CPU Instruction set extensions for this game

I had AMD Phenom II X4 945 with old NVIDIA GPU and 2gb RAM which are of course very underpowered (and unsupported), so I decided to do an upgrade, I thought by solely upgrading RAM and VGA the game would work magically, I spent all of my money for secondhand Galax GTX 1050 2gb OC and bought myself a good 8gb ram... My hype was dead when I tried to run Apex Legends and the screen said "Unsupported CPU, No SSSE3 features" and I googled it up, turned out the game basically tell me to change my CPU.. BUT there are no SSSE3 Feature on any processor with AM3 socket motherboard so I needed to change the CPU and Motherboard aswell..

I'm currently planning on buying AMD FX-6100 (which has SSSE3 feature) and an AM3+ socket motherboard butI don't want to be disappointed for the second time, so can anyone tell me every Apex Legends instruction set extensions??

Because I dont want to see anymore CPU-Upgrade related error just after upgrading the CPU.. and yeah also because my budget is very limited.

Thank you in advance :D