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Tom Murphy
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Re: Nvidia's retort
Tom Murphy   7/31/2013 10:51:09 AM
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Rick and Peter raise an interested question:  just what is the tipping point between real performance increase and the cost of going custom?

Peter Clarke
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Re: Nvidia's retort
Peter Clarke   7/31/2013 10:36:48 AM
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yes but is that betraying an emphasis on computational performance.

ARM maybe putting out lots of cores and POPs but maybe 15 percent better power efficiency justifies going custom?

rick merritt
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Nvidia's retort
rick merritt   7/31/2013 10:22:52 AM
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In the past, Nvidia defended itself saying Qcomm did not get significant performance benefits from the work of doing a custom core design (less than a 15% boost they claimed). They also argued ARM is putting out so many cores and interconnects so fast these days there's no real time to market advantage doing it yourself either.

Applied Micro may find the latter point is true by the time it gets out its 64-bit server SoCs.

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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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