Java 64x bit despite 64x bit system does not work?

I have the problem that last night I tried to play a modpack in Minecraft. (Attack of the B-Team) However, the message came that I have assigned too little Ram. So after some research I downloaded the 64x bit based Java version. Afterwards I put the whole thing on the required 2 GB. However, after that I could not play the modpack because it hung in the loading screen of Forge after that I wanted another game (Tekkit lite) but this did not work anymore.

I've added some system information in the attachment.

It is only insg. To the 2,7GB of RAM at leisure. Strongly guess that your RAM is full.

And is there a way to fix this?

See if in msconfig the memory is hard limited.

That should not happen, but when I was young and stupid,
Software has sometimes limited my memory to 100MB.

And is your operating system EBENFALLS 64bit?

Yes as seen in the picture.

I have to honestly admit I'm surprised. My PC has always needed at least 4GB RAM for Modpacls…

Have you ever tried reinstalling the modpacks (or maybe loading a special launcher)?

There's only system. I do not know if that refers to the OS.

Well, I try it on the Technic Launcher. And yes, I've already tried reinstalling it. But without success

Nonsense, I have 2GB Ram available and that's enough for 64x Java / AttackOfTheBTeam. The RAM is not.

These are 2 different things / mods

What are two different things? The "/" should mean "both as well"