Not sure what causes this (other than it only happens when I play FTB) but while playing the newest build for FTB if I go to far or play for more than about thirty minutes my game will slow and stop within about ten seconds and my comp will alert me it has run out of memory. I'm not tech savvy at all I know my way around computers but I couldn't break down a code or hardware and fix it so I'm sorry if I don't know how to give 100% accurate details. I have a computer built for designing and creating 3D models for games and I can run multiple other games at the same time and not have any errors but running FTB Beta drains my comps resources to the point of the above statement. The 1.2.5 version is fine but trying to keep the new one up kills my comp forcing me to shut down the instance which instantly fixes the lag on my computer. I'm really not looking for a fix asap just alerting you to this so that it can be looked at and maybe fixed before you go live with the full version. Also I have no bug reports because the force shutdown of the instance doesn't seem to keep those and it always reverts me to an earlier position than when I lagged and ran out of memory. I have not changed the settings for RAM either.