According to industry sources, three of Nvidia's upcoming 40nm chips, the GT225, GT220 and GT210, are a die shrink or the previous chips.
The GT225 is a 40nm die shrink of Geforce 8800GS that was
rebranded to 9600GSO and recently again to G130 for some OEMs.
The GT220 is derived from 55nm Geforce 9500 generation that also got
renamed to GT120 for special customers,
and this information indicates that the GT220 is nothing more than higher clocked
Geforce 9500 at 40nm. We are not aware of any architecture changes but we can't rule them out either.
The third chip according to our info is GT210 that comes from
Geforce 8500 brand, and now has a fancier Geforce 9400 brand name in 55nm, and
recently it got renamed to GT100. Once they shrink it down to 40nm Nvidia might call
this one GT210, but we have to underline that this branding can be changed.