I have two RAM sticks in a motherboard, one has 2400mhz speed and the other is 2600Mhz speed will the two RAM sticks work perfectly without hindering the performance of each other either in crypto mining or just using the PC for task work?
The RAM will work perfectly as they are DDR4 rams based on your frequency and the motherboard does not play any role because the RAM sticks when they are with different speeds the standard in IT is that the RAM sticks will operate at 2400 Mhz which is the lowest frequency.
Of course this would not hinder any operation in mining or every other task that you will be doing in your computer.The ideal would be to use RAM with same speeds but even with different speeds it causes no problem.