Re: PhoenixMiner 5.8c: fastest Ethereum/Ethash miner with lowest devfee (Win/Linux)

4x 6600 XT/ Hiveos

GPU1: Unable to prepare kernels: clCreateKernel (-46)

-clkernel 1 - auto select. work -clkernel 0, but stale shares 2-4%.

Ubuntu 20.4.3 ( no HiveOS)
AMDGPU-PRO-21.30 drivers amdgpu-pro-install -y --opencl=rocr --headless

I am not using -clKernel just PhoenixMiner decide as it will pick the right one, see releasenotes.

The only settings for RX 6600 XT are as follows:
-acm
-gt 14
-ttj 70
-hwm 2
-coin eth

MH/s 28.719 ASRock Challenger Pro 8GB RX 6600 XT

I you have any ideas for improving hashrate share your ideas.

Here are some tips.

-clKernel It is just instruction for the miner what type of GPU you have. When it works fine with default don't need to change it.
-acm You don't need this command for the RX 6600. It works only on Polaris and older cards.
-gt 14 You can improve a little bit hashrate from here, but I prefer to leave this on automatic because over time when the epoch grows or after you change clocks/voltages this number will change too. So you need to check periodically what this number would be.
-ttj 70 This command will do nothing because the RX 6600 does not report junction temp. Is better to use -tt <n> and/or -ttmem <n>.

Hashrate of 28.719MH/s is the default settings for this card. I would recommend you to start with these settings:

Code:

-cclock 1100
-cvddc 675
-mclock 1100
-mvddc 1250

This is what I use for my Gigabyte RX 6600 XT. Try if it works for you for a couple of days. Then you can start changing your numbers slowly until you find the sweet spot.
More options for tuning you can find in the Readme file in the miner's directory.

Actually the RX 6600 XT does report the ttj and I have set it -ttj 65 and PM reports the Tj 64C so it seems to work, at least on my card.
I'll play around with your suggested settings to find some improvements.
My settings now:
-cclock 2490
-cvddc -100 - Apparently you have to set it to relative values.
-mclock 1020
MH/s 29.565 at the moment, so a slight improvement

That was before your suggested settings, thx