KELLY 1

• Single, straightforward processor taking roughly 5 cycles per FLOP

• Memory system capable of providing two floating-point operands, and storing one, every 5 cycles

• Standard off-the-shelf optimising compiler

• Achieves close to peak performance on most problems

• Clock rate 500GHz, clock cycle time = $1/(5 \times 10^{11}) = 2{\rm ps}$ (picoseconds)

  Requires logic gates and wiring with propagation delays around 0.1-0.2 ps (in this time light travels about $30\mu {\rm m}$).