System requirements for shaders...

[Aredo]

According to Nvidia's specifications your card should support shader model 3.0 and DirectX 9.0. The GPU-Z utility may just be unable to read shader and memory clocks correctly. Not sure, why shaders in JPCSP don't work though. In any case I recommend you to try if this happens with discrete video card, because integrated cards may miss some important graphics extensions and may be too slow for JPCSP too.