Our German team tested be quiet's Straight Power E9 CM 580 W in a previous round-up. That's this unit's bigger brother. The company claims that they're both the quietest models it sells. Although you can't buy the Straight Power here in the U.S., we're using it as a control, since its 480 W rating sits right between Seasonic's 460 W and SilverStone's 500 W specifications.
As far as specs go, be quiet's 480 W offering is only slightly different from its 580 W effort. It employs four +12 V rails, each supplying up to 18 A, and a modular cabling system with long, sleeved power cords. The number of receptacles on the power supply is more than ample for the systems a 480 W PSU might drive. In fact, it includes enough connectors for up to two graphics cards in SLI or CrossFire.
|be quiet! Straight Power E9 CM 480 W|
|AC Input||100-240 V, 50-60 Hz|
|DC Output||+3.3 V||+5 V||+12 V (#1)||+12 V (#2)||+12 V (#3)||+12 V (#4)||-12 V||+5 Vsb|
|24 A||22 A||18 A||18 A||18 A||18 A||0.3 A||3.0 A|
|Individual Output||15 W||3.6 W|
|Rail Utilization||Sys||Sys||CPU And VGA|
|Combined Output||130 W||456 W|
|Total Continuous Output||480 W|
|Peak Output||550 W|
- Two Fanless Power Supplies, Compared
- be quiet! Straight Power E9 CM 480 W
- Measurements: be quiet! Straight Power E9 CM 480 W
- Seasonic X-460 460 W
- Measurements: Seasonic X-460
- SilverStone SST-ST50NF
- Measurements: SilverStone SST-ST50NF
- Test Setup, Hold-Up Time, Inrush Current, Peak Load, And Short Circuit Protection Test
- Efficiency According To The 80 PLUS Spec, Temperature, And Standby Power
- Efficiency Across The Power Spectrum
- Which Fanless PSU Is Right For You?