Technic Defaults to 1Gb RAM RAM = Random Access Memory. Imagine 1Gb = 1 Year Old. Technic default to a 1 year old. You need a 4 year old to play this game imagine a baby trying to mine iron... windows shutdown noises
Please increase your RAM to at least 4Gb. Or 4096Mb (1GigaByte/Gb = 1024MegaByte/Mb).
You will be able to run the game faster/better.