Pode tentar o GPU reader da Nvidia:

http://www.nvidia.com/object/gpureader-faq.html

Mas suspeito que sendo uma gráfica OEM da Sony obrigará a controladores assinados e disponibilizados pela própria Sony.

Aliás no site da Nvidia tem uma nota nesse sentido:

"... this is a reference driver that can be installed on supported NVIDIA notebook GPUs. However, please note that your notebook original equipment manufacturer (OEM) provides certified drivers for your specific notebook on their website. NVIDIA recommends that you check with your notebook OEM about recommended software updates for your notebook. ..."

Aqui:

http://www.nvidia.com/download/driverResults.aspx/71706/en-us