Reviews - be-quiet Straight Power E8-400W
Sample Provided by: be-quiet (By jonny on Thu, Jul-14-2011)

Page 1 - Product overview

Today's unit comes to us from the German company Listan GmbH & Co. Listan's products are generally found all over Europe, as well as shops in Taiwan. Listan is best known by their brand names, "Revoltec" and "be-quiet". Revoltec is best known for chassis and lighting. be-quiet is the brand we see a number of cooling solutions and power supplies under. The Straight Power (E8) line of power supplies consist of a 400W, 450W, 500W, 550W, 600W and 700W. I'm going to be reviewing the lowest wattage unit from this product line: the BQT E8-400W.

The front of the box is quite basic, showing us a shot of the product, a few marketing bullet-points and an 80 Plus Bronze logo.

It is the back of the box that has the bulk of useful information. Let's have a close up look at the English text on the box:

This Straight Power information looks pretty Straight Forward. The fan used in the unit is one of be-quiet's SilentWings fans, which are somewhat unique than other power supply fans due to the fan blade design and the fluid dynamic bearing. Moving along, we also see that they list that this unit has the +12V rail split up into three independent +12V rails. Also here, we see that Listan claims that this unit not only meets 80 Plus Bronze standards, but can be as efficient as 89%. For the record, 80 Plus Bronze means this power supply is at least 82% efficient at 20% load, 85% efficient at 50% load and 82% efficient at 100% load.

If we have a look at the far left side of the back of the box, we see a diagram showing the cables, their lengths and the connectors. The cables are a very typical 550mm in length to the first connector, and then 150mm to each additional connector after that. The cables for drives and peripherals mix SATA, Molex and floppy power connectors together on the same cable. That can be good or bad depending on your system's configuration. Also, we see that this unit only has one PCIe power connector. Technically, this power supply could support a graphics card that requires two PCIe power connectors, so it's a little disappointing that we don't get two of the connectors here. On the other hand, it could be relatively easy to overload a 400W power supply if you were to require two PCIe power connectors depending on your system's total configuration and power requirements. It's just nice to have the option there if you need it and you're smart enough not to blame the power supply when you under estimate your computer's power requirements and your PC shuts down.

I've reproduced the cable chart in our format below:

BQT E8-400W
Type of connector:

20+4-pin ATX connector (550mm)


4+4-pin ATX12V/EPS12V (550mm)


8-pin ATX12V/EPS12V (550mm)

6-pin PCIe (570mm)

6+2-pin PCIe (600mm)


SATA (2 cable w/ 2 connectors) (550mm+150mm)

5.25" Peripheral Power Connector (2 connectors on same 2 cables as SATA) (+150mm+150mm)

3.5" Drive power adapter (at the end of each SATA cable) (+150mm)

Unit Dimensions(L x W x H)
160mm x 150mm x 86mm

Also notice that the DC output table shows the three +12V rails as having an 18A OCP on each. We'll test to see where that OCP is actually set when we do our load tests.  Below is the DC output table reproduced in our usual format:

BQT E8-400W













Max Power







As we open the box, we see the power supply protected within the center of the box between bubble wrap and cardboard spacers.

We also have two manuals: One for the power supply and one for the SilentWings fan.

Because this unit shipped to us from Germany, a European power cord was included with the unit. Also included was a pack of four mounting screws and four Zip-ties.

The unit itself has a very unique look. Instead of a metal grill screwed to the housing, be-quiet uses black-chrome finished metal rods to protect the fan from fingers (or fingers from fans).

The way the rods are fastened to the housing really make me want to open the unit up and check out how they're mounted. Also check out how hex head screws are used to hold the PSU together. Another nice aesthetic touch are the slightly curved edges.

The inside side of the unit has a small honeycomb grill along the PCB level of the unit. Also notice the subtle orange trim coming from in between the intake fan and the housing. I really like the attention to detail the aesthetics are given on this unit.

The exhaust side of the Straight Power looks pretty typical with it's honeycomb exhaust grill.

If you have a case where the power supply mounts to the bottom of the chassis, you will get to see a debossed "be-quiet" logo on your power supply.

The Straight Power 400W comes with two Velcro straps. The 24-pin, two CPU power connectors and PCIe connector cables come tied up in one of the straps out of the box, while the other strap ties up the peripheral and SATA power connectors.

Let's untie these cables and plug this power supply into the load tester and see how it performs.


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