You can up the cpu priority by going into options and then under the CLI tab. I haven't actually noticed or tested if the higher priority improves speed but it should. It's limited to the processing power of your computer (which is your processor/cpu). Although it does take me generally longer to convert with HandBrake than it does with other programs.

 

you dont have a powerful enough computer lol. I can do a 2 hours movie in about 45-60 minutes and that is the standard priority for the CPU

 

Use ffmpeg. It's faster and more compatible anyways. Just make sure to add one automatic audio layer in AAC.

 

you laptop doesnt stand a chance....thats close to the spec on mine, its just not a big enough horse. you need a good desktop