> Specs
Unfortunately, I think this is your issue. The processor is the most important component for emulation as it does the bulk of the work. Your processor is a dual-core, which meets the requirements of PCSX2, but only has a passmark of 1,244 on the below chart for single thread performance. PCSX2 recommends 1,600 or greater.
https://www.cpubenchmark.net/singleThread.htmlPCSX2 recommends 4GB of RAM, which doubles what you currently have. This is probably necessary for 3D games, but you should be able to get away with less for 2D games.
Having a dedicated graphics card isn't necessary, depending on what you're emulating. PCSX2 recommends a video card with at least 2GB of Video RAM (or VRAM). It looks like you're using the on-board graphics built in to your motherboard, which likely won't be enough for most 3D games. You might find it's enough for 2D titles, though. I used to emulate Fire Pro Wrestling Returns on a PC using on-board graphics, which used 2D character sprites on 3D backgrounds. Performance will vary by game.
You can find a bit more info on the requirements here:
https://pcsx2.net/getting-started.htmlIt does mention that the minimum spec suggestions are based on the requirements needed to run the more intensive PS2 titles. My processor exeeds the recommended 2100 pass mark, but I still find some games don't want to run full speed. The PS2 is a tough system to emulate, much more so than the Wii/Gamecube.
Here is a forum post that notes some of the less CPU intensive games. As you found out, Kingdom Hearts is regarded as easy to emulate:
https://forums.pcsx2.net/Thread-LIST-Games-that-don-t-need-a-strong-CPU-to-emulate> Encoders
Damn, I was quietly optimistic about this one helping you out. You could always try looking on YouTube for low spec PCSX2 settings. I've followed quite a few different tutorials on it for increased performance and never found anything that drastically helped, but it might be worth a try.
> PAL vs NTSC
In that case, I'd recommend you use 60hz mode on any PAL games that support it, or if not, the NTSC versions of any games you plan on playing. If the performance is the same and you're getting more FPS, then it's not taxing your system any harder, so you may as well.