Vylsith said:
Except that the benefit you get from overclocking is hardly a 1:1 ratio. It's much lower. They'll never be able to make their GPU more powerful than the one in the PS4. Ever. It would catch fire before it could push out that many TFlops.
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With CPU's, that's true, due to the serialised nature of the processors, graphics cards, provided they don't run into any other bottlenecks from the likes of Memory bandwidth and such... Can actually achieve almost linear increases in performance.
For example, you would be surprised how many people have taken a Radeon 7770 and overclocked it to 1.2ghz, giving it a theoretical 1.53 Teraflops, the MSI's with the voltage adjustments do surprisingly well.
No fires, smoke or anything.
Still doesn't touch a PS4's GPU however, but it does close the gap to the point where it's really no big deal. - Not that Microsoft would *ever* push for those kinds of clocks, they didn't over-engineer the Xbox One's cooling and power delivery THAT much.
Vylsith said:
eSRAM runs really hot and DDR3 runs much hotter than GDDR5.
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DDR3 in general actually uses less power than GDDR5.
However, GDDR5 would use less power at the same clockspeed.
Also keep in mind GDDR5 requires a much more complex memory controller than what the very mature and in comparison... Simple DDR3 would require, which would add to cost, heat and power consumption, how much? No idea, but nVidia and AMD put allot of effort (And die space) into their GPU memory controllers.