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

(*This post may contain affiliate links, which means I may receive a small commission if you choose to purchase through links I provide (at no extra cost to you). Thank you for supporting the work I put into this site!)

Graphics card is one of the most power-hungry components for any computer whether 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, that 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.

It is very important to select proper power supply for your graphics card because if you get and 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:

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.

psu-wattage-pcie-connectors

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 of the 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 website that whether your graphics card needs 6-pin/ 8-pin power connectors or not.

psu-connectors

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 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 may power supplies with higher wattages but very low current on the 12V Rail, so my advice is to avoid these cheap power supplies with lower 12V rail current rating.

psu-voltage-current-table

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 TFX PSU.

Go for Branded

Always go for a branded power supply if you care about the performance and well being 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 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, Thermaltake.

Asses Total Power Consumption of your PC

Lastly, you have to asses 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, 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.

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.

80-Plus-Certification-Ratings

See also:

Ask your Queries here

If you are still unsure of what capacity power supply you should get for your graphics card then you can ask your query here by completely listing your budget, 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.

118 Comments

  1. Derri September 29, 2018
    • Akshat Verma September 29, 2018
  2. Bence Tóth March 24, 2019
    • Akshat Verma March 24, 2019
  3. Win March 25, 2019
    • Akshat Verma March 26, 2019
  4. Win March 26, 2019
    • Akshat Verma March 26, 2019
  5. Win March 26, 2019
  6. Rohit Dhaduk May 28, 2019
    • Akshat Verma May 28, 2019
      • Rohit Dhaduk May 28, 2019
  7. Mar June 28, 2019
    • Akshat Verma June 28, 2019
  8. Daniel Witham July 14, 2019
    • Akshat Verma July 15, 2019
      • Daniel Witham July 15, 2019
  9. Ko Ko July 15, 2019
    • Akshat Verma July 15, 2019
  10. ammar ariff July 21, 2019
    • Akshat Verma July 21, 2019
      • Ammar Ariff July 24, 2019
      • Akshat Verma July 24, 2019
  11. Emad August 14, 2019
    • Akshat Verma August 14, 2019
  12. DinoX August 29, 2019
    • Akshat Verma August 29, 2019
  13. konstadinos mavromatis October 7, 2019
    • Akshat Verma October 7, 2019
  14. Shantanu Bandyopadhyay October 14, 2019
    • Akshat Verma October 14, 2019
  15. Shantanu Bandyopadhyay October 14, 2019
    • Akshat Verma October 14, 2019
  16. Shantanu Bandyopadhyay October 14, 2019
    • Akshat Verma October 14, 2019
  17. Dave October 18, 2019
    • Akshat Verma October 18, 2019
    • Dave October 19, 2019
      • Akshat Verma October 19, 2019
  18. NIZAM KHAN November 5, 2019
    • Akshat Verma November 5, 2019
  19. Albert István Kelemen-Toldi November 13, 2019
    • Akshat Verma November 13, 2019
      • Kelemen-Toldi Albert Istvan November 16, 2019
      • Akshat Verma November 16, 2019
  20. Károly Roland November 23, 2019
    • Akshat Verma November 24, 2019
  21. Onkar kale. November 24, 2019
    • Akshat Verma November 24, 2019
  22. Om kale. November 24, 2019
    • Akshat Verma November 25, 2019
  23. Zaahid November 25, 2019
    • Akshat Verma November 25, 2019
  24. Tegan December 4, 2019
    • Akshat Verma December 4, 2019
  25. Jacob December 15, 2019
    • Akshat Verma December 15, 2019
      • Jacob December 15, 2019
      • Akshat Verma December 15, 2019
  26. Phil December 21, 2019
    • Akshat Verma December 21, 2019
  27. Phil December 22, 2019
    • Phil December 22, 2019
      • Akshat Verma December 22, 2019
    • Akshat Verma December 22, 2019
  28. Carl December 23, 2019
    • Akshat Verma December 24, 2019
  29. Mark February 7, 2020
    • Akshat Verma February 7, 2020
      • Mark February 7, 2020
      • Akshat Verma February 7, 2020
  30. kers99 February 7, 2020
    • Akshat Verma February 7, 2020
  31. Ace February 8, 2020
    • Akshat Verma February 8, 2020
      • Ace February 17, 2020
      • Akshat Verma February 17, 2020
  32. mz February 9, 2020
    • Akshat Verma February 9, 2020
  33. mz February 9, 2020
    • Akshat Verma February 10, 2020
      • mz February 10, 2020
      • Akshat Verma February 10, 2020
  34. MZ February 10, 2020
  35. Kelley February 13, 2020
    • Akshat Verma February 13, 2020
      • Kelley February 13, 2020
      • Akshat Verma February 13, 2020
  36. Kelley February 13, 2020
    • Akshat Verma February 13, 2020
      • Kelley February 14, 2020
      • Akshat Verma February 14, 2020
  37. Kelley February 15, 2020
    • Akshat Verma February 15, 2020
  38. ghost February 16, 2020
    • ghost February 16, 2020
    • Akshat Verma February 16, 2020
      • ghost February 16, 2020
      • Akshat Verma February 16, 2020
      • ghost February 16, 2020
      • Akshat Verma February 16, 2020
  39. 5930 February 17, 2020
    • Akshat Verma February 17, 2020
      • 5930 February 17, 2020
  40. Paramjeet February 29, 2020
    • Akshat Verma February 29, 2020
      • Paramjeet February 29, 2020
      • Akshat Verma February 29, 2020
  41. Paramjeet February 29, 2020
    • Akshat Verma February 29, 2020
  42. Paramjeet February 29, 2020
    • Akshat Verma February 29, 2020
  43. Oscar March 28, 2020
    • Akshat Verma March 28, 2020
      • Oscar March 28, 2020
      • Akshat Verma March 28, 2020
  44. Oscar March 28, 2020
    • Akshat Verma March 28, 2020

Leave a Reply