Hash rate: 3.5t±10% power at wall 1100w(power efficiency 90%)? quantity of chips 80 power connector 4x 6pin, all 4 connectors required when running temperature max operating ambiant air temp 38? controller raspberry pi(version 1, b, b+), ? each raspberry pi can control 10 units protection the machine will not start when the fan is damaged ? dimension 136×150×334mm weight 4.8kg power supply 1200w gold power supply recommended a raspberry pi controller is needed for this machine to function. Raspberry pi, version b or b+ (rpi 2 is not yet supported) each rpi can control 50+ miners (we can sell rpi kits for $75) communication interface: iici2c working environment: 0c to 35c, 10% to 80% relative humidity, non-condensing transport storage environment: -15c to 40c, 10% to 90% relative humidity dimensions: 354mm x 130mm x 150mm weight: 4.3kg performance variance: ± 5% variance possible on quoted performance statistics'