Express units use Analog Devices SHARC ADSP-21161 DSPs running at approx. 100MHz. These DSPs also feature the Single Instruction Multiple Data (SIMD) architecture which can effectively double their processing power for certain modules (e.g. stereo EQs). Each Express unit has two of these DSPs. The two DSPs can deliver a theoretical maximum combined total of 1180 MFLOPS (Mega Floating Point Operations Per Second).