Here we go
http://www.asus.com/products/vga/v9520m/overview.htm
This is an overview of the Asus 9520 FX Video cards.It does say 128 bit and 400mhz memory. Facts are the memory doesn't go that high as it is 6nanoseconds memory chips that would make the memory 333mhz not 400.
But in all the adds they say 400 mem and 128bit thats why I bought one and I'm pissed aswell