Crisis Core: Final Fantasy VII - ULUS10336

[Mr.Wabblez]

Hey guys I have a problem. The game works but it's very choppy/laggy. In the cutscenes and battles I get massive slowdowns (the fps randomly drops from 30 to like 15 or so). When I'm just exploring and running around the fps is a bit better but the game still stutters every few seconds.

This is my pc config:
PC: Intel Core2Duo E8500 at 3.16Ghz
RAM: 4Gb
OS: Windows 7 64-bit
Graphics card: NVIDIA GeForce 9800GT 1Gb
Graphics card driver: 306.97
Java: Version 7 Update 9 (I have both 32-bit and 64-bit installed)

I'm using jpcsp 2810 (64-bit) with these settings:
Only GE graphics
Use vertex cache
Use shaders
Use a Geometry Shader for 2D rendering
Enable saving GE screen to Textures instead of Memory
Enable decoding of indexed textures (using CLUT) in shader
Ignore invalid memory access
Use Media Engine
Decode audio files with SonicStage
Use compiler (dynarec)
Maximum method size: 50
Anti-aliasing: OFF
Resolution: Native

So is this performance normal for my PC or I'm doing something wrong?

Thanks in advance