The main reason for the ETA-10's speed was the use of a liquid nitrogen cooling in some models to cool the logic components. Even though it was based on then-current CMOS technologies, the cooling allowed the CPUs to operate on a ~7ns cycle, so a fully loaded ETA-10 was capable of about 9.1 GFLOPS. The design goal had been 10 GFLOPS, so the design was technically a failure. Two LN2-cooled models were designated ETA-10E and ETA-10G. Two slower, lower-cost air-cooled versions, the ETA-10Q and ETA-10P (code named "Piper") were also marketed.