The new lineup has quiet operation as its focus with the fan only kicking in when the PSU is under heavy loads.Replacing the company's TX Series the new models are all fully modular, with even the main motherboard connection being removable. They're also all rated at 80 Plus Gold, which means they offer up to 92% (90% for 115V AC) efficiency.Corsair has also confirmed the range is certified to work with Intel's latest Ivy Bridge E and Haswell processors. Some PSUs had problems working with Intel's Haswell CPUs due to their particularly low power states, but not here.Starting at 450W and going all the way up to 1000W the new range covers most practical power requirements for your average PC.The RM Series is also compatible with the Corsair Digital Bridge cable, which can be used to connect to your motherboard or Corsair Link hub and provide real-time monitoring of fan speed and +12V power delivery via Corsair Link software. The Digital Bridge is included with the 1000W unit and an optional extra for the other models.Prices start at around £80 for the 450W unit and top out at around £150 for the 1000W model, including a 5-year limited warranty. The range is available to buy now, with the likes of Overclockers and Scan stocking the full range.