Here's a quick overview:
Toughpower Cable Management QFan:
Available in 500W, 650W, 750W, 850W and 1000W 140mm fan Powerful +12V rails (combined loading of 36A(500W) 52A(650W) 60A(750W) 62A(850W) 72A(1000W)). Smart fan control function: after PC shuts down, cooling fan keeps running till the temp. under 45°CC to effectively cool down parts inside PSU.
Toughpower ESA 850W:
850W Support for NVIDIA ESA technology to monitor fan speed, current, voltage and temperature Four +12V rails, combined load of 62A
TR2 900W/1000W:
900W and 1000W Four +12V rails: 70A on 900W model and 75A on 1000W
TR2 QFan:
Available in 300W, 350W, 400W, 450W and 500W +80% efficiency 140mm fan