8 Best 850w Power Supply In 2021 [Honest Review]

The primary function of a PC power supply is to convert AC into DC and then channel it to the motherboard, adapters, and other peripheral devices of a computer. Since the market is flooded with options, choosing the right power supply is one of the toughest jobs while building a new PC.

Many modern gaming systems with a 6 or 8-core CPU and a mid-range to high-end graphics card should be equipped with an 850W power supply. But which one should you get from tons of options out there? Well, if you are looking for some of the best 850W power supplies, then luckily you have come to the right place.

In this piece of writing, we have talked about the 7 best 850W power supplies considering their performances and other important factors. So, without any further ado let’s find out.

1.ASUS ROG Strix 850W

Asus is a trusted manufacturer of PC components. ROG Strix 850W is the latest addition to their PC power supply solution. This high-performing device can perform flawlessly even at higher temperatures. You can consider this to work with all PCI-E-based SLI cards.

The integrated ROG heatsinks cover all the critical components to minimize the heat, produced during gaming or overclock operation. Heatsinks not only reduce fan noise but also maximize the life span of the power supply by generating less heat on the surface.

Axial-tech fan design requires a smaller fan hub. And it leaves more space for longer blades and barrier rings to produce more air pressure to keep the power supply cool even in a full load. The extended blade of the fan can cool down things at low RPMs to keep the promise of 0dB operation for a longer time.

There are debates on the ROG Strix 850W’s fan bearing. But the manufacturer has clearly stated that they prefer durability over everything else for their power supply. So, they have used dual ball fan bearings that ensure life expectancy twice as long as a sleeve bearing design.  

Don’t be surprised by the 80 Plus Gold Certification to this power supply. High-performing Japanese capacitors used in the device ensures quality operation. Capacitors play a significant role in generating less heat and thus release pressure from the fan, which results in noise reduction.

Moreover, these ROG Strix Series PSUs come up with additional magnetic logos and stickers so that you can reskin the visible side according to your taste. Another interesting thing that may catch your attention is its full modular flat black cables. All the key cables are present in the box. All you need to do is plug both ends of the cables to power up the pc.

The cables of a non-modular power supply are permanently attached to it. So, it’s harder to replace any of its components. On the other hand, a fully modular power supply can be disassembled separately – if you don’t know the difference between them.


  • High performance 
  • Silent operation 
  • Fully Modular
  • Durable 
  • Longer fan blade 
  • Cosmetic Customization.


  • Not compatible with the alternative sleep mode 
  • Inconsistent response at 3.3V
  • Distance of connectors.

2.Thermaltake Toughpower GF1 850W

The performance of this power supply justifies the name Toughpower itself. This is also a fully modular power supply that comes with 80 Plus Gold efficiency certification. It is optimized to work with all generations of Intel’s processors to reach optimal energy saving.

The power supply has a 140mm hydraulic bearing fan. The intelligent RPM control system ensures superior cooling performance and almost a noise-free operation. There are seven concentrated compressed fan blades to keep the power supply cool even in the stretched conditions.

G1 850W comes with a pre-installed Ring 14 RGB fan that offers five lighting modes. You can set the colour of your fans with the help of built-in memory.  An on/off switch for the Smart Zero Fan feature ensures zero noise when the fan operates below 10% workload.

Unlike many other power supplies, it offers a side ventilation system. It is a smart move from the Thermaltake design team. On top of that, a durable chassis and anti-vibration mounting system make it useful for the user. All ripples are lower than 30mV in normal operations, which is way above Intel’s standard.

When it comes to capacitors, everyone expects Japanese capacitors for their 80 plus efficiency certified power supply, as they are both stable and reliable. Premium Japanese 105°C/221°F capacitors installed in the device provide remarkable durability and provide top performance in full stress.

One of the primary functions of a power supply is to ensure consistent voltage flow. GF1 is pretty good at regulating voltage to an extreme level. Intel’s standard is ±5% for major rails and ±10% for 12V whereas the GF1 power supply is set to no more than ±2% and ensures noteworthy performance.

Thermaltake has taken its fully modular power supply to another level in the GF1 series. Now you can say goodbye to messy wires and cables inside the box. Low-profile flat black cables make it easier for quick handling. It also creates more space inside the chassis and increases airflow for faster cool down.


  • Strong Chassis 
  • Fan Mounted in Side
  • Large Fan 
  • Lower ripple sound
  • Better voltage consistency


  • Dust enters easily inside the chassis 
  • Vibrates if not mounted.


The CORSAIR RM series has been a hit for the manufacturer. It has drawn the attention of enthusiasts for revised performance and quieter fan noise. Periodical modifications to their power supply units have earned them acceptance in the last few years.

RM850x is one of the high-end power supplies from this vendor. Even after the latest update, they stayed loyal to Channel Well Technology for OEM. Durable chassis with chamfered edges remains almost identical for all the advanced models of CORSAIR power supplies.

It comes with a 140mm magnetic levitation fan. Perhaps, they are the first manufacturer to introduce this particular type of fan in any power supply. It reduces rotation noise to a pleasant level. On top of that, the motor does not create any frictional sound at all.  All you can hear is the sound of airflow generated by the rotating fan blades.

The RM850x is compatible with Microsoft’s modern standby and can wake the computer from sleep in a quick time.  It can operate in extreme temperatures up to 50 °C which is good enough for any high-end power supply.

Voltage regulation is consistent for this device. RM850x is capable of delivering accurate performance from 10% to 110% load. You might go for this product if you often need overclocking. The ripple limits for this device are 120 mV (+12V) and 50 mV (+5V, +3.3V, and 5VSB).

All the major protection systems such as over-voltage, under-voltage, over-power, short circuit or surge protection and most importantly over current protection (+12V) work pretty fine. But unfortunately, you don’t have any fan failure protection for it.

All the capacitors used in the device are 100% Japanese and capable of sustaining in excessive heat. Premium internal components such as Nichicon capacitors and filtering inductors ensure the standard of a high-performance power supply.

You can build and upgrade quite easily as the device is fully modular. The number of PCIe connectors provided by CORSAIR will not leave you dissatisfied. There are two EPS connectors as well as SATA and 4-pin Molex to make the setup easy for you.


  • Convenient Size 
  • Quiet Performance 
  • 2x EPS & 6x PCIe connectors
  • Intel Skylake Compatible
  • Fan-less operation in simple everyday tasks
  • Fully modular.


  • In-cable caps
  • peripheral cables are short 
  • No RGB or fan lighting 
  • Performance degrades in high ambient temperature.

4. MSI MPG A850GF 850W

MicroStar International Co Ltd or MSI is generally known for its high-quality motherboards and graphics cards. Power supplies are a new addition to their product line as the company expands its wings. You should know that MSI launched its first-ever power supply more than a decade ago, but it failed!

And that’s why the new A850GF has lots of expectations from both ends. Solid build quality and 80 Plus Gold certification indicate that they really wanted to make an impression here. Full black finished exterior with a diameter of 160mm-long and 150mm-wide ensures an easy fit in most PC cases.

It features a 140mm fan that can produce maximum airflow at a slower rpm rate like most other power supplies. This unit comes with an ONG HUA fan which is rated 12V, 0.36A, and uses Fluid Dynamic Bearings (FDB) that can sufficiently drive a lot of air when required.

It comes with PFC or Active Power Factor Correction. Thankfully, it can correct itself automatically for AC input voltages and is capable of generating a power factor of over 95%. Besides, you have industrial level protection with OVP, OCP, OPP, OTP, SCP, and UVP to overcome any unwanted power issues.

The internal build quality of the A850GF is enriched with all Japanese 105°C capacitors in both primary and secondary stages. You will also find Nippon Chemicon solid and standard capacitors and FPCAP solid capacitors inside the power supply. So, soldering is neat and clean here.

The MPG gaming power supply can support the NVIDIA GeForce RTX 30/20 Series and AMD GPUs. Different graphic cards come with different power connector designs. So, A850GF’s IO supports are prepared with adaptable ways of connection.

The minor rails of 5V and 3.3V have a capacity of 22A each. And together they can offer 120W as per the specification mentioned by the company.  It has 6 PCIe connectors, 8 SATA connectors, and 4 Molex connectors altogether.

And again, this is a fully modular power supply. Flat black cables are used internally to maximize airflow. Interestingly, MSI has opted for alloy copper terminals instead of traditional bronze copper terminals so that it can withstand higher current ratings.


  • DC to DC module design 
  • Active PFC design
  • Flat Cable Equipment
  • Quieter Performance 
  • Sufficient Cable Distance


  • Rails distribution is not clearly defined 
  • No fan switch
  • No Lighting.

5. NZXT C850W Gold ATX

NZXT is a reputed American manufacturer providing gaming PCs and other components such as power supplies for a while. C850 is one of their high-end power supplies that comes with robust build quality and energy-efficient performance.

But what makes NZXT unique from other power supplies in the market is its digital CAM integration. It enables users’ real-time power monitoring, control over fan and OCP adjustments via CAM software.

120mm fluid-dynamic bearings fan mounted at the side, drive off internal heat out of the chassis quite sufficiently. But the diameter of the fan is slightly lower than most other common high-end power supplies we come across nowadays.

The fan setup offers a user-selectable Zero RPM fan mode to keep it off while working under 100 watts. This ensures absolutely silent operation during your regular easy-going computer works. Whenever full stress is put on the fan it can produce speed up to 2,200 rpm. Maximum airflow is 73.9 CFM and can create noise as much as 32.3 dBA, which is pleasant enough.

80 PLUS Gold provides up to 90% power conversion efficiency ensuring reliable consistent power. It is powerful enough to support 2080ti and Vega 64 GPUs. On top of that, it offers multi-GPU configuration as well.

DC output ratings for +3.3V and 5V are 20A combined and +12V is 70A (840W). PFC is active at 0.99. Common protections are available for this power supply except for fan failure protection.

This is also a fully modular power supply that offers users to use the only necessary cable and keeps the internal space open for sufficient air-flow. You will get a 24-Pin ATX Power Cable, two 4+4-Pin CPU Power Cables, three 6+2-pin PCIe Power Cable, 2 SATA, and 2 Peripheral cables in the box.

One thing you might find very disturbing is the company logo gets upside down when you install the power supply inside your computer. Otherwise, it is overall a praiseworthy power supply as far as its performance and effectiveness are concerned.


  • Hybrid Fan
  • Consistent performance in full stress
  • Low inrush current
  • Fully Modular
  • CAM integration.


  • The fan makes noise in overclocking
  • Ordinary transient response at 3.3V
  • Smaller fan

6. Gigabyte GP-P850GM

Gigabyte is primarily popular for its motherboards rather than power supplies. But following Asus’s domination in this market, they have also stepped on the gas to add some strengths to their power supply portfolio.

This is actually a cheaper and reskinned version of the Gigabyte AORUS GP-AP850GM power supply. The key difference between the two is that the AORUS version uses a 135mm Double Ball Bearing Fan whereas this one opts for the Hydraulic Bearing Fan.

We have talked about different 850W power supplies in this article. And this is the best product as far as aesthetics are concerned. Full black and premium finish makes it look super attractive. The model name and the cut-through design of the front side give it a gaming vibe.

The dimension of this unit is 5.51 x 5.91 x 3.39 which is a good fit for typical computer casings. Smart Hydraulic Bearing (HYB) Fan is mounted at the side of the chassis and has a diameter of 120mm. The fan comes with an advanced feature of fan stop function that shuts off the fan if power load is below 20% or in stand-by mood.

80 PLUS GOLD Certifications ensures high-efficiency operation for lower operating costs. Powerful rails offer stable DC output. You will get +3.3V@20A, +5V@20A, +12V@70.8A, -12V@0.3A, and +5VSB@3A constantly. But a novice may find it a little difficult as none of the cables are labeled. Also, the indications are obscure in the terminal.

However, you will get 2x 4+4 CPU PCI-E Cables and 2x 6+2 PCI-E Cables here. There are five individual PCI-E slots on it, two for CPU and 3 PCI-E for GPU. All the cables are fully black and flat. Some of you might find it good and some may consider it as a con.

The main capacitor of this unit is 100% Japanese and the life expectancy is more than 20 years which is 4 times more than any regular capacitor. Gigabyte has stated that they have installed all the regular protection measures such as OCP, OVP and SCP, etc. in the power supply.


  • Compact size
  • ATX 12V v2.31
  • Fully Modular
  • The fan adjusts itself automatically
  • Easy to install.


  • Sub-capacitors are not Japanese 
  • The main cable is not fireproof
  • The power switch doesn’t look premium.


Our last product in this article should have ranked higher on the list. But as you can see all the products are almost identical in their performances, so being the last doesn’t necessarily portray any negative connotation to this one.

This ATX type 850W poq suits any overkill gaming PC. It supports the 30XX series and any high-end graphics card with modern PCI-E 6+2pin connectors. DC to DC stable voltage supply offers great value for gamers and PC builders.

It comes with a 140mm fan which ensures whisper-quiet heat dissipation. The intelligent fan speed control offers zero noise when the machine is under 10% load. Honeycomb ventilation system not only offers better airflow inside the unit but also makes it look remarkably cool than any of its kind.

It doesn’t support any standby mode for the fan. This means the fan will always rotate even if you are not putting any load on the computer. But you won’t hear a bit of noise unless you are doing something stressful on the pc.

Some of the renowned and veteran manufacturers tend not to provide full set cables with the unit. But, not in this case. Perhaps, ARESGAME has offered the best cable connectors in the history of power supply product line.

External cables and connectors of this fully modular power supply are glossy black and have additional bushing to avoid frictional damage. Each of them has a magic cable tie so that there is no loose connection. I bet you will not find this feature in any other power supplies.

You might be amazed to hear that this is the only product on the list not to use any Japanese capacitors. Instead, they are using Chinese Capxon Electrolytic Capacitors – chew on that.

ARESGAME AGK850 850W also comes with 80 Plus Gold certification and has full protection including OVP/UVP/OPP/SCP/OCP. Also, it comes with a short-wired 24-pin-compatible “testing” plug. You can simply plug it into the terminal. If the fan starts rotating, you are ready to install it on your PC.


  • Durable cable
  • Performs well under pressure
  • Charming outlook
  • Durable chassis
  • Simple design
  • Fully modular.


  • No RGB lighting, 
  • No on/off switch lighting
  • Zero fan feature missing.

Factors You Should Consider Before Buying a Power Supply


850W power supplies are actually high-end power supplies. So, make sure whether you need it or not. You can use a calculator to determine your required wattage. For future upgradation and safe-play, add 15-20% more to your total count and then go for the power supply.

Energy Efficiency

You may not consider it in the heat of the moment. But if you get a power supply that is not energy efficient, you might end up losing a good amount of money on electric bills. The 80PLUS organization will help you in this regard. One of the key features of a smart power supply is the 80 Plus Certification. So, make sure you order the right one.

Active PFC

The purpose of the Active Power Factor Corrector is to make the apparent power equal to the original power. It ensures no power is lost in the process of converting currents. It also assists in stable voltage regulation and keeps the power supply cool in operation.


Fully modular power supplies allow users to easily organize the power connections. It also lifts the burden of hiding long cables inside the power supply and opens up more space for better airflow. On top of that, you can easily replace any of the cables in case you feel for an upgrade.

On the other hand, non-modular power supplies come with non-removable cables from the housing. But this is not good if you are looking for a neat and clean power supply. So, if you are an enthusiast who opts for cable customization, it’s better to go with the fully modular setup.

Frequently Asked Question

Which type of fan is the best for power supplies?

Ans. As far as noise reduction is concerned, magnetic levitation fans are better for any power supply. But hydraulic bearing or fluid-dynamic bearing fans also offer quieter performance on heavy usages.

What is the accurate size of a power supply?

Ans. It depends on the form factor of your power supply. The most popular form factors of the latest power supplies are ATX, ATX12V v1.x, ATX12V v2.x.

Can I run my computer without a power supply?

Ans. No, you can’t. Just can’t.

Final Thought 

It is better to get a reputed power supply for long-lasting stable power management. A good power supply should have the features to save itself as well as other expensive parts of the computer in case of a power catastrophe. We hope this review article about the 7 best 850W power supplies was helpful enough to figure out the right one for you