Question 1

What is the best power supply under $400?

Accepted Answer

Based on our value scoring system (cost per watt adjusted for efficiency and connectors), the best PSU under $400 is the EVGA 600 BA (600W, rated 80+ Bronze).

Question 2

Should I buy a cheap PSU for a gaming PC?

Accepted Answer

Never skimp on the power supply. While staying under $400 is fine for budget-to-mid builds, always ensure the unit is certified (80+ Bronze/Gold) and ATX 3.0/3.1 compliant to protect against transient voltage spikes.

Question 3

What can I expect from a PSU under $400?

Accepted Answer

PSUs under $400 typically offer 80+ Bronze or Gold efficiency, wattage ratings from 550W to 850W, and semi-modular or non-modular cable designs. Many budget units still provide reliable OCP, OVP, and SCP protections.

Question 4

Is an 80+ Bronze PSU under $400 good enough?

Accepted Answer

Yes. 80+ Bronze (82-85% efficiency) is adequate for budget and mid-range builds. The efficiency difference between Bronze and Gold saves about $8-15 per year on electricity for a typical gaming PC — often less than the price premium for a Gold unit.

Question 5

How reliable are power supplies under $400?

Accepted Answer

Quality varies significantly. Stick to known brands like Corsair, EVGA, Seasonic, be quiet!, Cooler Master, MSI, and NZXT. Check our quality tier ratings on each PSU card. Units rated Tier B or higher are recommended for long-term reliability.

Question 6

Should I buy a PSU at the top of my budget or save money?

Accepted Answer

For PSUs under $400, spending more typically gets you higher wattage, better efficiency, and modular cables. If your build demands are modest (550-650W), a mid-price unit is fine. For future upgrade flexibility, spend closer to the $400 limit.

Question 7

Do cheap PSUs support modern GPU connectors?

Accepted Answer

Most PSUs under $400 do not have native 12V-2x6 connectors — that feature is reserved for premium units. If your GPU requires 12V-2x6, you will need an adapter or a higher budget. Check the connector match indicator on each PSU card.

Question 8

What wattage PSU should I look for under $400?

Accepted Answer

Available wattages under $400 range from 500W to 1500W. Choose based on your GPU's minimum requirement plus 20% headroom for transient spikes.

Question 9

How does the value score work for PSUs under $400?

Accepted Answer

Our value score factors in cost-per-watt, efficiency tier, modularity, warranty length, and connector compatibility. Units with higher value scores deliver the best combination of price, features, and build quality in the sub-$400 range.

Best PSUs Under $400

EVGA 600 BA

Thermaltake Smart 500W

Corsair CV650

EVGA SuperNOVA 650 G6

Corsair RM750x (2024)

MSI MAG A850GL PCIE5

Fractal Design Ion Gold 850W

Thermaltake Toughpower GF3 850W

NZXT C850 Gold

be quiet! Pure Power 12 M 750W

Seasonic FOCUS GX-750

Seasonic FOCUS GX-650

Corsair RM850x (2024)

Thermaltake Toughpower GF3 1000W

ASUS TUF Gaming 850G

EVGA SuperNOVA 850 G7

Seasonic FOCUS GX-850

EVGA SuperNOVA 1000 G7

MSI MPG A1000G PCIE5

NZXT C1200 Gold

Cooler Master V850 SFX Gold

Corsair RM1000x (2024)

ASUS ROG Strix 1000G

SilverStone HELA 850R Platinum

be quiet! Straight Power 12 750W

be quiet! Straight Power 12 850W

Corsair HX1200i

Corsair SF750 Platinum

Seasonic PRIME PX-850

Corsair HX1500i

MSI MEG Ai1300P PCIE5

be quiet! Dark Power Pro 13 850W

Seasonic PRIME TX-1000

be quiet! Dark Power Pro 13 1000W

Browse Other Budget Ranges

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