Having enough power to run your computer system smoothly and efficiently is crucial. For high-end gaming rigs, workstations, and other power-hungry systems, having a powerful power supply unit (PSU) that can deliver stable, clean power under load is a must. If you’re looking for a new 1200w power supply unit to really push your system to the limits, you’ll want to make sure you choose the right one.

In this buyer’s guide, we’ll walk you through everything you need to know to pick the best 1200W power supply for your needs and budget. We’ll discuss what you should look for in terms of efficiency, modularity, warranty, and other key factors. We’ll also provide recommendations on some of the best 1200W PSU models on the market. Whether you’re building an extreme gaming PC or need a 1200W PSU for professional workloads like video editing or 3D modeling, you’ll find the information you need to make an informed buying decision here. So check below to find the best 1200W power supply to give your system stable, reliable power for years to come.

List of The Best 1200W Power Supply

Check out the thorough reviews of the best 1200W power supply in 2023 below.

1. be quiet! Straight Power 1200W Power Supply

be quiet! Straight Power 1200W Power Supply

This be quiet! 1200W power supply elevates the bar of those systems that need virtually quiet operation and excellent efficiency. With the DC-DC design and LLC SR, this PSU offers excellent voltage regulation and advanced stability. The power signal stability is unparalleled in its class. Four high-performance 12V rails are included.

The high-end silent wings 3 (135 mm) fan offers efficient airflow and yet generates very little noise. This is because of the exceptionally optimized fan blade design and the cutting-edge fluid-dynamic bearing. Also, the 6-pole fan motor hugely discards operational noise, offers a long lifespan, and reduces power consumption.

Key Features

  • It is 80 PLUS Platinum certified to provide efficiency up to 94%. As a result, your high-end system benefits from reduced power consumption and quiet and cool operation.
  • The standby drain is less than 0.1 watts.
  • This PSU comes with multi-GPU support along with six PCI-Express connectors.
  • Japanese 105°C-rated capacitors are included to guarantee reliability and stability.
  • This PSU is ErP and Energy Star 7.0 ready.
  • The PSU case features a funnel-shaped fan opening for high airflow intake and high cooling performance.
  • The DC-to-DC conversion provides tight voltage regulation although heavy cross-load is connected. So, it guarantees reliability for the next-gen graphics cards and processors.
  • Dimensions and weight: 13 x 9.75 x 4 inches; 8.1 pounds.

Pros And Cons

  • Modular cables
  • Excellent ripple suppression
  • Good PFC performance
  • 80 Plus Platinum Efficiency
  • Super-quiet performance
  • Overclocking key switch
  • Built-in fan connectors
  • The lack of a way to store excess cabling
  • 5 year warranty, only half of what other models offer

2. Corsair HX1200 1200W Power Supply

Corsair HX1200 1200W Power Supply

Do you want a 1200W PSU that offers steady voltages and maintains quiet operation? If yes then Corsair HX1200 is the best 1200W power supply for you that fulfills these needs. It offers extremely tight voltages and is also famous for maintaining virtually silent operation (made possible with the Zero RPM Fan Mode). The fan doesn’t move until it is required. Hence, you will benefit from virtually silent operation under low and medium loads.

With the included japanese capacitors, this PSU is perfect for high-performance PCs where reliability is crucial. The included accessories are a power cord, mounting screws, cable ties, a corsair case badge, and a user manual. This PSU comes with a 10-year warranty that is backed by Corsair’s technical support and customer service.

Key Features

  • It is 80 Plus Platinum rated to decrease operational cost and extreme heat. This rating makes sure this PSU operates cooler and uses less power than those PSUs which are less efficient.
  • The Fully Modular design allows you to only use the cables required. So, it leads to a clean-looking build with improved airflow.
  • 135 mm Fluid dynamic bearing fan supports Zero RPM mode. So, it guarantees virtually quiet operation at low loads.
  • The Plus12V Rail Switch gives the flexibility to choose from a single plus12V rail or multiple plus12V rails.
  • The implemented safety features are under-voltage protection, over-voltage protection, over-power protection, short circuit protection, and over-temperature protection. These safety features assure maximum safety to the critical system components
  • Dimensions and weight: 5.9 x 7.9 x 3.39 inches; 5.07 pounds.

Pros And Cons

  • Fully modular, semi-passive mode
  • Full power at 46°C
  • Efficient ripple suppression
  • Quiet operation at low and medium loads
  • Ability to switch to multi +12V rail mode
  • Load regulation
  • 10-year warranty
  • OCP at 5VSB
  • Bulky ATX, EPS and PCIe cables

3. ASUS Rog Thor 1200W Power Supply

ASUS Rog Thor 1200W Power Supply

This ASUS 1200W power supply comes with 80+ Platinum certification for high energy efficiency. The entire PSU and your system stay cool with the 135 mm wing-blade fan. One of the unique and best aspects of this PSU is the Aura Sync for lighting synchronization with a widespread aura ecosystem. An RGB connector is included and it plugs into the addressable RGB header on an Asus motherboard. You can neatly organize your cables with the included zip pins and connectors.

Key Features

  • 100% Japanese capacitors offer excellent stability and durability.
  • 0 dB cooling is achieved with dust-proof IP5x wing-blade fans and the built-in RGB heatsinks.
  • OLED screen lets you monitor power draw in real-time. At a glance, you can know how much power your rig is using.
  • Aura sync (addressable) RGB lighting presents an almost infinite spectrum of colors with the capability to synchronize effects throughout the ecosystem of Aura Sync qualified products
  • The AC input range supported is 100V to 240V AC.
  • Dimensions and weight: 7.48 x 5.91 x 1.33 inches; 0.018 ounces.

Pros And Cons

  • The fully modular design allows ease of cable management
  • A bright OLED screen shows all the necessary information
  • The cooling process occurs quietly
  • Aura Sync support offers smooth lighting synchronization
  • 10-year warranty
  • Not suitable for dual GPU systems

4. EVGA Supernova 1200 P3 Power Supply

EVGA Supernova 1200 P3 Power Supply

EVGA Supernova 1200 P3 is one of the best 1200W power supplies on this list in terms of efficiency. It comes with the latest 80+ rating for efficient power output. The included fans blow out cool air which ultimately cools down your whole computer system. This EVGA PSU is fully modular which implies that one cable for the floppy disk or whatever you didn’t use before needn’t have to tuck in the base of the case, although nobody can see it.

Key Features

  • It is 80 PLUS Platinum certified and provides 92% efficiency or even higher under typical loads.
  • With the inclusion of 100% Japanese Capacitors and with the Fully Modular system, it decreases cable clutter and improves airflow.
  • DC-DC design and the full-bridge LLC resonant converter offer tight voltage regulation, and low ripple and noise.
  • EVGA ECO mode and Fluid dynamic bearing fan lead to ultra-quiet operation. They also prolong the lifespan of this PSU.
  • ‎Dimensions and weight: 3.4 x 5.9 x 7.1 inches; 9.13 pounds.

Pros And Cons

  • 1200W Continuous DC output at 50°C
  • Fully modular cables to reduce clutter and improve airflow
  • Silent, fan-less operation at low power
  • Heavy-duty protections: OVP, UVP, OCP, OPP, and SCP
  • Long lifespan
  • 10-year warranty (with registration)
  • Doesn’t support EVGA’s SuperNOVA monitoring software

5. Phanteks Revolt X 1200W Power Supply

Phanteks (PH-P1200PS) 1200W Power Supply

Now it is possible to share the power with another system without extra cost. This Phanteks Revolt X all-in-one PSU is one of the best 1200W power supplies when it comes to sharing power. It combines a power splitter and a power supply in a single unit. With the built-in power splitter, you can easily drive a dual system setup without paying the extra cost of a separate power supply. Hence, power-sharing to another system is simplified.

The included Japanese capacitors are of premium quality and they prolong the reliability and lifespan. Due to high efficiency, less power gets expended in the form of heat. Necessary safety features are implemented to guarantee the safe operation of your PC system.

Key Features

  • With the 80+ Platinum certification, 1200W, and integrated power splitter, this PSU can support dual system setups.
  • With the use of the power splitter, a dual system configuration can independently operate from each other. So, powering on/off on a single system will not influence others and vice versa.
  • The power splitter safeguards and controls the 12V/5V/3.3V/+5Vsb circuit to the motherboard. Hence, it guarantees full compatibility with motherboards with the following form factors: ITX, mATX, ATX, and E-ATX
  • ‎Dimensions and weight: 3.94 x 3.94 x 3.94 inches; 9.3 pounds.

Pros And Cons

  • Excellent reliability and low noise operation
  • Efficient power regulation
  • Clean cable management
  • Compatible with various motherboards
  • Gets hot

6. Thermaltake Toughpower GF1 1200W Power Supply

Thermaltake Toughpower GF1 1200W Power Supply

This Thermaltake PSU is built to offer 80 PLUS Gold efficiency. All PSUs from this series feature Japanese capacitors, a 140mm hydraulic bearing fan, and many other premium quality components to offer constant and steady power.  Reliable performance and quiet operation are guaranteed.

Key Features

  • Form Factor: ATX, Cooling Method: Air, Design: Full Modular
  • The holdup time is 16msec at 100% of the full load input current (15A).
  • The range of input voltage and frequency are 100V – 240V and 50 Hz – 60 Hz. The range of operating temperature is 0°C to + 50°C.
  • The cooling performance is excellent with the 14 cm hydraulic bearing fan.
  • MTBF is a minimum of 120,000 hours.
  • This PSU comes with the following safety approvals: CE, cTUVus, TÜV, FCC, BSMI, and EAC.
  • The included Smart Zero Fan will not spin until the load surpasses 30% of the power supply. So, it minimizes the fan noise.
  • All the ripples are lesser than 30mV on +12V, +5V or +3.3V for load capacity 0% to 100%.
  • Steady and constant power is delivered with an ambient temperature of up to 50°C.
  • ‎Dimensions and weight: 5.91 x 3.39 x 6.3 inches; 7.72 pounds.

Pros And Cons

  • Good build quality
  • Neat cable management with fully modular
  • Adequate number of connectors
  • Not noisy at normal operating conditions
  • Efficient cooling with the side ventilation design
  • Ultra-quiet hydraulic bearing fan
  • Increased noise under stressful conditions

7. Segotep 1250W Fully Modular Power Supply

Segotep 1250W Fully Modular Power Supply

The Segotep 1250W ATX 3.0 gaming power supply is optimized for the latest GPUs and motherboards with PCIe 5.0 and ATX 3.0 support. 80 PLUS Gold certification ensures 91.8% efficiency for reduced power consumption and heat. The fully modular, low-profile cables allow for excellent airflow and reduced clutter in your build.

An intelligent 140mm hydraulic bearing fan leverages AI Cooler technology to operate near silently below 40% load and automatically adjusts between 800-1500RPM above 40% load to maintain cool, consistent power delivery. Built to last with 100,000 hour-rated fan bearings, the Segotep 1250W PSU delivers modern power design focused on efficiency, stability, and quiet performance to fully support next generation components and deliver exceptional reliability for high-end gaming systems.

Key Features

  • It is 80 plus Gold certified.
  • The efficiency is 92% or higher under semi-loads.
  • The fully modular ATX design simplifies making clean and tidy PC builds.
  • The double ball-bearing fan (140 mm) and AI Cooler smart temperature control circuit offer virtually quiet operation at low and medium loads.
  • Heavy-duty protections like OVP, OCP, UVP, OPP, SPD, OTP, and SCP offer maximum safety to critical components of your system.
  • Japanese 105°C rated (industrial-grade) capacitors guarantee efficient power delivery and long-term reliability.
  • The implemented safety features are overload protection, over-voltage protection, under-voltage protection, short circuit protection, over current protection, over power protection, and over-temperature protection.
  • Dimensions and weight: 14.37 x 5.31 x 8.39 inches; 8.54 pounds.

Pros And Cons

  • Easy to use fully modular design
  • Top-notch build quality
  • Appealing and durable finish exterior
  • Whisper-quiet fan
  • Pretty powerful power supply for gaming PCs
  • Cooling fan noise could have been lower

How To Pick The Best 1200W Power Supply?

The details of factors discussed below assist you to choose the best 1200W power supply for your needs.

1. Modular or Non-modular power supply

The most vital thing you need to know is what type of PSU you need i.e. modular or non-modular. Generally, modular power supplies let you add and detach cables (none of them are soldered). Conversely, non-modular units have all required cables pre-attached; you can’t remove any of them.

2. Form factor

The form factor determines if your power supply fits into your case. To avoid hassles regarding how to fit a power supply into a case, standards from factors are invented. There are standard form factors similar to that in motherboards and cases.


Though AT form factor power supplies are available for purchase, they are undoubtedly legacy products and are on the way out. The later ATX form factor power supplies i.e ATX 2.03 and earlier versions are getting obsolete.


In the present market, the ATX12V form factor is the mainstream choice. Multiple different versions of this form factor are available.

The ATX12V v1.0 specification is added to the original ATX form factor with a 4-pin +12V connector that delivers power entirely to the processor. A 6-pin auxiliary power connector delivers +3.3V and +5V voltages. The resultant ATX12V v1.3 specification is incorporated on top of the 15-pin SATA power connector. Note that all ATX12V power supplies retain the same size and physical shape as the ATX form factor.

EPS12V, SFX12V, and others:

Power supplies with EPS12V form factor use an 8-pin processor power connector as well as the 4-pin connector of the ‘ATX12V’ form factor. Primarily, the EPS12V form factor was designed for entry-level servers. Nowadays, a huge number of high-end desktop motherboards contain the 8-pin EPS12V processor power connector. As a result, users can choose an EPS12V power supply.

3. Safety features

Certain manufacturers equip their 1200W power supplies with built-in protection to ensure the safety of components against power-related concerns. Usually, these increase cost to some extent. However, they can provide extra peace of mind.

The overvoltage protection means that the circuit will shut down the PSU if the output voltage surpasses the stated voltage limit (which is usually higher than the rated output voltage). The reason why this protection is significant is that high output voltages may create damage to those computer components which connect to the power supply.

The other two prominent protection functions are overcurrent and overload protection. Essentially, these are circuits that protect the computer and the power supply unit. They work such that when there is an extreme current or power load identified, they protect the system by shutting down the PSU. They also protect against short circuit currents.

FAQs When Picking The Best 1200W Power Supply

1. How much power do I really need for my PC build?

For most standard gaming PCs, a 500W-750W power supply is sufficient. However, if you have a multi-GPU setup or are doing CPU/GPU overclocking, a 1200W PSU provides safe headroom for peak power draws.

2. Is a 1200W power supply overkill for my needs?

A 1200W PSU may be overkill if you have a mainstream PC build. But for high-end gaming rigs and workstations, 1200W can provide the necessary power delivery and future upgrade flexibility.

3. What efficiency rating should I look for in a 1200W PSU?

For the best energy efficiency, look for 80 Plus Gold or 80 Plus Platinum rated 1200W power supplies. This can save on electricity costs over time. 80 Plus is a superior rating system that denotes how effective a PSU is. This rating denotes whether a power supply unit can deal with its tasks at 80% efficiency across its supported load range. In case this rating is high, the PSU is very reliable.

4. Is it worth paying more for a fully modular 1200W PSU?

Yes, a fully modular PSU allows you to only connect the cables your PC needs, reducing clutter. This is worth paying extra for.

5. What is the importance of noiseless fans in PSU?

All PSUs are prone to overheating when there is a heavy load. Hence, proper power supply units are equipped with special fans. If you like working alone and dislike being distracted by sound then it is recommended to purchase a PSU with the noiseless fans. You can buy a PSU with larger fans which are nearly soundless because they don’t spin very quickly.

Final Thoughts

Choosing the right 1200W power supply is critical to ensure your high-end system has enough stable, clean power to perform at its full potential. While the upfront cost of a 1200W PSU may be higher than lower-wattage options, the peace of mind and performance gains are well worth the investment. Based on key factors like efficiency, modular cables, warranty coverage, and quality internal components, we have listed our top picks for the best 1200W PSU. These units deliver excellent power and efficiency for high-end gaming rigs, workstations, overclocked systems, and other demanding applications.

No matter which 1200W PSU you choose from our recommendations, be sure to select a high-quality unit from a trusted brand. Never compromise on the quality of your power supply. With a solid 1200W PSU powering your system, you’ll have the headroom and stability to push your components to their limits. Thanks for reading our 1200W power supply buyer’s guide. We hope this has helped you make a more informed purchasing decision.

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