@gyopsie said in your system does not support this title:
AMD Phenom II X4
The AMD Phenom II don't have AVX instructions but... the AMD FX , yes, have. And this is a solution for you, check if you Motherboard have Socket AM3+ and chipset compotible with AMD FX CPU. For example, if you Motherboard have chipset Nvidia 7025/ nforce 630a you can upgrade you CPU for a FX Buldozer 1º GEN (for example, a FX 8100), and this CPU can run PSO2 (no are the best option but... are old CPU with AVX).
But if are a Chipset AMD 760G or Superior, you can upgrade you PC to a FX 8370. This CPU in Second hand cost 50$ or minus.
In case that no have AM3+, need change the Motherboard, CPU and RAM... if you seach for a cheap upgrate, the best options are a i5 4º Gen (the minimun recomended for play) or a Xeon socket 2011 (chipset x79 or x99) the kits from China with the E5 2689 and 16 GB of Ram cost 100$ or a 130$ for a E5 2620 v3, in this case, have AVX 2.0.