I run with the GTA V i have the spikes.
I totally understand your point however I do still believe the problem is the PSU because you haven't shown how the CPU runs during these games. What CPU do you have? How are the temps for it and so on. The reason you're seeing furmark being alright is that it puts heavy workload only to the GPU.
Try furmark and prime95 at same time, would be interesting to see if that may show my theory kinda correct.
If there is a problem with the PSU, the system will not function stably. PSU replacement allows 12V source to change. It only changes temperature of the graphics card by 1-2 degrees. Or it prevents stable operation. that's all ... OP is having a bottleneck problem. The processor is weak. Or the driver is causing a bottleneck. If you don't have any stabilization problems, don't try to buy a different PSU...
You might have point with the CPU being weak which is why I asked what CPU he may have and how is the utilization when he plays games.
As for the PSU question, I was thinking since he was talking about games. That is when the whole system is pulling power from the PSU and the PSU can't deliver which may cause this instability. But in the end we have to know what CPU he has and what temps/utilization is going on when he plays games. It would help us knowing that so we can help him.