be quiet! Straight Power E9 CM 480 W
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 | Row 3 - Cell 1 | Row 3 - Cell 2 | Row 3 - Cell 3 | Row 3 - Cell 4 | Row 3 - Cell 5 | 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 |