Check if your EEprom is enabled and if yes, be sure that speeds are not set to unrealistic values here. It can be a problem to switch from Repetier to Marlin or viceversa.
I am running motors and 2 extruders with DRV8825 only and Marlin with no issues at all and thousands are doing the same, so forget about step pulses etc.
I am running motors and 2 extruders with DRV8825 only and Marlin with no issues at all and thousands are doing the same, so forget about step pulses etc.