Usually it is good idea to put them in the .bat file (or in the config.txt file, if you are using it). In such case you will need to run auto-tune again if you change the clocks on any of the cards, if you install new version of the driver, or if you try using the alternative kernels (-clkernel 2), as the best -gt values could be very different for the two types of kernels. It is also good idea to check if the -gt values are still the best if you upgrade the GPU drivers or install a new version of PhoenixMiner in the future.

   However if you are restarting your rigs only once a week or so, you can just let auto-tune run at each startup as it takes only a few minutes.


Dear PM I was just wondering what is differnece between Kernels 1(optimized)? and 2(alternative)? Are they specific to any type of GPUs?
Thanks