Hashrate on what exactly?
If you are talking mining then it may not be the GPU, it may be the difficulty level of what you are trying to mine.
I mining bitcoin, with i7 4790k and 16gb ram with a asus maximum hero vii. It is not the coin im mining, and the internet is full of people complaning about r9 390x 8gb only diliver half hash rate. If i go linux there is no problem and i get 33-34/mhs. Its only in windows , why is that ?, what causes that, and what can i do. I have new drivers installed on gpu/mb/windows !.
Try downloading and installing the Adrenalin 2019 19.12.1 drivers and see if they have a "Graphics versus Compute" option in the drivers for the R9 390x as a starting point.
Based on what I have looked into so far.
Linux is free.
Windows is not.
Mining is about profit.
There has been lots of effort creating specialist VBIOS, specialist drivers and software in Linux for GPU mining.
It seems that is the reason.
More effort has gone into developing mining drivers and software on Linux.
The R9 390X is a very power hungry GPU.
Most miners used R9 390 instead.
Even then there are far better, more modern GPUs to use than an R9 390X today.
If you go on youTube there are plenty of up to date examples of people running latest AMD GPUs for mining.
There are some examples of people running R9 390 as recently as April 2021.
I suggest you look those videos up and see if they can help.
I still need a answer WHY they could make 34 hash before and only half now !. it is not the dag size for this card. And in linux they have always done good also 5 years ago, so what is, it that makes them run at half power on windows ?. My vega64 runs great , no problems at all. Nvidia have a old gtx1070 no problems there, im just curies what it is, and how to fix it, im pretty sure there must be someone who knows the tecnical details.
RE: I still need a answer WHY they could make 34 hash before and only half now !
No need to be like that.
I am not sure what hash rate was achieved in Windows for what 3 years ago.
I have seen videos stating the hash rate on the R9 390 is/was far higher on Linux than on Windows, probably for the reasons stated above, namely lots of developers working to improve performance on Linux.
In any case.
Here is an article about the Graphics versus Compute modes on AMD GPU drivers for mining:
A new toggle in Radeon Settings that can be found under the "Gaming", "Global Settings" options. This toggle will allow you to switch optimization between graphics or compute workloads on select Radeon RX 500, Radeon RX 400, Radeon R9 390, Radeon R9 380, Radeon R9 290 and Radeon R9 285 series graphics products.
Radeon Software now supports compute workloads for up to 12 installed Radeon RX 400, Radeon RX 500 or Radeon RX Vega series graphics products on Windows®10 system configurations."
I have an R9 390X installed on this PC System I am using at the moment.
I am running Windows 10 Pro 64bit.
I am using the Adrenalin 2020 21.3.2 Driver.
There is no Graphics versus Compute option for the R9 390x or for the RX Vega 64 Liquid or PowerColor Red Dragon RX Vega 56 I have fitted to the PC.
There was a special mining driver for RX Vega GPUs just after they launched from memory...
Looks like that one worked on R9 390 series GPUs.
Why is there no GPU versus Compute setting in Adrenalin 2020 21.3.2 now?
You would have to ask AMD.
Perhaps changes to Windows make it obsolete or AMD are not interested in putting that option on their latest gaming drivers.
There is another option to look at though but it does not seem to make sense to me.
I will take a look and see and report back before discussing it further.
I just downloaded and installed the following driver:
Yes thanks, you have helped alot, and sorry if i sounded rude regarding (i still need answers)!. i will try out your suggestions and report back. I have also seen winsdows users complaning about windows using there vram when rendering heavy workloads , and windows havent replied with one single answer for 4 years. Problem here is that i can see the gpu (R9) is capable of doing 33+mhs but for some reasons it struggles, something is holding it back in windows.
Thanks alot for your help !