The heat in which a graphics card produces has a lot to do with the way you design it. When you're saying 300mhz can't be produced on a 50-60+ million transitor chip on a .15 micron, you're thinking in terms of Nvidia. ATI chips in general run a lot cooler than Nvidia's simply by design. Take the Radeon for example. They took the same R100 core and made the "RadeonSE", or at least that's what we call it, and made it run cooler with an updated stepping. (Though I haven't a clue exactly how they did it.) AMD does it. Intel does it. Nvidia does it. 3dfx *did* it. It's not uncommon for companies to do this, but hey, we're getting the benefit from it anyways, so no complaints here.

(Now, let's all not jump to conclusions on how fast the R2 will be. There's no official statement yet, though if you take a close look at Newegg's advertised R2 and you'll see a fillrate of 2.6 gigatexels. Divide that by 8 and do the math guys. I think that'd be pretty b@d@***...)

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T-Bird 1200/200
384mb PC-133 RAM
ATi Radeon 64mb
Windows 2000 Professional