Overclock.net › Components › Power Supplies › be quiet! STRAIGHT POWER E9 400W

be quiet! STRAIGHT POWER E9 400W

100% Positive Reviews
Rated #65 in Power Supplies

Posted

Pros: ultra silent, up to 92.9% efficiency

Cons: no cable management, availability

About
be quiet! power supplies are German product conception and design manufactured by Fortron. What you will find in these PSUs is basically a be quiet! Silent Wings fan and high quality/efficiency power conversion technology.

Review
The be quiet! Straight Power E9 400 W is a non modular 80Plus Gold certified PSU with up to 92.9% power conversion efficiency. Its Silent Wings fan is a 135 mm fan with a temperature dependent max. speed of 800 rpm. It has a PCI-E 6 pin and a PCI-E 6+2 pin connector which makes it possible to run almost any contemporary single GPU system with the E9 400 W.

Conclusion
That said you will be able to run a high gaming rig and also maintain most efficient idle power consumption. At low loads of about 15% or less the efficiency of a PSU drops significantly. By running a PSU with a low rating e.g. 400 W that 15% threshold is at 60 W. Do the math what happens when you run a 800 W PSU and your PC actually needs just 60 W at idle operation! You pay more to purchase a higher rated 800 W PSU and at the same time you may increase your electric bill.

I bought the be quiet! Straight Power E9 400W because it's ultra silent, highly efficient and it's all I need to run and overclock an i5-2500K and a GeForce GTX 670.

Pros
  • ultra silent (135 mm fan, temperature dependent max. speed of 800 rpm)
  • high efficiencies (load & idle)
  • inexpensive (60 € purchase price)
  • sleeved cables
  • can run GPUs with a PCI-E 6 pin + PCI-E 6+2 pin connector

Cons
  • no cable management
  • availability limited to Europe (distribution in the USA has been announced)
be quiet! STRAIGHT POWER E9 400W
Description:

The Straight Power® E9 400W CM provides best-in-class performance for systems that demand whisper-quiet operation without the slightest compromise in power quality. The many premium features our German team has designed into this power supply make the E9 400W a ‘Best Choice’ for new systems and as a replacement in existing systems.

Details:
DetailValue
Models:
Model Name/TypeMPNEAN/UPC
Overclock.net › Components › Power Supplies › be quiet! STRAIGHT POWER E9 400W