There are many ways to precent you from crashing/ Some of the tricks that i have you might know and some that you have never heard. I stumbed upon these tricks myself when i kept getting so much lag that my game crashed. I tried things out some things work some things dont. Before i found out these tricks, i was running around 40-50 FPS but now since i did these and keep doin these everyonce in a while i get around 100-150 FPS (FPS will depend on your computers capibility) with all the games i have, CDRom, MC, Hexxit, Tekkit FTB unlshd. and many more. Ive tried this on the crappiest computer I have (2002 windows Xp 32Gb) witch ran at 10-15FPS on MC and even lower on modpacks. now it runs around 40-50 ( i know thats slow but its an old computer). These tricks can optimize computers, ( so far only Windows. Im not familier with Mac) I bet by now that if you read this far, your dieng to know my tricks. Right now you can. Just download the file (link in the 2nd spoiler. just so peaple have to read this :D). If your still reading this, these tricks can help with any computer ( Windows XP -8)