So recently, I got a new laptop with 8gb of RAM. Because of this, I need to pay attention to things that are 64 bit and 32 bit and whatnot. I downloaded Java off of the website, but because of all this bit mumbo jumbo, I didn't feel like specifying what version I wanted, because I simply have no clue. I attempted to run Minecraft, which started up with no problem whatsoever, save for the fact that it was running with not even half a gig of RAM.Now, I tried to look up how to do that in the official launcher, but the long jumble of numbers and letters in the Java arguments scared me, so I went and downloaded Magic Launcher, because it's so much simpler. I set the game to allocate 1.5 gb, which worked fine, but when I attempted 2gb and 1600 mb, the game crashed. 2gb gave me a crash log upon hitting test, and 1600 mb ended up in the game crashing 5 seconds into loading a world, and creating a crash log in my .minecraft folder. Eventually I found out that I actually had 32 bit java installed, uninstalled that, and now I sit at the Java website, looking at a list of 64 bit downloads for windows, listed like so:Windows x86 Online: jre-7u67-windows-i586-iftw.exeWindows x86 Offline: jre-7u67-windows-i586.exeWindows x86: jre-7u67-windows-i586.tar.gzWindows x64: jre-7u67-windows-x64.exeWindows x64: jre-7u67-windows-x64.tar.gzNow, I have no clue at all which one is to be installed, but I'm sure that someone on EMC knows what they're talking about when it comes to this stuff. Afterwards, I'd like to know if I need to do anything special for mods, or if I need to do anything else special in order for Minecraft to run without errors.