Actually we don't know nothing about clock speeds or anything, the 729.14Mhz could be... but maybe it isn't. GPU architecture... we don't know either. Being a 90nm process could easily throw in something like a Radeon9800, but we don't know either.
The only thing known is the VRAM, being 64MB GDDR3 on a 128bit bus... you can actually know this by only looking at the numbers on the memory cell. But the speed... we don't know either.







