Figured it out, conky/system monitor is reporting buffer/cache memory(
http://www.linuxatemyram.com) as used memory but really every thing is fine, in top or system monitor can't see any processes that are using up a lot of memory but conky/system monitor is reporting 5 of my 8 gigs of ram are used, in Top reported 1.5 gig of ram is used, 1.2 is free and 5 gigs are buff/cache. Been running UE5.0 on my main machine for a week now and been playing games on Steam like ETS2, XCOM:EU and Guns of Icarus(so hardware demanding games) have had no issues in performance or crashes, system is holding up great.
I also just noticed that conky is saying my cpu is 3.2ghz but it really is only 2.3ghz, it's just conky thats buggered up not any thing with UE5.0 it's self.
top - 14:49:03 up 3:15, 2 users, load average: 1.52, 1.46, 1.45
Tasks: 238 total, 2 running, 236 sleeping, 0 stopped, 0 zombie
%Cpu(s): 13.5 us, 4.2 sy, 0.0 ni, 81.6 id, 0.8 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 8069588 total, 1182252 free, 1626064 used, 5261272 buff/cache
KiB Swap: 7999484 total, 7999484 free, 0 used. 1884104 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
20263 flint 20 0 2097096 692552 122176 S 3.7 8.6 14:27.40 firefox
5640 flint 20 0 1102748 622356 38244 S 1.3 7.7 2:11.99 gtk-window+
1013 root 20 0 597560 91136 71852 S 9.3 1.1 15:56.83 Xorg
5281 flint 20 0 638732 87136 60524 S 5.0 1.1 8:42.99 compiz
5296 flint 20 0 817676 50472 28660 S 0.0 0.6 0:04.96 nm-applet