Yep and the spec is apparently 600mhz, but the power to get the chip to push polys is the issue. Watching Quake 3 play with bots on the N900 with sound and no sign of lag at least tells me the N900 can at least perform practically for stuff that needs it

I think it is fair to say that the 3430 is a more balanced chipset solution for "phones" when considering power consumption and graphics balance.