Question Need Help with a new motherboard due to pc under preforming

Aug 17, 2019
Hi guys, I am fairly new to PC gaming and I picked up an advent Centurion Ci 5231, I though it was a good 2nd hand purchase as I got it for $200 , As I play competitively on all my games I bought a 144hz monitor I reach the frames but drops hugely no reaching the 144 half the game even if I cap them at 144 or lower sometimes it will never stay capped I have a filling its the Mother board and gpu and cpu, as I know they are out dated also my ram could be higher, I would like some ones opinion in which Mother board would fit my case as its going to be the same case any help would be amazing as I am having a hard time deciding what it is

Details about my PC
-Gpu RX 460 Graphics card
-System Model Centurion Ci 5231
-System Type x64-based PC
-Processor Intel(R) Core(TM) i5 CPU 650 @ 3.20GHz, 3201 Mhz, 2 Core(s), 4 Logical Processor(s)
-BIOS Version/Date American Megatrends Inc. 080015, 8/23/2010
-SMBIOS Version 2.6
-BIOS Mode Legacy
-BaseBoard Manufacturer FOXCONN
-BaseBoard Product P55A Series
-BaseBoard Version 1.0
-Installed Physical Memory (RAM) 8.00 GB
My monitor is a AOC 144hz free sync connected to my pc by Dvi