[grogi]

Thermaltake Purepower RX 500W & 600W
"...On today's test bed we have two mid-range power supplies from Thermaltake: Purepower RX 500W and 600W -- both featuring cable management system. Knowing Thermaltake, these will perform marvelously."

Mushkin HP-580 AP
"Advanced Thermal & Acoustic Design: Automatically varies the PSU fan speed depending on the system load and temperature, allowing for the most stable and quiet computing environment no matter what programs are running.
RailFusion: Responds to increased loads by automatically combining the +12V rails, providing ample power for mulit-GPU systems
Power Conditioning: Provides ultra-low ripple (1%) and superior voltage regulation (1%) under all load levels
QuadRail: Provides four independent +12V rails for balanced power distribution
VersaPlug: Allows for an organized case and improves airflow by using only the required cables. Compatible with ATX, ATX12V, EPS, and BTX standards (20/24-pin ATX, 4/8-pin +12V). Includes two PCIe cables for multi-GPU systems and eight SATA power connectors.
High Efficiency
Active PFC"

Zalman ZM500-HP PSU on XSReviews.
"Zalman have always been at the forefront of silent computing with their CNPS mark; accreditation for the quietest components. Today I have one of their modular power supplies, the ZM500-HP, which features a heatpipe fed heatsink."