Smart Wizard
Get a complete build plan based on budget and goals.
Build Comparison
Compare complete builds side by side.
Part Comparison
Check specs, price, and value across parts.
Bottleneck Calculator
Measure CPU and GPU balance before you buy.
Power Calculator
Estimate wattage and PSU headroom.
Will It Run?
Test your hardware against popular games.
Smart Wizard
Get a complete build plan based on budget and goals.
Build Comparison
Compare complete builds side by side.
Part Comparison
Check specs, price, and value across parts.
Bottleneck Calculator
Measure CPU and GPU balance before you buy.
Power Calculator
Estimate wattage and PSU headroom.
Will It Run?
Test your hardware against popular games.
Smart Wizard
Get a complete build plan based on budget and goals.
Build Comparison
Compare complete builds side by side.
Part Comparison
Check specs, price, and value across parts.
Bottleneck Calculator
Measure CPU and GPU balance before you buy.
Power Calculator
Estimate wattage and PSU headroom.
Will It Run?
Test your hardware against popular games.
be quiet!
Pricing is still being verified
About This Product
The be quiet! STRAIGHT POWER E9 400W is an 80 PLUS Gold certified non-modular ATX power supply. It provides efficient and quiet power delivery suitable for entry-level to mid-range systems that do not require high wattage or extensive cable management. This unit is a good option for users building a basic office PC or a light gaming rig with a single GPU drawing under 200W.
Verdict
“Ideal for quiet, efficient, and basic PC builds not requiring high power or modularity.”
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