Wonder why?

[phikhanh]

Ah! I had no a powerful PC, but It's enough for me to finish some games...
Sometime I see the fps drop down ~40, but the CPU runs under 100%. So I wondering why?
My specs : CPU (Dual Core E2220 2,4Gbz), RAM (2Gb), Graphic Card (9600Gt)...
As the pic below...

[zero29]

the scalability of current multi core cpus isn't perfect. the combination of application, operating system and hardware leads to some inefficiency with multiple threads executed. but values around 75% are ok.

[phikhanh]

So, what I can do now? I mean to get higher the fps? Any softs, or some kind of configs that make my CPU working harder around 90%? Thanks first...

[zero29]

update to the latest betas of pcsx2+plugins and activate some speed hacks. check if any background applications like antivirus guards/scans intervene with pcsx2 emulation and update your graphics card drivers. that's it basically. 75% cpu usage is absolutely ok, a cpu is designed to be able to execute many different tasks, so some parts of it will often idle while some other parts are used at 100% constantly.