Update your post to include full system hardware specs and OS information.
Why is "only reaching 50%" an issue?
Is the system overheating or otherwise having some problem(s)?
More information needed.
What temperatures are the system and components hitting?
How are those temperatures being reported? Likewise the fans and respective fan RPMs?
What is the current fan configuration? If possible take a couple of photographs and post here via imgur (www.imgur.com)
Mark up or otherwise explain airflow directions.
Someone might spot something amiss.
= = = =
It is one thing to run hot and the fans cannot go beyond 50%.
It is another thing if the temperartures are in the proper ranges and the fans only need to run at 50% to keep the system and components cool.
Noted the 1,000 watt PSU. Seems to be a lot of wattage but your component list is a hefty load. (Note: I have sig's "off" almost all of the time.)
Use three or four of the calculators in the following link to get a concensus on the power demands of your build.
https://www.tomshardware.com/reviews/best-psus,4229.html
May not be related to the fan speeds but you certainly need to ensure that the PSU is up to the task. Especially at peak power demands.
"but I can assure you it's all good, I mined on this pc for months on end with both gpu's and the cpu running at full capacity 24/7, never had a hiccup, in that time the gpu with the current fan issue used to work well (summer or winter, pc case unchanged), it's only with recent drivers that I have noted the oddities in the fan curve if not manually applied and left on default "
Perhaps the past mining history is starting to show some consequences. Mining likely accelerated the EOL for some components and the results are now showing up even if no longer mining per se.
Agree with the preceding post. Discover if you can or cannot control the fans via AfterBurner or some other applicable utility.
Increasing temperatures without the necessary cooling fan speeds or controls may end badly.
What temperatures are the system and components hitting?
How are those temperatures being reported? Likewise the fans and respective fan RPMs?
What is the current fan configuration? If possible take a couple of photographs and post here via imgur (www.imgur.com)
Mark up or otherwise explain airflow directions.
Someone might spot something amiss.
= = = =
It is one thing to run hot and the fans cannot go beyond 50%.
It is another thing if the temperartures are in the proper ranges and the fans only need to run at 50% to keep the system and components cool.
Noted the 1,000 watt PSU. Seems to be a lot of wattage but your component list is a hefty load. (Note: I have sig's "off" almost all of the time.)
Use three or four of the calculators in the following link to get a concensus on the power demands of your build.
https://www.tomshardware.com/reviews/best-psus,4229.html
May not be related to the fan speeds but you certainly need to ensure that the PSU is up to the task. Especially at peak power demands.
Not sure about the air flows within the case.
= = = =
As I see things that is more than a "little dust".
Just as a matter of general maIntenance: power down, unplug, open the case.
Important parts being "power down" and "unplug".
Clean out dust and debris.
Verify by sight and feel that all connectors, cards, RAM, jumpers, and case connections are all fully and firmly in place.
Again, if the temperatures are within spec, the GPU fan running at 50 % is somewhat moot.
50% may be all that is needed to cool the build.
Clean out dust and debris - % may drop even more....
Just open the BIOS and see what's what.Seems when it's cold ambient there no issue, But I've seen the fan issue when it's hot ambient, here my AMD control panel reading:
View: https://imgur.com/r2sAUKx
Here you can see there nothing wrong beside the fan at full load not going up, but I think what I really need to show is when pc gets wrong rpm's, but I don't have the right ambient to show that.
Just open the BIOS and see what's what.
Fans are maxed out during mining to cool the junction. Higher VRAM clock = better hashrate.
The chip staying cool is collateral. AMD chips under 90 degrees C aren't usually a reason to start a 50 percent+ wind.
She might be depressed....When this gpu was new, it would regularly automatically allow it's fans at any given rpm's to stay under 75c, now on hot days it's doesn't do that anymore!
She might be depressed....
Anyway, if you didn't change the temperature curve, someone else has been playing with your toy. Like people, GPUs don't change. When to start a fan, how much power it gets, when to stop, when to shut down, .... is written in its BIOS. Looking in the BIOS and seeing what's there is a bit more elegant and safe than tweaking voltages and creating loads, to see if anything happens.
Get the Vega64 running on virgin AMD drivers and keep it away from Windows. Maybe she'll start acting like herself again.
without stepping away from the default automatic fan curve and as such not utilizing any third-party app to remedy the issue manually!