Half a century later, ENIAC was reconstructed on a 7.4 × 5.3 mm silicon microchip that contained 174,569 transistors: their total was ten times larger than the original count for vacuum tubes because the transistors also replaced all resistors, capacitors, and other components (Van der Spiegel et al. 2000). ENIAC was more than 5 million times heavier, it consumed about 40,000 more electricity but its speed was no more than 0.002% that of the reconstructed processor (100 kHz vs. 50 Mhz), all of it thanks to solid-state electronics and its continuous advances.
