what for you want 32 bit? 64 bit will give some boost… and a slick system, what as far as i know Manjaro is not… it is overloaded… Antergos is more slick, as it comes with a minimal configuration and a little number of preinstalled programms.
My wife have system with the same specs as you got, with xfce installed and doing fine, but she have to take care to not open to much tabs, and she do not play games… but watching streaming works nicely but load is high on CPU and also RAM, often it needs to take swap …
[updates once a week] = [90% less problems]
how to add system logs:
wget http://bit.ly/2GCG9k2 && sh 2GCG9k2
:handshake: donate antergos