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Now that you got your shiny new GeForce RTX 30 Series graphics card, you want the best power supply unit (PSU) for your next gaming rig. NVIDIA recommends at least 750W PSU for the RTX 3080 and RTX 3090 GPUs, or even more depending on your system configuration. It’s for that reason we’ve researched the best 750W PSU in the market, and here are our recommendations.

NVIDIA PSU Diagram

Credit: NVIDIA

A power supply is the most overlooked component when building a PC, but it is very vital. Choosing the wrong power supply unit (PSU) for your PC can have drastic effects such as PC freeze, random resets, or instability when overclocking. These top picks of the best 750W PSU will not only work with the RTX 3080 and RTX 3090 but with other GPUs and PC configurations, supplying the power to allow maximum PC performance.

Our guide includes the best 750W PSUs in the market, including modular, non-modular, budget PSU, SFX, and the most high-end option to give you the power for higher FPS gaming, overclocking, or 8K video rendering.

How to Calculate Power Supply Watts

Before buying a power supply, the first thing is to determine how much wattage you need for your build. But most users are left wondering, how do I figure out my power supply wattage?

The answer is simple. Most PSU manufacturers include online tools to determine the number of watts you need for your PC build. These tools, also known as wattage calculators, provides the minimum power sufficient for your rig. Therefore, you must keep other things into consideration, such as using multiple graphics cards or adding more components in the future, and make the necessary adjustments to find the appropriate wattage for your PC.

Here are the top wattage calculators to help you determine if a 750W PSU is enough for you:

Nvidia GeForce RTX 30 Series Power Requirements

If you’re building a PC featuring RTX 3080 or RTX 3090 graphics card, NVIDIA recommends using at least a 750W power supply. According to NVIDIA, the GeForce RTX 3080 draws 320W of power while the RTX 3090 draws a whopping 350 Watts. Therefore, a 750W power supply is the best for the high-end RTX 3080/3090 GPUs with the low tier 3070 requiring only a 650W power supply.

All the PSUs featured in this article are ideal for the GeForce RTX 30 Series graphics cards. Whether looking for a budget or the most high-end 750W PSU, we have covered every option for you.

The Best 750W PSUs Compared

ImageProductDetailsCheck Price
Corsair RM Series RM750 on Amazon
Corsair RM Series RM750Efficiency: 80 Plus Gold
Modularity: Fully Modular
Form Factor: ATX
Semi-passive (Fanless) Mode: Yes, under 50% load
RGB: No
Warranty: 10 Years
Check on Amazon
Cooler Master MasterWatt 750 on Amazon
Cooler Master MasterWatt 750Efficiency: 80 Plus Bronze
Modularity: Semi Modular
Form Factor: ATX
Semi-passive (Fanless) Mode: Yes, under 15% load
RGB: No
Warranty: 5 Years
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Corsair SF750 on Amazon
Corsair SF750Efficiency: 80 Plus Platinum
Modularity: Fully Modular
Form Factor: SFX
Semi-passive (Fanless) Mode: Yes, under 40% load
RGB: No
Warranty: 7 Years
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Thermaltake Toughpower 750W Gold (Modular) on Amazon
Thermaltake Toughpower 750W Gold (Modular)Efficiency: 80 Plus Gold
Modularity: Semi Modular
Form Factor: ATX
Semi-passive (Fanless) Mode: No
RGB: No
Warranty: 5 Years
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Thermaltake Smart BX1 RGB 750W on Amazon
Thermaltake Smart BX1 RGB 750WEfficiency: 80 Plus Bronze
Modularity: Non-Modular
Form Factor: ATX
Semi-passive (Fanless) Mode: No
RGB: Yes
Warranty: 5 Years
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Seasonic Prime 750W Titanium on Amazon
Seasonic Prime 750W TitaniumEfficiency: 80 Plus Titanium
Modularity: Fully Modular
Form Factor: ATX
Semi-passive (Fanless) Mode: Yes, under 40% load
RGB: No
Warranty: 12 Years
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GameMax RGB750 Rainbow on Amazon
GameMax RGB750 RainbowEfficiency: :80 Plus Gold
Modularity: Fully Modular
Form Factor: ATX
Semi-passive (Fanless) Mode: No
RGB: Yes
Warranty: 5 Years
Check on Amazon
XPG Core Reactor 750W on Amazon
XPG Core Reactor 750WEfficiency: 80 Plus Gold
Modularity: Fully Modular
Form Factor: ATX
Semi-passive (Fanless) Mode: No
RGB: No
Warranty: 10 Years
Check on Amazon

1. Corsair RM Series RM750 – Best 750W Overall

The Corsair RM Series RM750 is the best 750W power supply in the market, suitable for medium to high-end PC builds. It meets NVIDIA’s 750W minimum requirements, making it the best PSU for the RTX 3080 and RTX 3090 GPUs. The PSU comes from one of the most reputable brands in the industry, providing top-notch build-quality and reliable performance.

Corsair RM Series RM750 has a fully-modular design, so you can use only the cables you need to keep cable clutter to a minimum and improve airflow on your PC. Corsair managed to keep the high-quality capacitors, board, and a fan in a 160mm long casing, which fits most ATX PC cases. The RM750 uses 105°C-rated capacitors that deliver stable power and improved durability and reliability.

Corsair RM Series RM750 is one of the most silent PSU available with zero RPM fan mode on low to medium loads. The 135mm rifle bearing fan only spins at tights loads, keeping noise to a minimum.

Now to the best-selling point of this PSU, efficiency. The Corsair RM Series RM750 is 80 Plus Gold certified, offering up to 90% efficiency, ensuring low energy consumption and operating temperatures. Sure, you can get an 80 Plus Platinum 750W PSU for even better efficiency, but unless you’re building a really high-end PC with multiple GPUs and demanding components, the RM Series RM750 should suffice for most PC builds.

OUR TAKE
Corsair RM Series RM750 is the best 750W PSU in the market. Built with high-quality components, the PSU delivers high efficiency, reliability, and durability that meets its 80 Plus Gold certification. With silent operation and a 10-year warranty, the RM Series 750W is easy to recommend for medium to high-end PC builds, especially RTX 3080 and RTX 3090 builds.
PROS

  • High-quality capacitors
  • Fully modular
  • Fanless under 50% load
  • Over Power Protection
  • Supports Modern Standby mode
  • Reliable with a great warranty
CONS

  • Cannot disable semi-passive operation
 

2. Cooler Master MasterWatt 750 – Best Budget 750W PSU

Cooler Master’s MasterWatt 750 is the 750W PSU we recommend in all of our budget gaming systems builds. If you’re building a PC under tight budget constraints or looking for the best budget path to a powerful RTX 3080 powered system, we recommend this budget 750W PSU from Cooler Master. The MasterWatt 750 offers reliable performance for under 100, with minimal loose ends.

Of course, you can get even cheaper 750W PSUs from unknown or less reputable brands, but we don’t recommend this path since PSUs are critical in a motherboard, and a small hitch can prove fatal to your PC and other components such as the GPU.

The MasterWatt 750 is a semi-modular PSU with only the necessary cables installed. It is a suitable option for ATX PC builds, especially for the ATX 12V v2.4 standard. MasterWatt 750 is one of the silent PSUs running at 0dB under 15% load and around 16dB on tight loads. You’ll barely hear the fan when doing light tasks such as browsing or watching movies. Combine IP6X dustproof rating and 16 AWG PCIe cables, and you get a durable and reliable build quality despite its low price tag.

The performance is impressive. The MasterWatt 750 has an 80 Plus Bronze certification, offering 85% typical efficiency. It is nowhere near the Gold and Platinum PSUs, but hands down the best at that price point. You get all the essentials with a 5-year warranty to give you peace of mind. So, if you have less to spend yet don’t want to make many compromises, the MasterWatt 750 is the way to go.

OUR TAKE
Cooler Master MasterWatt 750 is a great 750W PSU for those on a budget. You can build a high-end PC with this PSU without making many compromises. The 80 Plus Bronze certification, semi-modular design, and fanless mode, and 5-year warranty provide an unbeatable value at this price. No matter what budget you have, you can always build a powerful rig for streaming and productivity.
PROS

  • Excellent value
  • Fanless under 15% load
  • Decent build quality
  • IP6X dustproof
  • 5-year warranty
CONS

  • Semi-modular
 

3. Corsair SF750 – Best SFX 750W PSU

If you’re building a small form-factor PC, the Corsair SF750 is a suitable 750W PSU for mini-ITX or Micro ATX PC builds. The PSU is very compact yet powerful than some massive power supply units. Corsair ships it with an adapter if you want to use it with a regular ATX case instead. SFX PSUs fit most ITX and Micro-ATX computer cases, providing enough clearance for airflow and cooling.

While the Corsair SF750 is priced higher, it offers outstanding build quality and performance worth every penny. The PSU features high-end Japanese capacitors that provide stable power and improved durability. That means lower ripple noise, which enhances the lifespan of other motherboards components such as GPUs. Corsair beefs the PSU with a fully modular design and a zero-noise fan that stays silent until the load reaches 300W.

The Corsair SF750 is a beast in terms of performance. With 80 Plus Platinum certification, the SF750 delivers impressive efficiency up to 92 percent. The PSU has minimum power loss even at higher loads, keeping your power bill down. You can overclock your PC to get higher refresh rates without turning it into an oven or running into instability issues. This 750W PSU has a seven-year warranty.

OUR TAKE
Compact but powerful. The Corsair SF750 is an outstanding 750W for small form factor systems. If you’re building a mini-ITX or micro ATX PC, this SFX power supply is perfect for you. It’s expensive but provides decent built quality with outstanding performance to meet its 80 Plus Platinum efficiency rating. It’s the best there is if you want to build a high-end gaming or editing rig.
PROS

  • Compact size
  • Supports ATX cases through an adapter bracket
  • High-quality capacitors
  • Fanless under 40% load
  • Seven-year warranty
CONS

  • High price than ATX PSUs
 

4. Thermaltake Toughpower 750W Gold (Modular) – Best Semi-Modular 750W PSU

The Toughpower 750W Gold (Modular) from Thermaltake is our recommendation for the best 750W semi-modular PSU. This PSU comes with high-quality components offering impressive peak performance with minimal loose ends. A semi-modular strikes a balance between a non-modular and fully-modular PSU. In this case, the Thermaltake Toughpower 750W comes with the 24pin preinstalled with the other cables as modular.

While semi-modular PSUs offer an excellent price, you have limited customizations as you can’t use cable mods, such as braided or RGB cables, on the preinstalled ones.

The main reason to consider this PSU over the semi-modular Master MasterWatt 750 PSU is the 80 Plus Gold certification. Thermaltake Toughpower 750W has better efficiency up to 90 percent, resulting in low power loss and low operating temperatures. It has 100% Japanese capacitors to provide unwavering performance and reliability. With only one cable permanently attached, this can be one of the best deals considering its lower price than fully-modular 750W PSUs.

The Thermaltake Toughpower 750W does not have a zero RPM mode, but the 140mm cooling fan runs incredibly quiet, and it won’t distract you unless on demanding tasks like gaming or rendering. This PSU works with most ATX PC cases and motherboards in the market.

OUR TAKE
Thermaltake Toughpower 750W is a semi-modular 750W power supply perfect for users who demand higher performance on a lower budget. With only one cable attached, you can still implement a clean build with excellent airflow and clearance. So, there are no many compromises here. And with its 80 Plus Gold efficiency and high-quality components, we can recommend this 750W PSU for most medium to high-end PC builds.
PROS

  • Great value
  • Quiet fan
  • High-quality capacitors
  • Only one cable attaches, the rest are modular
CONS

  • No semi-passive mode
  • Shorter cables
 

5. Thermaltake Smart BX1 RGB 750W – Best Non-Modular 750W PSU

If you want excellent features and performance for the price, this Smart BX1 RGB 750W PSU from Thermaltake fits the bill. It features no modularity but offers impressive performance and decent design, providing the best bang for your buck. That means you must arrange the cables to reduce clutter and provide more room for airflow and clearance.

One of the reasons to buy the Smart BX1 RGB 750W PSU is the beautiful RGB lighting. The PSU has 10 LEDs on the 120mm fan with seven color options and three lighting modes to light up your gaming rig and add some beautiful aesthetic. You can change the colors and lighting modes using the RGB lighting button. The Smart BX1 RGB 750W is an excellent PSU for those who want a lighting show on a budget.

However, you cannot sync the colors with an RGB controller, which can be a dealbreaker if you want consistent colors across your peripherals.

For the performance, the Smart BX1 RGB 750W is 80 Plus Bronze certified, providing up to 88% performance. It may draw a lot of power than 80+ Gold PSUs, but the difference is negligible in real-world use. It has Japanese capacitors, ensuring greater reliability and low ripple to keep your GPUs and other critical components operating for a long time.

While this PSU appeals to most users due to its budget price, some compromises are made. The cables can be messy with no proper management, which may lead to thermal problems. And there is no semi-passive mode. The fan operates at around 20dB on low loads.

OUR TAKE
Thermaltake Smart BX1 RGB 750W is a budget 750W PSU with excellent aesthetics and some fewer downsides. The price is a bargain for the features you get, including high-quality capacitors and near 80- Plus Gold performance. But its non-modular design means proper cable management is a must or risk overheating problems or even worse problems. The RGB lights are an excellent addition to the even best value selling point.
PROS

  • Great aesthetics with RGB lighting
  • Great value
  • Lower price
  • Impressive efficiency
  • Overvoltage, over current, and short-circuit protections
CONS

  • Non-modular
  • Can be loud on normal use with no semi-passive mode
 

6. Seasonic Prime 750W Titanium – Best High-End 750W PSU

If you want the best 750W power supply with no compromises or loose ends, check out the Seasonic Prime 750W Titanium. This has been the best power supply over the past few years and still is the best in 2020. With the highest 80 Plus rating backed with a 12-year warranty, the Seasonic Prime 750W Titanium makes the best power supply for NVIDIA RTX 3090 graphics cards. But you must be ready to match its high price.

Seasonic’s Prime 750W Titanium power supply ticks all the boxes with barely any downsides. This PSU has a fully-modular design and a unique cable-free connection that improves the output power quality. It’s one of the few 750W supplies with outstanding voltage regulation, amazing ripple suppression, and incredibly lower working temperatures. Combine this PSU with a high-performance motherboard to drive stable and reliable power to overclock demanding CPUs and GPUs like the RTX 3080.

The Seasonic Prime 750W Titanium operates at 91% and 94% efficiency on most occasions, thanks to its 80 Plus Titanium certification, resulting in very low power loss and low temperatures.

Besides the impressive efficiency, the fan remains idle until 40 percent load (300W), providing a quiet work environment. The fan uses a fluid dynamic bearing, generating less heat and noise, improving the overall reliability and lifespan. It’s worth spending more on the Seasonic Prime 750W Titanium, knowing it will serve you for the many years to come.

OUR TAKE
While the Seasonic Prime 750W Titanium’s performance and build quality are undeniable the best in the market, is it worth the price? For average users, probably no. But for avid gamers and enthusiasts who demand a premium performance with no compromises, it’s worth investing more for this PSU. The PSU guarantees high efficiency at low to high loads, ensuring you can overclock your PC and push it to the limits without any problems.
PROS

  • Titanium certification
  • 12-year warranty
  • Fanless under 300W
  • Solid build quality
  • Fully modular
  • Amazing ripple suppression and load regulation
CONS

  • Expensive
 

7. GameMax RGB750 Rainbow – Best RGB 750W PSU

GameMax RGB750 Rainbow is another 750W PSU ideal for the RTX 3080 and RTX 3090 graphics cards. This PSU features RGB lighting to bring your gaming setup to life with great aesthetics and beautiful colors. It is a great power supply for modern gaming PC builds or for those looking to add RGB colors in their setups.

The GB750 Rainbow PSU features multiple RGB LEDs on the 14cm fan with ten present lighting effects. A built-in controller allows you to change the lighting modes and colors through the ARGB controller switch. The LEDs can display up to 16.8 million colors, so you’re only limited by your imagination.

Elsewhere, the PSU features a fully-modular design that allows you to use only the cables you need for a neat look and clearance for maximum airflow. Onboard, Japanese capacitors ensure improved reliability and durability with uncompromised performance. GameMax RGB750 Rainbow implements different protection standards, such as Over-Voltage Protection, Over-Power Protection, Over Current Protection, Short Circuit Protection, and more to protect your critical motherboard components.

With 80 Plus Gold certification, the PSU offers efficiency up to 90%, lowering power usage, power loss, and operating temperatures. The build quality and performance are top-notch. Well, except the fan. There is no semi-passive mode, which makes the fan audible even in lower loads. GameMax backs the impressive performance with a 5-year warranty to give peace of mind when overclocking your system.

OUR TAKE
The GameMax RGB750 Rainbow PSU excels not only in RGB lighting button performance too. With 90% peak efficiency, the PSU meets its 80 Plus Gold certification, providing excellent performance to match the RTX 3080 and 3090 requirements. Still, the RGB is the best-selling feature of this PSU, which makes it popular amongst gamers.
PROS

  • Great aesthetics
  • Ten lighting preset lighting modes
  • Competitive pricing
  • Fully modular
  • 5-year warranty
  • High-quality capacitors and impressive performance
CONS

  • RGB doesn’t sync with other components
  • No semi-passive mode
 

8. XPG Core Reactor 750W – Best for New ATX Specifications

The XPG Core Reactor 750W is the last recommendation in our roundup of the best 750W PSUs. It conforms to the latest and stringent ATX requirements for the new ATX specifications, making it the best PSU to buy in 2020. The XPG Core Reactor 750W makes a perfect PSU for the RTX 3080 and RTX 3090 if you want to leverage ATX new requirements, such as alternative sleep mode compatibility and higher efficiency at light loads.

In terms of design, this power supply implements a fully modular cabling system. You can only use the cables you need in the case to keep clutter to a minimum. This is yet another 750W PSU with Japanese capacitors to deliver premium performance and reliability. With its high-grade components, the XPG Core Reactor 750W reduces ripple and noise by 35%, ensuring dependability and improved lifespan of critical motherboard components.

XPG Core Reactor 750W comes with 80 Plus Gold certification providing up to 90% efficiency on normal loading condition. The PSU hits 87% on light loads and 88% on tight loads. This PSU has essentially the same performance as the Corsair RM Series RM750. The reason to buy the Reactor 750W is to meet the 2020 ATX requirements; otherwise, the Corsair offers a better deal at a lower price.

Onboard you get a quiet fan that operates at incredibly low noise under 50 percent load, but it does not support zero RPM mode. With industrial-grade protection and a 10-year warranty, the PSU will serve you for many years without running into any problems. The excellent warranty will give you even better peace of mind as you go on building your powerful RTX 3080 or RTX 3090 rig.

OUR TAKE
XPG Core Reactor 750W is a high-end 750W power supply that meets the requirements of the new ATX specification. It supports the modern standby mode and offers impressive efficiency at light loads. The overall efficiency is excellent, backed with reliable protection and a 10-year warranty. But this PSU is priced higher than the overall best Corsair RM Series RM750. So, unless you want new ATX spec compatibility, we suggest going with our editor’s choice.
PROS

  • Supports Modern Standby mode
  • Very efficient and reliable
  • High-grade Japanese capacitors
  • Fully modular
  • 10-year warranty
CONS

  • No semi-passive mode
  • Costly than the Corsair RM Series RM750
 

4 Things to Consider When Choosing a Power Supply

There are many 750W power supplies in the market, and choosing the suitable one for your needs cannot be easy. We’ve managed to pick the best there is to make this whole process easy for you. But if you want other options that are not in our recommendation, here is what to look out for:

Wattage: How much power do you need?

This is the first step when you want to buy a power supply. Purchasing a smaller power supply for high-end gaming rig can lead to problems like frequent shutdowns and instability. Ensure the power supply you are buying if sufficient to power all the components of your PC build, and if possible, cater for future expansions.

The five wattage calculators above can help you determine the wattage that you need for your PC build. All the PSUs featured in this article have 750 watts and can all power an NVIDIA Ampere system.

Efficiency Rating

PSUs are classified according to their efficiency rating, ’80 Plus.’ A power supply can only be certified 80 Plus if it supplies at least 80 percent of its wattage, in this case, 80% of 750W. The rest is lost as heat. The ’80 Plus’ certification ensures PSUs deliver accurate wattage continuously when used.

Depending on your PSU, the efficiency rating can fall in any of the following:

  • 80 PLUS
  • 80 PLUS Bronze
  • 80 PLUS Silver
  • 80 PLUS Gold
  • 80 PLUS Platinum
  • 80 PLUS Titanium

As you go down the list (towards Titanium), the efficiency increases, meaning less heat generated and lower operating temperatures. But also note the price of the PSU increases. An 80 Plus Gold PSU provides the best balance between performance and price. If you want higher efficiency with fewer compromises, go for Platinum or Titanium. For budget PC builds, 80 Plus Bronze certified PSU is the best place to start.

Modularity

Modularity is another vital factor when purchasing a power supply. PSUs come in three types, no modular (direct cable), semi-modular, and full-modular.

  • A non-modular PSU has all the cables pre-installed and permanently attached to the PSU. These PSUs are always cheaper, but cable management is a mess. Also, you can’t use cable mods such as RGB cables.
  • A semi-modular has the essential cables like ATX power, CPU, or PCIe connectors attached to the PSU, with rest as modular. Which cables come attached depends on the manufacturer. Semi-modular PSUs offer the best value with proper cable management and pricing.
  • Fully modular is the best for most users and enthusiasts. These PSUs do not have any cable installed. All cables are removable, allowing you to use only the ones you need, resulting in a clean setup with a lot of clearance for airflow and cooling.

Form Factor

Like motherboard and PC cases, PSUs are also made for different form factors. If you’re building a standard ATX PC, there are many options as most PSUs support the ATX form factor. But for small form factor systems, be careful to choose an SFX or CFX power supply to ensure it fits your case and leave enough headroom.

Frequently Asked Questions

How many watts PSU do I need?

You can easily find the PSU wattage you need for your PC build using an online wattage calculator from Cooler Master, Seasonic, or other PSU makers.

Do I need a new PSU for my Nvidia’s GeForce RTX 3080?

NVIDIA recommends a 750W power supply for the RTX 3080 and RTX 3090. If you have a lower wattage PSU, you’ll have to upgrade to a 750W PSU to enjoy your new GPU.

What is the best PSU for NVIDIA’s next-gen 30-series graphics cards?

We recommend the Corsair RM Series RM750 for most PC builds, and the Seasonic Prime 750W Titanium for extreme and high-end PC builds for overclockers and enthusiasts.

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