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"-XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1024m -XX:MaxPermSize=128m"
and wont let me go past -Xmx2048M -Xmx1024M aka 2gb I tried your thing and it sadly crashed the launcher xD (idk how that worked) but it sadly didn't work :/