The Corsair RM650 is fully modular and optimized for silence and high efficiency. Its built with low-noise capacitors and transformers, and Zero RPM Fan Mode ensures that the fan doesnt even spin until the power supply is under heavy load. And with a fan thats custom-designed for low noise operation, its whisper-quiet even when its pushed hard. 80 PLUS Gold rated efficiency saves you money on your power bill, and the low-profile black cables are fully modular, so you can enjoy fast, neat builds. And, like all Corsair power supplies, the RM650 is built with high-quality components and is guaranteed to deliver clean, stable, continuous power. Want even more? Connect it to your Corsair Link system (available separately) and you can even monitor fan speed and +12V current directly from your desktop.