Like I said, you simply can not run a server with 128 tickrate on a low end processor.
A config for 128 tick will not do anything nor is there any, as everything is managed by CS:GO when you assign the tickrate.
If you want to run a 128 tickrate server you are going to need a MINIMUM 3.3GHz CPU processor or higher.
Even an older model, something like
Intel Xeon X5680 @ 3.33GHz can do the job.