The new beta version is ready. You can download PhoenixMiner 5.4b from here:

The new features in this release are:

• New kernels for AMD Vega and Navi GPUs that are slightly faster when the DAG buffer is approaching or passing 4GB in size (the current ETH DAG is close to 4GB). To use these new kernels, you need to use drivers 20.5.1 or later under Win10, or 20.10.x or later under Linux
• Automatic re-running auto-tune as needed when switching to a different DAG buffer type (e.g. when switching from ETH to ETC, or back)
• Added support for the latest AMD Windows 10 drivers 20.12.1 and 20.11.3
• Fixed crash when trying to set -mvddc on very old AMD drivers (including the beta blockchain drivers from 2017)
• Other small fixes and improvements

Some notes on the best (or at least some of the better) drivers for AMD cards:

• If you have 6GB or 8GB card that is at least Polaris (i.e. 470/480/570/580, Vega, Radeon VII, Navi), you should run at least driver 20.5.1 under Windows 10, or driver 20.10.x under Linux.
• If you have 4GB Polaris card (i.e. 470/480/570/580), ideally you should also run drivers 20.5.1 or later. At the very least the drivers should be either 18.12.1.1 to 19.7.5 (inclusive), or 19.12.2 and later. Under Linux, drivers 19.x.x or 20.x.x should be OK for 4GB cards.
• Avoid using the 20.40.x, and 20.45.x drivers under Linux.

Please let us know if you have any problems or questions related to PhoenixMiner 5.4b.

The new features in this release are:

• New kernels for AMD Vega and Navi GPUs that are slightly faster when the DAG buffer is approaching or passing 4GB in size (the current ETH DAG is close to 4GB). To use these new kernels, you need to use drivers 20.5.1 or later under Win10, or 20.10.x or later under Linux
• Automatic re-running auto-tune as needed when switching to a different DAG buffer type (e.g. when switching from ETH to ETC, or back)
• Added support for the latest AMD Windows 10 drivers 20.12.1 and 20.11.3
• Fixed crash when trying to set -mvddc on very old AMD drivers (including the beta blockchain drivers from 2017)
• Other small fixes and improvements

Some notes on the best (or at least some of the better) drivers for AMD cards:

• If you have 6GB or 8GB card that is at least Polaris (i.e. 470/480/570/580, Vega, Radeon VII, Navi), you should run at least driver 20.5.1 under Windows 10, or driver 20.10.x under Linux.
• If you have 4GB Polaris card (i.e. 470/480/570/580), ideally you should also run drivers 20.5.1 or later. At the very least the drivers should be either 18.12.1.1 to 19.7.5 (inclusive), or 19.12.2 and later. Under Linux, drivers 19.x.x or 20.x.x should be OK for 4GB cards.
• Avoid using the 20.40.x, and 20.45.x drivers under Linux.

Please let us know if you have any problems or questions related to PhoenixMiner 5.4b.

still no fix for 5.3b running 8GB cards on ETH?

all my 4GB rigs are running fine, but 8GB wont mine

-61 error everywhere, tried -lidag -eres but no help

v12.1:
- slightly improved speed for some cards, about 410H/s on stock 390X, 450H/s on stock Nano, 290H/s on stock 280X, 300H/s on stock RX480.
- slightly improved stability. If it is still unstable for you, reduce "-i" value.

my card 470 8gb nitro  270 h/s for card  

2 x 470 8gb  modded timing 1750 , driver 16.11.5  270 h/s for card

Thank you Claymore, algo ASM works great on 290x, 335sol/s with modded BIOS.
Edit : driver 16.10.1 whql

Did you use the 6 gpu mod?

so what i do now

I know nothing of making custom bios, got a link to some trusted bios that are available?

I get 640 H/s stable ( 640,640,641,639,640,640,640,642 etc) on my 8 gb XFX reference amd 480.

-h count of 1024. I made an excel sheet and did the +/- 32 h count up and down about 10 increments and 1024 gave the most.

Unfortunately, it's not so easy. Linux version of this miner had own sources (I know it's bad, the main reason was that other dev worked on Linux version), they were on dedicated Linux-based system, then HDD crashed and I lost everything on that system, last backup that I have is for v7.0.
Of course I can take latest Windows version and update its sources to be able to compile them on Linux too, but it will take a few days of work, I just don't have so much time right now.

390x 175mh/s
rx480 125mh/s