Author: Shiuming Lai (cache-ink1-cro-hsi.cableinet.co.uk)
Date: 11-04-2002 13:17
CENTBENCH. When that program shows "impossible" DSP clock speeds, your CT2 needs reprogramming because it has outdated and bugged ISP code. Cooling the chips won't automatically make them work faster (perhaps only marginally due to lower electrical resistance in the internal interconnects, not that you'd notice at this scale) but allows you to clock them higher because the thermal dissipation from increased power consumption is accelerated, thus avoiding danger of meltdown. The big problems come from the PCB layout, which simply may not scale as well as the chips. Signal stability may be seriously compromised because you effectively have a radio transmitter with all those signals jumping up and down at such a rate, not to mention clock skew (keeping signals in sync. with ever smaller clock periods is a problem - all lines on a bus may not latch in the same clock when you push it beyond a point)
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