Here
https://teamredminer.info/documentation/arguments/#clockvoltage-control-options-windows-only-beta-functionality
Described clk_core_mhz, clk_core_mv and etc command line arguments
But miner wan't start with this parameters: unrecognised option '--clk_core_mhz=1280'
So, is clocks/voltage settings supported, or no?

The new beta version is finally ready. You can download PhoenixMiner 5.7b from here:

https://phoenixminer.info/downloads/PhoenixMiner_5.7b_Windows.zip
https://phoenixminer.info/downloads/PhoenixMiner_5.7b_Linux.tar.gz


Changes in version 5.7b (since 5.6d):

• Added lock core clock
• Implemented new "turbo" kernels (-clkernel 3) for AMD Polaris cards that can work with the current DAG sizes over 4 GB. Note that -clkernel 3 uses double the VRAM and will
  provide slightly faster hashrate with slightly higher power consumption. You can use the -rvram command-line parameter to specify how much VRAM to be left unused
• Increased the maximum supported DAG epoch to 600 (i.e. until about Sep 2023)
• Implemented full hardware control for AMD RX6900/6800/6700 cards under Linux. Note that with these cards under Linux you need to specify relative core voltage: e.g. -
  cclock -50 will set the core voltage to be 50 mV under the default value
• Added ROCr kernels for Vega, Radeon VII and Navi cards. With these kernels you will be able to run these cards with Linux drivers 20.45 and later but the performance will
  be lower than with the older PAL drivers and kernels. We recommend using AMD Linux driver 20.30 for all cards except RX6900/6800/6700
• Fixed an issue causing crashing with some RX6900/6800/6700 cards under Linux (there is no need to run these cards with -clkernel 0 anymore)
• Added support for AMD Windows drivers up to 21.8.1. Note that Radeon VII cards will not work with drivers 21.6.1 or higher - you need to use older drivers for proper
  operation of these cards
• Added support for AMD Linux drivers up to 21.20 (use older drivers for Vega or Radeon VII cards as they will not work with 21.20). Note that the latest 21.30 drivers are
  not supported (and the initial testing shows that even the older Polars cards are not working properly with them, so avoid 21.30 for now)
• Numerous other fixes and small improvements

Please let us know if you have any problems or questions related to PhoenixMiner 5.7b

No, I use ethermine. Started with them way back from day one.
Once I find something that works I usually stay with it. But, if there is sufficient reason to change I will always.

Currently running at 0.54% rejected. What do you think. Too Hight ?

Yea, I've see a lot of reports about those type cards and issues. Fortunately for me, I started mining years ago and got all AMD cards at a pretty good price back then and those were some of the first cards Phoenix supported. So it seems for those cards most all the bugs were eliminated a long time ago. For me I don't have any of the issues reported by other cards, and I don't plan on purchasing any more cards at this point.
Thanks for commenting..

-clgreen 1 is currently not supported. Why would you like to trade higher hashrate for lower power consumption and lower hashrate at the current ETH prices?

clgreen is incompatible wit clkernel 3. clkernel 3 overrides clgreen.

Here it is. One exception, I had turned -clgreen off in this run.

I am highly pleased with the new 5.7b release.
Absolutely no issues with the upgrade and my overall hash rate went from 166.75 to 167.25.
I am using the -clKernel 3 settings and -clgreen.
I have 5 Radeon RX580 4GB Cards. I mine ETC.
Thanks Phoenix for the new code.

PhoenixMiner 5.7b is officially released. You can find the download link and the checksums in the first post of this thread.

It is the same release as the one that was posted here as beta version, so if you are already running it, there is no need to upgrade.

Note that 5.7b supports the latest AMD Windows drivers 21.8.1 but it doesn't support the latest AMD Linux drivers 21.30. If you have AMD 6x00 card and you want to use Linux, you should use AMD drivers 21.20 but for any older AMD cards, you should stick with AMD drivers 20.30 (the latest stable PAL drivers without bugs).

Well, we just got tired of reports of aggressive (and in some aspects suboptimal) Polaris straps that caused the DAG build read/write pattern to crash gpus, so we defaulted to a very slow and safe version. For continuous ethash mining it's 4-5 secs extra every 4.5 days, 0.0016% penalty, but naturally worse if you switch between epochs more often for some reason, or crash every 2-3h and restart the miner.

I honestly don't remember exactly what type of cap we ended up with, but try adding --eth_dag_slowdown=0 and check the DAG build time.

The new features in this release (since 5.6b) are:

• Lower percent of rejected/stale shares when mining on Nicehash