Frankly I'm inclined to say it's damn near a waste.
For many games, 16MB is still enough. There are few games that truly need more then 32MB.
Even at 1600x1200x32bpp most games don't see much of a gain from going to 32MB to 64MB of graphics memory, albeit there are a few select gaming applications that do see gains of a much as 10-15% under the right conditions.
I find it extremely unlikely that more then a very small select handful of gains will see much of a benefit at all, unless your the type to be using FSAA at 1600x1200x32bpp... in which case I can well believe that 128MB of RAM would yield you a decent boost.
<< Gainward already markets a Ti 200 chip under the Ti/500 label, so the naming is consistent to them. >>
Am I the only one that's bothered by this?
It strikes me as mis-leading marketing in the same vein as ATi's OEM/Retail clockseepds varying.