Apparently every new dell M1730 has a physx card. Can't see a way to remove it. This could help the install base a little bit 
http://www.dell.com/content/product...b_m1730?c=us&cs=19&l=en&s=dhs&~tab=bundlestab
http://www.dell.com/content/product...b_m1730?c=us&cs=19&l=en&s=dhs&~tab=bundlestab