Unpowered circuitry due to thermal power constraints
In the electronics industry, dark silicon is the amount of circuitry of an integrated circuit that cannot be powered-on at the nominal operating voltage for a given thermal design power (TDP) constraint.
Dennard scaling would posit that as transistors get smaller, they become more efficient in proportion to the increase in number for a given area, but this scaling has broken down in recent years, meaning that increases in the efficiency of smaller transistors are not proportionate with the increase in their number. This discontinuation of scaling has led to sharp increases in power density that hamper powering-on all transistors simultaneously while keeping temperatures in a safe operating range.[1]
As of 2011, researchers from different groups have projected that, at 8 nm technology nodes, the amount of dark silicon may reach up to 50–80%[2] depending upon the processor architecture, cooling technology, and application workloads. Dark silicon may be unavoidable even in server workloads with abundance of inherent client request-level parallelism.[3]
^Taylor, Michael B. (June 2012). "Is dark silicon useful? Harnessing the four horsemen of the coming dark silicon apocalypse". DAC Design Automation Conference 2012: 1131–1136.
^Esmaeilzadeh, Hadi; et al. (June 2011). "Dark silicon and the end of multicore scaling" (PDF). 2011 38th Annual International Symposium on Computer Architecture (ISCA): 365–376.
In the electronics industry, darksilicon is the amount of circuitry of an integrated circuit that cannot be powered-on at the nominal operating voltage...
violating power constraints. The remaining (inactive) area is referred to as darksilicon. McMenamin, Adrian (April 15, 2013). "The end of Dennard scaling". Retrieved...
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