[Hardware] The market of ASICs (One GigaKey / Second?)

david fleischer cilantro_il at yahoo.com
Wed Aug 11 01:13:35 EDT 2004


--- jbass at dmsd.com wrote:

> Anybody know what happens to an FPGA's performance
> if you cool it down
> to 10K?
> 
> John

It gets faster... by how much? the thresholds of the
transistors go down by about 1 mV for each 3deg, if i
remember correctly. This makes them switch faster,
until all of the delay is caused not by the switching
but by the routing (in an FPGA this dominates).

But what does this matter? The increase in rate will
come from the system design and parallelism. 
As a case in point, you may be able to overclock at
450MHz instead of 300Mhz, but designing the key tester
correctly will yield a much greater beneftit than
bathing it in liquid helium.

david



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