SeaSonic · psu
SeaSonic X Fanless 400W 80+ Gold Certified Fully Modular ATX
400 W · gold · modularused in 20 published build(s)
Replacements for the PSU
8- Cougar GEX X2 Black 1000W Fully Modular 80+ Gold Certifiedsame slot, strictly betterFits the buildUpgrades
- Zalman TeraMax II ATX 1200W Fully Modular 80+ Gold Certifiedsame slot, strictly betterFits the buildUpgrades
- SeaSonic ATX3-FOCUS-GX White 850W Fully Modular 80+ Goldsame slot, strictly betterFits the buildUpgrades
- FSP Group AU-400FL Fanless ATX 400W Semi-Modular 80+ Goldinterchangeable substitute in the same slotFits the buildAlternatives
- Corsair RM450 450W Fully Modular 80+ Goldinterchangeable substitute in the same slotFits the buildAlternatives
be quiet! Straight Power 11 ATX 450W Fully Modular 80+ Gold Certifiedinterchangeable substitute in the same slotFits the buildAlternatives- Thermaltake Toughpower DPS G 450W Fully Modular 80+ Gold Certifiedinterchangeable substitute in the same slotFits the buildAlternatives
Wattage
400 W
Efficiency
80+ gold
Modular
full
Form factor
ATX
Neighbourhood
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Specifications
Catalog data
Source: OpenDB- Length
- 160 mm
- Fanless
- Yes
- Modular
- Full
- Wattage
- 400 W
- Connectors · SATA
- 6
- Connectors · Eps 8 pin
- 1
- Connectors · Atx 24 pin
- 1
- Connectors · Molex 4 pin
- 5
- Connectors · PCIe 6 plus 2 pin
- 2
- Form factor
- ATX
- Efficiency rating
- 80+ Gold
Builds that use it
20- Intel Core Ultra 5 250KF Plus · Intel B860 · Fanless PSU · 16GB DDR5 buildBuild yourself — for comparison≈ €744
- Intel Core i3-14100 · Intel B760 · Fanless PSU · 16GB DDR4 · 20TB HDD buildSmart build — best all-round≈ €983
- AMD Ryzen 5 5600GT · AMD B550 · Fanless PSU · 16GB DDR4 · 20TB HDD buildSmart build — best all-round≈ €1,096
- Intel Core Ultra 5 225 · Intel B860 · Fanless PSU · 32GB DDR5 · 2TB NVMe + 2TB HDD buildSmart build — best all-round≈ €1,111
- Intel Core Ultra 5 225 · Intel B860 · Fanless PSU · 32GB DDR5 · 2TB NVMe + 2TB HDD buildSmart build — best all-round≈ €1,155
- Intel Core Ultra 5 225 · Intel B860 · Fanless PSU · 32GB DDR5 · 2TB NVMe + 2TB HDD buildSmart build — best all-round≈ €1,170
Check compatibility
Pick any other component — live kernel verdict · Base: SeaSonic X Fanless 400W 80+ Gold Certified Fully Modular ATX
Alternatives
4- FSP Group AU-400FL Fanless ATX 400W Semi-Modular 80+ GoldFSP Group · psu — interchangeable substitute in the same slot
- Corsair RM450 450W Fully Modular 80+ GoldCorsair · psu — interchangeable substitute in the same slot
- be quiet! Straight Power 11 ATX 450W Fully Modular 80+ Gold Certifiedbe quiet! · psu — interchangeable substitute in the same slot
- Thermaltake Toughpower DPS G 450W Fully Modular 80+ Gold CertifiedThermaltake · psu — interchangeable substitute in the same slot
Upgrades
4- Zalman TeraMax II ATX 1200W Fully Modular 80+ Gold CertifiedZalman · psu — same slot, strictly better