Turbo Mode
is not used to calculate Theoretical Peak Performance
, you have to consider something like:
CPU speed = 2.9 GHz
CPU Cores = 8
CPU instruction per cycle = 8 (considering AVX-256 -> 256 bits unit, can hold 8 single precision values) x 2 (add and mul operations like you said) = 16
Putting all together:
2.9x8x16 = 371 GFlops/s