Not everytime it is easy to buy a best 400w power supply. You can get confused easily seeing the availibility of huge best 400w power supply by different manufacturers in the market. They are so similar in terms of performance, quality, longevity, and overall user experience that choosing a final buying decision may be tough. All you need at that point is a comprehensive buying guide to help you find the ideal best 400w power supply for your needs.
In this helpful essay, we’ll go over a few things you should think about before purchasing a best 400w power supply. You can call it a proper review guideline for you which will cover pros and cons of your desired product including its sustainability, affordability, functions, and also practical benefits. One more thing will be there which is a solid comparison among few similar products. As a result, you’ll be able to quickly select the best option for your needs. Let’s look inside.
At a Glance
![]() | Coolmax I-400 400W ATX 12V V2.0 Power Supply (not Compatible with PCI-E) | Buy Now |
![]() | EVGA 100-N1-0400-L1 , 400 N1, 400W, 2 Year Warranty, Power Supply 100-N1-0400-L1 | Buy Now |
![]() | APEVIA VENUS450W 450W ATX Power Supply with Auto-Thermally Controlled 120mm Fan, 115/230V Switch, All Protections | Buy Now |
![]() | Mackertop 400W Power Supply PSU Compatible with HP 280 288 480 600 800 G3 G4 942332-001 PA-3401-1HA | Buy Now |
![]() | APEVIA SFX-AP400W Mini ITX Solution / Micro ATX / SFX 400W Power Supply | Buy Now |
![]() | Rextin Switching Power Supply12V 400W 33A Regulated Transformer Led Driver SW for LED Strip Lights (400W) | Buy Now |
![]() | inShareplus 24V 16.5A 400W Universal Regulated Switching Power Supply, 100-240V AC to DC 24 Volt LED Driver, Converter, Transformer, Adapter for LED Strip Light, CCTV, Computer Project, 3D Printer etc | Buy Now |
![]() | Chengliang Power Supply Dc 24v 17a 400w Original Ender 3 3D Printer Switching PSU UL Certified | Buy Now |
![]() | LightingWill LED Driver 400 Watts Waterproof IP67 Power Supply Transformer, 90-140V AC to 24V DC Low Voltage Output, Adapter with 3-Prong Plug 3.3 Feet Cable for Outdoor Use, Computer Project | Buy Now |
![]() | Xunba 12V 24V 40V Switching Power Supply Driver 400-500 W for CCTV Camera LED Strip AC 100-240V Input to DC 12-24-40V Small Size (SS500-24) | Buy Now |
Top 10 reviews best 400w power supply’s
We sought to estimate the 10 best best 400w power supply from hundreds of items in this sector. This list will make you feel confident in your ability to obtain your chosen best 400w power supply in a matter of minutes. We focused on their use, performance, durability, appearance, price, and previous user experiences. We are confident that this top 10 best 400w power supply list will assist you in selecting the perfect one that matches your needs.
Coolmax I-400 400W ATX 12V V2.0 Power Supply (not Compatible with PCI-E)

- ATX12V version 2.0
- Single +12V output design
- Serial ATA 150 ready
- Total Power: 400 W. Input- 100 ~ 132V AC / 200 ~ 264V AC
- Connector: 1x 20+4-pin Main Connector; 1x?P4 Mainboard Power Connector; 2x 15-pin SATA Connectors; 3x Peripheral Connectors; 1x 4-pin Floppy Connector
- Cooling System: 1x 80mm Low Noise Cooling Fan
EVGA 100-N1-0400-L1 , 400 N1, 400W, 2 Year Warranty, Power Supply 100-N1-0400-L1

- EVGA 400W N1 series
- Fan Size/Bearing: 120 millimeter sleeve bearing – Quiet and intelligent auto fan for near-silent operation
- Heavy-duty protections including OVP, OPP, and SCP
- 2 year & EVGA’s 24/7 technical support
APEVIA VENUS450W 450W ATX Power Supply with Auto-Thermally Controlled 120mm Fan, 115/230V Switch, All Protections

- Apevia Venus 450W ATX Power Supply
- Connectors:1 x 20/24pin Main Power, 1 x 4pin 12V, 3 x SATA, 3 x Peripheral, 1 x Floppy
- Auto-Thermally Controlled Black 120mm Fan. 115/230V Switch
- 5% Tolerance of 5V, 3.3V & 12V Output
- Short-Circuit/Over-Current/Over-Voltage/Over-Power/Under-Voltage/Over-Temperature Protections
Mackertop 400W Power Supply PSU Compatible with HP 280 288 480 600 800 G3 G4 942332-001 PA-3401-1HA

- Input: 100-240 V, 50-60 Hz,5.2A
- Output: + 12.1Vmain == 16A, + 12.1Vcpu == 16A,+ 12.1VG == 16A,Total power:400W
- Compatible part number: 942332-001 PA-3401-1HA
- Compatible model: For HP 280 288 480 600 800 G3 G4
- Warranty: 12 Month Warranty. Contact us if you have any problems
APEVIA SFX-AP400W Mini ITX Solution / Micro ATX / SFX 400W Power Supply

- APEVIA SFX-AP400W Mini ITX Solution / Micro ATX / SFX 400W Power Supply
- Cooling: 1 x 80mm Automatically Thermal Sensing Fan. All Cables are Sleeved
- Connectors: 1 x 20+4pin Main Power, 1 x 4pin 12V(P4), 1 x 6/8pin PCIe, 2 x SATA, 2 x 4pin Molex, 1 x 4pin Floppy
- Output: +3.3V@12A, +5V@12A, +12V@28A, -12V@0.3A, +5Vsb@2.5A
- Dimension: 125mm x 100mm x 63.5mm (4.92″ x 3.94″ x 2.5″) – L x W x H
Rextin Switching Power Supply12V 400W 33A Regulated Transformer Led Driver SW for LED Strip Lights (400W)

- Led switching power supply 12V 400W transformer driver SW, Input: AC 110V/220V 50/60Hz, Output: 12V 33A 400W
- Smart device surge protection for Short-circuit Protection, Overload Protection, Over Voltage,Over Temperature Protection. High efficiency, High Reliability, Low Temperature Rise
- Certificates: CE/RoHS/FCC Approved
- Warnings: Don’t open or modify the led power supply. Please leave children, kids far away from high voltage power source. Please use it under professional electrician’s guides. Any abuse or improper use will void warranty.
- widely used in LED lighting, Home Appliance, Instrumentation, Office Automation, Telecom, Process and Engineering Industries etc
inShareplus 24V 16.5A 400W Universal Regulated Switching Power Supply, 100-240V AC to DC 24 Volt LED Driver, Converter, Transformer, Adapter for LED Strip Light, CCTV, Computer Project, 3D Printer etc

- Universal Input: 100-240V AC; Output: 24V DC 16.5A
- Widely used in Industrial automation, LED display, CCTV, Radio, Computer Project, LED Strip Lights, 3D Printer etc.
- Protection: Short-Circuit Protection, Overload Protection, Over Voltage Protection, Over-Current Protection, Overheat Protection, Leakage Protection and Under cooling Protection
- Metal Enclosed Body is good for Heat Dissipation which Can Prolong the Lifespan of the Power Supply
- Dual input voltage: AC 110V/220V. There is a switch, choose the proper voltage before use. Please set the switch to 110V for USA.
Chengliang Power Supply Dc 24v 17a 400w Original Ender 3 3D Printer Switching PSU UL Certified

- 24v power supply 24 v regulated universal 24 volt adapter output 24 vdc 17a 400w certified DK-87763-UL
- Power supplies input voltage 100-120/200-240vac by switch convert ac 100-120v/200-240v to dc 24v 17a 400w
- Efficiency over 86% for 3d printer CCTV monitoring led light strip industrial automation communication
- Smart full protections SCP OVP UVP OPP OCP OTP passed UL cooling fan power on auto works Noise≤35dB
- You get one original ender 3d printer power supply CL-P400W24V-D warranty 3 years 24hrs online service
- Withstand 300V AC surge input for 5 seconds
- Withstand 5G vibration shock
- No load power consumption<5W
- 100% full load burn-in test
- Warranty 3 years
LightingWill LED Driver 400 Watts Waterproof IP67 Power Supply Transformer, 90-140V AC to 24V DC Low Voltage Output, Adapter with 3-Prong Plug 3.3 Feet Cable for Outdoor Use, Computer Project

- ✅The Model of LED Driver: Input: 90-140V AC 47/63HZ. Output: 24V DC 16.6A 400W
- ✅Automatic protection for: Short circuit, overload, over voltage, over current, high temperature. Protection type: Hiccup mode, auto-recovery after fault condition is removed
- ✅This 24v power supply with 100% Waterproof IP67 protect for outdoor use. Aluminum alloy metal housing, easy for heat dissipation and ensure stability
- ✅Wide Range of LED power supply: Converts 110V AC to 24V DC, widely use for LED strip lights, LED light bulbs, Outdoor Light and other 24V DC LED lights(≤400W)
- ✅High quality with 1 year warranty, and our seller support team always stand behind our products in any way, so please contact us for replacement if there is any quality proble
Xunba 12V 24V 40V Switching Power Supply Driver 400-500 W for CCTV Camera LED Strip AC 100-240V Input to DC 12-24-40V Small Size (SS500-24)

- Switching Power Supply Driver, Convert 100V-240V include 110V/220V,12V 24V 40V 20A 400W – 500W
- Wide Range Voltage Input 100V – 240V,Over-voltage Protection:115%-135%. Choose 110V/220V before use
- Wide input voltage range, steady and precise output voltage, Shortage Protection,Overload Protection
- Action output cut-off Reset:Auto Reset or fuse, Inteligent device surge protection for While Shortage, Overload, Over Voltage
- Steady Voltage ouput power transformer for electronics, Led Lighting, home appliance etc
Best Best 400W Power Supply Buying Guides
It is impossible for a human being to be well-versed in everything. You can know about some more thing but you cann’t be a jack of all trades. After go through the byuing the guide this time you may being a less fool from more than purchasing best 400w power supply without knowing anything.
You do not have to be an expert on that specific product in order to purchase it. Just focus on a few key points that we will go over in the following sections. Taking those simple considerations into account may make your buying experience more pleasant and straightforward. Let’s move.
Understand Your Needs
Knowing your needs or requirement is the very first thing to discover. If you are not aware of your needs well, then there is a good possibility of buying the wrong products at a wrong time with a good amount of investment. So, first of all and probably most important, we suggest that you take time to consider your necessities for a best 400w power supply. Make a short list of your requirements. This simple activity will assist you in simplifying your purchasing experience. Because, after that you will get to know on what thing you need to give priority and on what you should not.
Budget vs Pricing
Before you go for buying anything, one thing you must think about is budget. Any amount of price can be set for your desired product. That mainly depends on their brand value and different expences like purchasing raw materials, manufacturing, logistics and other operational costs. The higher quality you demand, the higher amount of money you may have to spend for that. That’s why budget matters so much. This fact is true for the best 400w power supply as well.
People says, “Cut your coat, according to your cloth”. First thing you can do is finding out products on internet as per your wishlist. Take a close look at their features and costs.With your deep observation, make a proper comparison among them and select one that you need. At this point, a big question can raise in your mind that do you have good enough money to spent for this best 400w power supply? If yes, then you don’t need to think twice. Just Go for it. You always have the second best option to choose if the answer is “NO”.
Make the Best Brand Selection
Due to our psychological attachments, we are frequently prejudiced towards certain companies. This practice produces positive results at times and negative results at other times. However, there’s no denying that depending on well-known brands is a good idea. Because having enough money in your wallet makes making decisions easy half of the time. But please note that not all brand are necessary for adequate. As a result, you must tread cautiously when deciding whether or not you have picked the appropriate brand for your specific product.
People are divided into two groups. One, who completely rely on a specific brand and the other one doesn’t care about it. All he needs is the right product for the price he is paying. As we don’t have any idea about your typo.But there are few tips which may come adjuvant for both of you at the time of choosing the right brand for the right product.
- Make sure in this case that you are well-versed in the brand.
- What others are saying about this brand.
- What is the average rating for that brand’s specific product?
- Comparison between products of this brand and others.
- Do those features meet your demands?
Take a look on the Features Part
The very first duty of you is to check the features of a best 400w power supply at the time of buying it. By doing so, you will surely get a clear idea about the product. You may percieve then easily that your chosen product is capable enough to fullfill your requirements or not.
This part will help you to identify the differences with others. The attributes can then be compared to similar items. One will gain a better understanding of quality as a result of this work, which will make it easier for us to reach a final decision.
Check the Merits and Disadvantages
Each item has its own set of benefits and drawbacks. Before buying any product it’s your responsibility to check out all things carefully. So be calm and figure out the drawbacks that you expected from this best 400w power supply. Who knows, you may find your perfect product which is made by another company. Just don’t be too lazy to compare your options with theirs before making your final decision.
The section of Pros and Cons can be found on the majority of websites. Carefully go through that part. If you have any further questions, simply contact them via email or phone to seek their assistance.
Quality & Durability
Color, Style, Performance, Materials, and, most importantly, Durability are all aspects of quality. Before making a purchase, you must consider the facts about ensuring quality. In the end, this is the most desired thing that you are paying for. Do you think that you are going to do a good investment against the best 400w power supply you will get? It completely depends on the quality that you are going to experience.
Know About Warranty and Return Policies
Products are produced by every producers. Many of them ensures the higher quality as well. To attract buyers like us, they make creative advertise too. Nothing found wrong yet. But then arrives the matter of Warranty and After Sales Service. That one thing is quite able to make big difference and it’s a big deal indeed.
Warranty, gurantee and return policies are those facts which you should never ignore even by mistake. Even after buying the best quality product with the highest amount of price, anything can happen. Nothing is guaranteed to last forever. But a minimum return of value you can expect from the best 400w power supply you are going to pay for. Therefore, you should always be careful about checking policies. You will get some hidden and obscure policies sometime which are hard to understand by going through their words only. At that time, simply ask their delegate about thier policies again and have patience until you get the whole thing unequivocally.
Checking FAQs and Customer Reviews makes your job easier.
Cheking customer reviews and FAQ answers can save your precous time greatly. Usually when people like me and you asked few common questions frequently about a product, then it is called Frequently Asked Questions or FAQ. In the mean time, you can get a clear picture of the product according to the experience of the real users of it through the customer reviews.
So, checking out these two things, you will get the idea of both. There can be found such question and answers which doesn’t come into our mind normally. Your understanding ability of percieving about the usefulness of the best 400w power supply will be more sharp.
Final Thought
Afterwards, You should consider the value that the best 400w power supply providing you is viable enough against the price you paying for it. Is it enough to make you pleased? Does it fulfill your intention? We guess, that’s the most important thing.
Hope you enjoyed the whole article which was actually a buying guide to assist you purchasing the best best 400w power supply. Nobody can be more happy than us if you find this a little of helpful to you. End of the day, your satisfaction makes us feel happy.