Play with the repeat rate and the delay.
I'm having a trouble with my pc keyboard keys, I open notepad and when I hold on any key it prints fast right?, well it gets laggy and prints really slow when I press & hold on any key,
I tried it on another pc and it works fine, so the problem is with my pc (not the operation system because I have 2 different operations and Its the same)
This got me losing 50$ for buying 2 keyboards .... I need help !