Re: OT: IA64's speed beaten by orders of magnitude...

JF Mezei wrote:
Doug Phillips wrote:
Seems the Georgia Tech article has given away most of the secrets;
(Also see link posted by Richard Brodie)

< http://gtresearchnews.gatech.edu/newsrelease/half-terahertz.htm >

Thanks for the pointer.

I can just see a new burgeonning industry: liquid helium delivered to
homes so that the teenagers can boost the speed of their PC to play
faster games :-)

What I find most significant is that they are able to run that chip at
350ghz at room temperature. What is not said however is whether that
chip had samples from all the building blocks of a CPU (OR, XOR, AND,
NAND (are there others I forgot ?))


Of you can only implement "AND" at that speed, then it isn't very useful
for building CPUs.


Silicon-germanium is fast, but expensive. And, just because a
transistor *can* switch at 350Ghz doesn't mean that any CPU built from
SiGe will run at that speed. Cell phones are a big SiGe user now, I
think.

The logic gate switching time would be relative to (among other things)
the number of components in series, but each like transistor would have
the same speed. What I get from the article is that they were measuring
transistor switching speed.

Maybe one of the chip guys will jump in and explain it better.

.

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