I was really smooth till it got into a battle, FPS turned to 3-5,

My current configuration :

Video =
[x] use vertex cache
[x] use shaders (experimental)
[x] enable saving GR screen to textures instead of memory
[x]disable optimized VertexInfo reading

Audio : all unchecked

Memory : all checked

Media :
[x] use media engine

Compiler :
[x] use compiler (dynarec)
50 maximum method size

Crypto
[x] extract decrypted EBOOT.BIN files to the TMP folder
[x]Handle SAVEDATA in crypto mode

Display :
Anti-aliasing = off
resolution = native

Processor :i5-2450M CPU , 2.50GHz
RAM : 6 GB
Tipe : 63 bit
Windows 7
Nvidia Gefirece 610M, 1 GB

Any idea? please help