BitFenix today introduced the Whisper M line of premium modular power supplies (PSUs). Available in capacities of 850W, 750W, 650W, 550W, and 450W, these PSUs feature a design focus on low fan noise, with the 135 mm fan spinning at less than 500 rpm at loads of up to 70%. The units feature fully modular cabling; with the 850W and 750W models featuring six PCIe power connectors, 650W model featuring four, and 550W and 450W featuring two. The 850W and 750W further feature two 4+4 pin EPS connectors, making them ideal for dual-socket workstations.Under the hood, the Whisper M features a multi +12V rail design with 80 Plus Gold switching efficiency, DC-to-DC switching, active PFC, ripple and noise reduction circuits, most common electrical protections (over/under voltage, overload, overcurrent, AC input surge, thermal-trip, and short-circuit protection), and ATX 12V v2.4 compliance for the latest generation processors. The Whisper M Series come with 7-year warranties. The company didn't reveal pricing.