Hexxit and Tekkit Crash Constantly

[AfroNinjaIsEpic]

Every time I play on Hexxit, Tekkit, and now Hack/Mine, (I haven't tried any of the other packs yet) I can play for a maximum of 10 minutes. After 1-10 minutes, the page goes 100% white and the game crashes. Most times there isn't even a crash report. This has gone on for 2-3 days now (I think) and I have no idea what is going on. Every time I want to load a mod pack, I refresh my laptop. When I first downloaded Technic, I could play it for maybe even an hour without crashing. Please help!  P.S... if your still reading this long post your awesome!   (Btw, I don't have a crash report)