PPSSPP Emulator, Graphics Card Suggestions?

[Artofmagick93]

Hi guys, i have the following spec and it stutters on some psp games, and wii games, hoping to solve this with a new graphics card, here is my spec, hoping for guildance.

AMD Athlon II X4 640
Cores 4
Threads 4
Name AMD Athlon II X4 640
Code Name Propus
Package Socket AM3 (938)
Technology 45nm
Specification AMD Athlon II X4 640 Processor
Family F
Extended Family 10
Model 5
Extended Model 5
Stepping 3
Revision BL-C3
Instructions MMX (+), 3DNow! (+), SSE, SSE2, SSE3, SSE4A, AMD 64, NX, VMX
Virtualization Supported, Disabled
Hyperthreading Not supported
Fan Speed 2742 RPM
Rated Bus Speed 1004.4 MHz
Stock Core Speed 3000 MHz
Stock Bus Speed 200 MHz
Average Temperature 54 °C

Ram

Type DDR3
Size 8192 MBytes

Graphics

VIDIA GeForce 7300 SE/7200 GS

Thankies for any assitance.

Alex