How to Find Right Power Supply for Graphics Card [Detailed Guide] (2022)

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How to Find Right Power Supply for Graphics Card [Detailed Guide]

(Video) Beginners Guide to Power Supplies... How to understand the ratings

Akshat Verma Last Updated: June 12, 2022 How To Guides

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Graphics card is one of the most power-hungry components for any computer whether a gaming PC or a work PC. The power requirements of a graphics card depend on the GPU model used, because graphics cards with budget or entry-level GPUs consume less power, whereas mid-range and higher-end GPUs need significantly more power to operate. Entry-level or budget mid-range graphics cards draw their power from the motherboard’s PCI-E x16 slot only, which can provide up to 75W of power to the graphics card, whereas powerful mid-range and high-end graphics cards are more power-hungry and require additional power from the PSU or Power Supply Unit in form of 6-pin and 8-pin PCIe connectors for their working.

(Video) All Power Supply Cable Types EXPLAINED

It is very important to select the proper power supply for your graphics card because if you get an underpowered PSU then it will not be able to supply enough power to your graphics card and other components, causing restarts or can burn out too, and may cause damage to your other computer components including the video card. On the other hand, if you get a higher wattage or overpowered power supply then it will be just a waste of your money. Therefore, it is very important to find a proper balance between price and power consumption, so that you can buy the right power supply for your graphics card. So, here in this post, I am going to guide you on how you can choose a proper power supply unit (PSU) for your graphics card.

Check out:

  • Best Budget Power Supply for Graphics Cards
  • Best Power Supply for High-end Graphics Cards

How to Choose Proper PSU for Graphics Card

Here are the most important things that you must consider when getting a new PSU for your new graphics card.

Check Graphics Card Power Consumption

The first and foremost thing to do is to check your GPU or graphics card power consumption specified by the manufacturer on their website. All the GPU manufacturers or graphics card manufacturers list the power consumption and the recommended power supply for their graphics cards. For example, below you can see the recommended PSU for the Gigabyte GeForce GTX 1060 G1 Gaming 6G graphics card on Gigabyte’s website. The recommended PSU specified for this card is 400W. You can look for this information for the graphics card you have or that you are going to buy. This will give you some idea about the wattage of the PSU that you will need for your graphics card or whole PC.

How to Find Right Power Supply for Graphics Card [Detailed Guide] (1)

6-pin/8-pin PCI-E Power Connectors

If your graphics card requires external power connectors such as 6-pin or 8-pin PCIe connectors then you have to buy a power supply with these connectors included in it. Most budget-level graphics cards do not require external power from the PSU but powerful mid-range and high-end graphics cards do require 6-pin/8-pin PCI-E power connectors from the power supply. Also, it is better to buy a PSU with 6-pin/8-pin connectors even if your graphics card does not need them, because of future expansion. You can check this info on the graphics card manufacturer’s website whether your graphics card needs 6-pin/ 8-pin power connectors or not.

How to Find Right Power Supply for Graphics Card [Detailed Guide] (2)

(Video) How to Pick the Correct Wattage Power Supply

Check out: Best Low Power Graphics Cards without External Power

Look for Current on 12V Rail

Technically, the most important thing to look for in a PSU is the amount of current present on the 12V rail. 12 Volt Rail is the most important and it is the one that provides power to your main components that include a graphics card, processor, motherboard, hard drives, fans, etc. If you do not have sufficient current on the 12V rail of your power supply then you can face serious performance issues, restarts, and may end up burning your power supply and causing damage to your precious and expensive components. For a 400W PSU, it should be at least 30A, 40A for 500W, and so on. I am telling you this because I have seen many power supplies with higher wattages but very low current on the 12V Rail, so my advice is to avoid these cheap power supplies with a lower 12V rail current rating.

How to Find Right Power Supply for Graphics Card [Detailed Guide] (3)

Tip: It is better to get a PSU with a single 12V rail over multiple or dual 12V rails because it is said that a single 12V rail provides better overall stability under heavy load.

Form Factor or Computer Case Size

Make sure the power supply you are getting should be able to fit in your computer case because you really don’t want to face such issues afterward. For a normal ATX cabinet, a normal ATX PSU is good but for some mini-ITX cases, you need an SFX PSU and for slim low profile cases, you need a TFX PSU.

Go for Branded

Always go for a branded power supply if you care about the performance and lifespan of your computer components. Cheap Unbranded Chinese power supplies may attract you at first, but in the end, they are nothing but trouble. Branded PSUs may cost a little higher but they are very reliable and provides you with accurate current, voltage, and power that are needed for the long life of your PC hardware components. Some of the good brands of power supplies are Seasonic, Corsair, Cooler Master, Antec, EVGA, and Thermaltake.

Assess the Total Power Consumption of your PC

Lastly, you have to assess the total power consumption of your PC if you have more hard disks or case fans installed in your PC. You can do this by using power supply calculator tools available online or can ask here. If you have a normal PC with two case fans, and two hard drives then you can go with the same wattage power supply that is recommended by the graphics card manufacturer on their website. If you have extra components installed then you can add 100W to the PSU wattage which is recommended by your graphics card manufacturer.

(Video) How To Choose A Power Supply [Simple] - The Ultimate Guide

Check out: Best Fanless PSUs for Building Silent PC

80 Plus Certification Rating

This is really not an important factor but if you have an 80 Plus Certification power supply then it will be more power-efficient compared to the ones without it. This means your PSU will draw less power compared to the PSU with the same wattage. The various 80 Plus certification ratings in decreasing order for a power supply are 80 Plus Titanium, 80 Plus Platinum, 80 Plus Gold, 80 Plus Silver, 80 Plus Bronze, and 80 Plus White.

How to Find Right Power Supply for Graphics Card [Detailed Guide] (4)

See also:

  • Find out what power supply do you have in your PC
  • PSU Fan Orientation (Up or Down)? Find Answer here

Queries?

If you are still unsure of what capacity power supply you should get for your graphics card then you can ask your query by completely listing your budget and PC specs including the model of your graphics card. I will be happy to recommend you the best PSU for your graphics card or gaming needs.

About The Author

How to Find Right Power Supply for Graphics Card [Detailed Guide] (5)

(Video) Finding the Right Power Supply - A Step-by-Step PSU Guide (Beginner Friendly!)

Akshat Verma

I am a PC Gamer and a Hardware Enthusiast. I love Graphics Cards and I have been digging them since GeForce 3 series. I have done M.Tech in IT and B.E. in Computer Science & Engineering.

FAQs

How do you match a power supply to a GPU? ›

How to check Compatibility between your PSU, GPU, and Case.
  1. Identify the make and model of your PSU or Case. ...
  2. Go to pcpartpicker.com and search for your PSU or Case.
  3. Select your PSU or Case from the search results.
  4. On the product page, scroll down until you see "Compatible Parts"
7 Jan 2015

How do I know if my power supply is compatible with my graphics card? ›

The power requirements for each graphics card are listed on the side of the package, including the wattage and amperage. The power supply inside your PC should have a label with is output and ratings. In this example, this 750 G3 power supply has a single +12v rail rated for 62.4A.

How do I know what power supply I need? ›

The best power supply for your PC build is the one that provides the right amount of wattage to all components simultaneously. Manually calculating this requires that you multiply the total amps of all components by the total volts of all components. The result is the total watts that your PC build requires.

What power supply do I need for RTX 3070? ›

NVIDIA recommends a 650W PSU for the RTX 3070, but if you're currently working with, say, a 600W PSU, you might get along just fine depending on other hardware in your system.

What can a 750w PSU handle? ›

Using a 750 watts PSU, you can install two RTX 2080s an Intel Core i7 overclocked processor, and your computer will perform just fine.

Is 800w enough for RTX 3080? ›

An RTX 3080 requires a minimum of 750 watts power supply. If you plan to overclock your RTX 3080 or run it at high settings, we recommend a power supply of 850 watts or higher. The RTX 3080 is a very power-hungry card and will need a suitable power supply to run it at its best.

Can I use a PCIe 4.0 GPU in a 3.0 slot? ›

PCI-Express versions are backward compatible, meaning that you can use a PCIe 4.0 graphics card or storage device on a PCIe 3.0 or PCIe 2.0 system. However, PCI-Express will use speeds based on the lowest of the two versions for communication.

How do I match my power supply to my motherboard? ›

If you are checking for a motherboard, click on “view compatible power supplies”. If you are on the product page of a PSU, click on “view compatible motherboards”. You will now find a list of all the compatible PSUs for a motherboard or vice-versa.

Will any PSU work with any motherboard? ›

Most motherboards are either micro-ATX or ATX, which any ATX power supply will work with.

What are the 5 factors to consider when selecting a power supply? ›

You need to consider form factor, efficiency, amperage, protection, and the cables you're going to need, along with any other features you are looking for. A good power supply can last for many years and can have a huge impact on the efficiency of your PC, so take the time to choose wisely.

What happens if PSU is too weak? ›

The power supply unit (PSU) is one of the essential components of a computer. If it's underpowered or too weak, it can cause several different problems to your system, such as random program crashes, unexpected shutdown & restart, system freezes, video errors, complete shutdown, and the blue screen.

Which PSU is best for gaming? ›

The best power supply for PC gaming
  1. Corsair RM750x (2021) The best power supply for high-end graphics cards. ...
  2. Seasonic Prime Titanium TX-1000. The best 1KW power supply. ...
  3. Corsair CX450. The best cheap PSU. ...
  4. XPG Core Reactor 650W. The best 650W power supply. ...
  5. Corsair AX1600i. ...
  6. Fractal Design Ion SFX 650 Gold.
30 Jun 2022

Is 750W enough for 3070? ›

The minimum power you need to run the RTX 3070 should be about 500W. That's in case if you have a 65-75W CPU. Together, the whole system should peak at about 350-370W, which means even a 450W PSU could be fine. But, just to be safe, we recommend a minimum of 500W.

What PSU do I need for RTX 3080? ›

NVIDIA recommends the best PSUs to be at least 750W for the RTX 3080, which is where we will focus here. EVGA's SuperNOVA P2 has 750W of power and comes at a competitive price for what you're getting. It has an 80 Plus Platinum efficiency certification, meaning it should run at about 92% efficiency when at half load.

What PSU should I get for RTX 3060? ›

Recommended 450–750 Watt PSU: Corsair SF Series.

Is 750W enough for RTX 3060? ›

NVIDIA recommends at least a 550 W PSU for the RTX 3060. However, considering different AIB versions of the card (some of which are overclockable) and PSU efficiency figures, you would be better off with a 650 W PSU, which is our focus here.

Is 850w enough for 3080 TI? ›

850w is fine, just make sure it's a good brand psu such as Seasonic, Super Flower or the upper tier Corsair/EVGA psu's.

Will a 750W PSU be enough for a 3090? ›

Most 3090 cards will need two 8 pin aux power connectors. A quality 750w psu can likely do the job. If you buy a factory overclocked card with 3 8 pin connectors, that could add up to 150w to your needs.

What PSU do I need for RTX 3090? ›

Nvidia recommends a minimum PSU size of 850 watts, which is a 100 watt increase over the original GeForce RTX 3090 requirement.

Is 1000W enough for 3090? ›

We Suggest 80 Plus Gold 1000W and above PSUs for NVIDIA GeForce RTX 3090 Ti.

Do I need more than 850W power supply? ›

For most PC builds

A large portion of PCs requires only 850W of power headroom for full loads. Even with a capable NVIDIA GeForce RTX 20-series GPU and AMD Ryzen 9 or Intel Core i9 processor will likely not require more than half of this capacity.

Is PCIe Gen 4 worth it? ›

Is PCIe 4.0 Worth It for Gaming? It is worth the upgrade to PCIe 4.0 for gaming if you: Use the fastest NVMe storage devices for loading games, which will make use of the speed. Have a PCIe 4.0 graphics card, which may see a slight performance improvement.

Does PCIe 4.0 matter for GPU? ›

The higher bandwidth of PCIe 4.0 and 5.0 may also benefit graphics cards, as higher throughput helps allow quicker transfer of data to VRAM. But while PCIe 4.0 setups outperform 3.0 in synthetic benchmarks, the real-world benefits for gaming are currently minor.

Can you put a PCIe 4.0 card in a 5.0 slot? ›

Similarly, once the PCIe 5.0 interface is widely adopted, you'll be able to insert a PCIe 4.0 expansion card into a PCIe 5.0 motherboard's slot, but you'll be limited by the speeds of PCIe 4.0.

Will any PSU fit my computer? ›

Do all PSU fit all cases? Most ATX cases will fit perfectly with almost all cases. As long as your PSU has the standard dimensions, 150 × 86 × 140 mm, it will fit into any standard case. However, you might face an issue if you have a slim case since it's not compatible with all the power supplies.

What are the 3 types of computer power supply? ›

All power supply cabling comes in three styles: modular, semi-modular, and pre-installed. Modular power supplies save space by allowing users to connect the minimum amount of cables for each device.

Do I need both 8 pin and 4 pin? ›

You do not have to plug that extra 4 pin CPU power connector on the board. The 8 pin is more than enough for running the system. You're totally fine without it. If you're upgrading to a RTX 3070 or 3080 and a Ryzen 5600X your 650 Watts should be enough since it's a good model.

Can PSU destroy motherboard? ›

Protect Against Power Surges

The motherboard is where your computer's power supply unit (PSU) is connected. It's important to buy the right PSU for your needs—if your components need more power than the PSU can provide, it will cause the components or the motherboard to fail.

Can I use a 4 pin in a 8 pin motherboard? ›

If your power supply only has a 4-pin connector, it's still quite likely that you can use it in an 8 pin port. If compatible then it will go in on "one side" of the 8-pin connector. This will likely give enough power, but beware over-clocking.

How do I know if my power supply is failing? ›

Signs of power supply failure
  1. Power-on Fails (system fails to start or lock ups)
  2. Spontaneous Rebooting.
  3. Intermittent lock ups during applications.
  4. Hard drive and fan fail to spin up simultaneously (+12 failure)
  5. Overheating of power supply due to fan failure.
  6. Small brownouts that cause the system to fail and restart.
31 Mar 2022

How do I know if my power supply is true rated? ›

The most efficient PSUs are the ones that come with an 80 Plus rating, which is assigned by an independent certifier. Even in 80 Plus PSUs, there are different levels: 80 Plus, 80 Plus Bronze, 80 Plus Silver, 80 Plus Gold, 80 Plus Platinum, 80 Plus Titanium. (These are ordered from worst to best.)

How many watts should my PSU be? ›

But even with several hard drives and a decent Intel or AMD CPU, a 750W power supply is sufficient for most single GPU configurations. For multi-GPU systems, we typically recommend at least a 1000W or more. If you're unsure of the best PSU for your config, we recommend using an online PSU calculator.

What happens if power supply is not enough for graphics card? ›

What happens if your Power Supply is too weak for your GPU or PC? Well, best-case scenario, your PC or GPU will just underperform. Most likely, though, it'll crash outright – and worse.

Can faulty PSU damage GPU? ›

Can a faulty PSU damage your GPU? Yes. The thing is, it won't damage your GPU instantly and other pc parts can get damaged too by a faulty PSU(if you are lucky). It can slowly but surely fry your whole pc and even possibly shock you.

How long does a PSU last? ›

How Long Does a PSU Last? Under normal intended use, a PSU should last a long time—at least five years, possibly up to 10 years if you're lucky. But if you start putting the power supply under high loads over long periods, it can be overstressed.

Does power supply affect FPS? ›

Yes, a PSU can cause an FPS drop when the PSU can't provide enough power required by your system. It usually happens if the PSU has lower wattage than what's required by the computer or if the PSU or PSU cables are defective and can't provide stable voltage.

How much watt PSU do I need for gaming? ›

The fact of the matter is that most mid-range gaming PC builds can run on 450-600W PSUs, depending on the GPU, with a good deal of them landing ideal wattage around the 500-550W range.

What power supply does a GTX 1080 need? ›

Minimum 500 W or greater system power supply with one 8-pin PCI Express supplementary power connectors. Prior to unpacking your new NVIDIA® GeForce® GTX 1080 graphics card, it is important to make sure you meet all the system requirements listed on page 2 for a smooth installation.

Can a 750W PSU handle a 3070 TI? ›

Yes. According to Nvidia you should be fine with a 750w psu.

How many watts does 3070 need? ›

The GeForce RTX 3070 consumes around 220W on the Founders Edition to quickly refresh your memory with factory-overclocked SKUs boosting up to around 240-250W.

Can a 3070 run on 850W? ›

A high quality 850w would be ok.

Will a 600w PSU be enough for 3080? ›

Nvidia recommend a 750w minimum for the 3080 in an everyday system, so 600w will not be sufficient to leave headroom for other hardware components.

How much power does a 3080 draw? ›

It's not the most power-hungry graphics card we've ever tested, but the MSI 3080 12GB Suprim X can draw quite a bit of power. It averaged 384W in both FurMark and Metro Exodus, about 25W more than the 3080 Ti and 3090 Founders Edition cards, and over 50W more than the 3080 10GB.

Is 750W enough for RTX 3080 Reddit? ›

Yes. My 12700 averages about 80W when playing games and the 3080 will max out around 390 before an undervolt. Throw in another 120W for system components, fans etc.

Is 650W enough for RTX 3070? ›

NVIDIA recommends a 650W PSU for the RTX 3070, but if you're currently working with, say, a 600W PSU, you might get along just fine depending on other hardware in your system. You can always give it a shot before picking up a new PSU.

How many watts does a 3060 require? ›

Nvidia rates the GeForce RTX 3060 TGP (Total Graphics Power) at 170W, making it the lowest power Ampere GPU by 50W. It has a single 8-pin power connector, and combined with the x16 PCIe slot that's enough for up to 225W of power — more than sufficient headroom for overclocking.

Is 450W PSU enough for GTX 1660 Super? ›

Yes it can, but you should choose a 750W PSU for enough overclocking headroom and for RGBs and your HDDs. How many watts power supply is needed for a build with a Ryzen 5 3600 and a GTX 1660 Super?

How do I know which power supply is compatible with my motherboard? ›

If you are checking for a motherboard, click on “view compatible power supplies”. If you are on the product page of a PSU, click on “view compatible motherboards”. You will now find a list of all the compatible PSUs for a motherboard or vice-versa.

How much power supply do I need for GTX 1660? ›

Here is our power supply recommendation: GeForce GTX 1660 - On your average system we'd recommend a 450 Watt power supply unit.

Does a power supply have to be compatible? ›

Most motherboards are either micro-ATX or ATX, which any ATX power supply will work with. That said, if you can tell me the model of PC you bought from Best Buy, then I can probably find out what motherboard you have just to be sure.

Does any power supply fit any computer? ›

For the vast majority of desktop PC users, standard ATX power supplies should be fine, though you'll still want to make sure your PSU will fit in your case by checking the appropriate clearances. If you're a small form factor PC (SFF) enthusiast, you'll want to do a little more research to make sure your PSU will fit.

Do all PSU fit all motherboards? ›

The short answer is yes, but the long answer is no... not all mother boards and power supplies are compatible... but as a pc builder you're going to be dealing with ATX motherboards most of the time if not all the time... just make sure your power supply is ATX compliant.

What are the 3 types of computer power supply? ›

All power supply cabling comes in three styles: modular, semi-modular, and pre-installed. Modular power supplies save space by allowing users to connect the minimum amount of cables for each device.

What power supply do I need for gaming PC? ›

Many modern gaming systems with a 6 or 8-core CPU and a midrange to high-end graphics card should get by with a 650W to 850W power supply, with 750W being a long-time sweet spot for gamers. More powerful hardware requires higher wattages, especially if you plan on overclocking.

What is good GPU power? ›

Component Power required The central processing unit (CPU) 55 – 150 Watts Graphics card (GPU) 25 – 350 Watts Hard disk drive 0.7 – 9 Watts Solid-state drive 0.6 – 3 Watts Table of contents …
...
How Many Watts Does Gpu Use?
Graphics CardGPU FPS (9 Games)GPU Power (Watts)
RX 570078.4165.8
RX 6800 XT142.8303.4
2 more rows
7 Apr 2022

Which PSU is best for GTX 1660 Super? ›

GeForce GTX 1660 SUPER - On your average system we'd recommend a 450 Watt power supply unit.

Can a 450W PSU handle a 1660? ›

The Recommended System Power based on Nvidia for 1660 super is 450W and ryzen 2600 is not a power hungry cpu anyway , you wont have any problem installing the 1660 super. 1650 super can run even with a 350W PSU. Overall the 1660 super its a faster GPU and will perform better.

Can a power supply ruin a motherboard? ›

Most power supply units and motherboards adjust their voltages to accommodate small power surges. But if it's a big one, it can fry your motherboard and all the components connected to it.

Are all PC PSU the same size? ›

ATX PSU's only vary by the LENGTH. *All you need to do is check that the PSU is no longer than 140mm.

How many watts should my PSU be? ›

But even with several hard drives and a decent Intel or AMD CPU, a 750W power supply is sufficient for most single GPU configurations. For multi-GPU systems, we typically recommend at least a 1000W or more. If you're unsure of the best PSU for your config, we recommend using an online PSU calculator.

What kind of power supply do I need for a RTX 3060? ›

Recommended 450–750 Watt PSU: Corsair SF Series.

What power supply is needed for a 3090? ›

Nvidia recommends a minimum PSU size of 850 watts, which is a 100 watt increase over the original GeForce RTX 3090 requirement.

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