Equation 3 · Part 1 · An Optical Fabric Turns Off-Package Memory Into an Extension of the Die
Symbol B
What this part means
B is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Its job in the formula
B is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol B→Article meaning
The passage around this formula
Here BW is realized, measured random-access bandwidth in bytes per second — not a marketing peak, not a sequential-streaming figure, since random access is what most large-model inference and any pooled-memory workload actually demands — and P is the power, in watts, that a system actually draws to sustain that bandwidth, attributable specifically to the memory-and-fabric subsystem rather than the whole machine. An index above 1 means the optical, unified case delivers more usable bandwidth per unit of energy than wiring the same total capacity to the die’s edge the ordinary way — a real, measurable locality gain, not just a capacity or reach gain. An index at or below 1, once the fabric’s…
Learn the underlying idea
A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.
Open the illustrated variables: a letter stands for a value guide →
See this notation across published equations →
The article lists its research sources here.