What Happens If Power Supply Is Not Enough For Graphics Card? 

It is essential to be aware of the power requirement of each component of your computer, including those for graphic cards. These power requirements are often listed on the side of the graphic cards, including amperage and wattage. Ideally, the power supply inside the computer must come with a label containing information on its power outputs and ratings. Power supplies matter for graphic cards because they can determine how well or how bad your computer functions. Perhaps you should learn how to monitor power supplies to your graphic cards to help you prevent severe damage or poor performance.

So What Happens if There is Shortage of Power Supply for Graphic Cards

Shortage of power supply for graphic cards can lead to inconsistencies in computer screen displays. The graphics card may eventually turn off the monitor when power gets too low for its operations.

Power Requirements For Graphics Cards- What You Should Know

Graphic cards power consumption is a critical question for all computer users. Today, graphic cards have become one of the most power-hungry computer components. The processing power of graphic cards has increased significantly, and so is their request for more power. Manufacturers of CPU and power supplies have bent towards creating higher efficiency, but power demands for GPUs remain higher.

The main issue with the graphic card’s power consumption is the PCI-Express connection. Today, many graphic cards come with the combination of 6-pin that requires 75W and the 8-pin connectors that require 150W. You can also have the graphic cards with 12-pin connectors that require 500 and 600 W of power.

There have been some modifications in graphic cards to ensure that they conserve power. Depending on your power needs, the 6+2 Pin PCIe connectors have been designed to use both the 6-pin or 8-pin connectors. The 12-pin PCIe connectors, on the other hand, are efficiently fed with power through the use of 12-pin to the 2 x 8 pin adapter.  

What Are The General Symptoms Of Computers Not Receiving Sufficient Power?

Graphic cards may be some of the most power-hungry components of a computer, but the general demand for power should be viewed from the computer’s operations as a whole.

Symptoms of low power supply can vary from subtle issues like graphical downgrades to more severe problems like a computer being unable to turn off. The following are common issues with the unstable power supply to graphics cards;

1. Shutting Down of the Computer

It can be difficult to diagnose issues relating to an unstable power supply to graphic cards. When the power source does not provide sufficient power to the graphics card, the computer may shut down randomly. You will need specific tools to troubleshoot power failures in the computer as a whole.

2. Artifacts Appear and Video Crashes

Irregular power supply to graphics cards may show unexplainable symptoms, but one common symptom is artifacts on the screen. The power supply shortage can cause your video to crash. If your hardware doesn’t receive sufficient power, it may show some symptoms regarding virus infection. A power failure may occur due to power overloading and not just by less supply of power.

3. Burn Out

Irregular power supply to your computer can lead to the burnout of some components in your computer. If you have a graphics card that draws maximum power in watts but doesn’t come with the 6-pin or 8-pin connectors, you will need to use adapters to make the cards compatible.

Burnouts may occur when SATA 8-pin connectors are not present to work with the graphic cards. Overclocking is another problem that can happen when power overload occurs. Burnout often occurs when

Choosing A Compatible Graphics Card That Will Consume Less Power

Most computer owners are unaware of the roles of compatibility in Graphic card power consumption. It is easy to install a new graphics card, but figuring out their compatibility can be tricky. The following are some of the things you should know;

1. Choose Manufacturer Recommended Graphics Card Updates Only

Is your graphics card consuming more power than necessary and still provide poor quality performance? It would be best if you went for recommended upgrades only. If you want more performance with high-resolution graphics, a more powerful graphics card version compatible with your computer is needed.

Most PCs rely on the performance of integrated graphics located inside a chip in the motherboard or in-built in the CPU. PCs also come with a dedicated graphics card that is plugged into the motherboard’s expansion slot.

The location of the graphics card port used in connecting your monitor should tell you what type of graphics card is compatible with the PC. Integrated graphics are those graphics components found in USB and Ethernet. The dedicated graphics are those found in DisplayPort, DVI output, and HDMI.

Whichever graphics card you have, you need a PCI Express or PCIe expansion slot corresponding to the PC case. The PCIe often comes with a removable backplate that sits connections to the graphics card.

2. How do You Know Your Graphics Card is Compatible?

The quickest way to find out your graphics card’s compatibility with your computer and its power demand is to locate the PCI express slot.

There should be few expansion slots on the motherboard of any PC, and they will likely all be PCI express. For the graphic cards, you will need a PCIe x16 slot. Three versions of these slots are available, but they usually are backward compatible.

This also means a modern PCIe 3.0 graphics card should work in a motherboard containing PCIe x16. If you use a lower-grade graphics card, perhaps it will consume more power than necessary, and your PC’s performance will be negatively affected.

You can also use graphic cards’ length and height measurements to determine their compatibilities with your computer. Graphics do come with larger fans, making them twice as thick as the single-height. Most computers are assembled with fans underneath instead of on top of the graphics card. This arrangement also means you will need an unused slot underneath the PCI Express x16 slot to hold the fan.

With this design, you will need an additional 30-40mm space or length to guarantee the card will fit. Keep in mind that some graphics cards have their power socket at the back edge of the body instead of the side. Graphics cards that are lengthier and come with a power socket at the edge will likely consume more power.

Read compatibility contents included in the manual of your graphics cards to be sure you are making the right choices.

3. The Power Requirement

You will always need an extra power supply even if you have a PCIe x16 slot plus lots of extra room. Your graphic cards come with PCIe connectors, but these may be bundled out of the way if no graphics card is fitted.

The PCIe connectors typically come with six pins of the 3×2 arrangement. If your computer doesn’t have these connectors, you should get standard four-pin power connectivity or SATA connectors.

It would be best to be careful with those graphics cards that require two PCIe connectors because each must be connected to a different 12V power supply. It also means you have to connect different adaptors to various sources.

It can be challenging to ascertain how much power your graphics card has, but high-end cards require 600W.

It is entirely wrong to assume that PSU can use more than its maximum power rating continuously. Your computer will likely run into problems if it consumes more than 80% of its total power rating. You may also want to check the power compatibility of the graphics card on the manufacturer’s website.

Manufacturers of graphics cards often provide upgrades to existing components of their products; hence there should be no confusion when upgrading your graphics card. Switching from one graphics card to another option from another manufacturer will not work correctly for you, even if the graphics cards carry the exact specifications and power requirements.


There are certain steps you can take to ensure your computer’s graphics card optimize its power usage, aside from the use of adapters. Opting for modular power supply for the CPU, GPU, and graphic cards. Modular power supply improves the efficiency of power supplied to computer components to let them optimize power.

Not opting for modular power supply means your graphics card will shut down your computer several times. The number of power connectors needed to be connected to your graphics card will determine how well it optimize power supply. Upgrading graphics card may not be an easy thing to do because you need to follow manufacturer recommendations.

Keep in mind that when you upgrade the graphics card, you will have to upgrade other components that work directly with it to avoid conflicts. Regardless of how long or difficult it takes to upgrade your graphics card, it will eventually work it especially as it concerns power supply and usage.

David Huner
David Hunerhttps://yourtechscholar.com
I have completed my graduation from The University of Phoenix. Being a graduate, I’ve been writing on tech tips and products for several years. I love to write about all the latest trends in technology, as well as give my personal take on new products. If you’re looking for some inspiration or just want to read more articles like this one, check out our website!
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