"Need to be equipped with a high-end graphics card when installing an LED screen? Newbie will understand after reading this article! "Fans in the background always ask this question. A few days ago, I met a customer who spent 30,000 yuan to buy a top-end graphics card, but it turned out to be installed on the LED large screen and the screen flashed - is this money unfair? Let’s talk about this today.

​​What is the relationship between graphics card and LED screen? ​ ​
For example, the graphics card is like a chef, and the LED screen is a plate. No matter how good the chef is, he cannot make beautiful dishes without a handy plate. But on the other hand, no matter how high the plate is, it is useless for the chef to not make the spoon. There are three key points that are easy to get stuck:

• ​​Signal transmission​​: It's like the thickness of a water pipe, and the 4K content is transmitted using HDMI 1.4 interface, just like drinking water with a straw - I feel so nervous
• ​​Refresh rate matching​​: The LED screen is flushed to 1920Hz, and the graphics card output is only 60Hz? It's equivalent to having Bolt run in slippers
• ​​Color Management​​: Many graphics card default settings will be overexposed, and the LED screen will be dazzling and cost power.

Last year, I encountered this when I installed a screen in an e-sports hall. The customer insisted on using a flagship graphics card of a certain brand, but the red spilled like tomato sauce. Later, the color gamut mapping of the graphics card was adjusted, which shows that​ ​Hard matching parameters are worse than adjusting​​。

​​Guide to card matching in three major scenarios​​

1. ​​Outdoor advertising screen​​(Brightness above 4000cd/m²)

   • Focus on graphics cards​​Multi-screen output capability​​, for example, three 4K screens are controlled at the same time
   • Recommended graphics cards with DP 1.4 interface, with bandwidth enough to transmit lossless images
   • Case: A business district curved screen uses a mid-range graphics card with six-block partitions, which relies entirely on mosaic splicing technology

2. ​​Stage floor tiles screen​​(with interactive sensing)

   • Must support​​Low latency input​​, the motion capture difference is 0.1 second
   • Video memory is recommended to start with 8G, and loading 3D special effects is not difficult.
   • Lessons of blood and tears: A music festival has caused real-time particle special effects to be PPT due to the overcrowding of graphics card.

3. ​​Sports fence screen​​(IP65 protection)

   • Focus on​​stability​​Instead of performance, work continuously for 12 hours without black screen
   • Dual BIOS design is more reliable, and can quickly cut and backup when encountering thunderstorms
   • Tested data: A stadium uses graphics cards with dual BIOS, and the failure rate has dropped by 67% in three years.

There is an uncommon sense point here: it is not that the larger the video memory, the better. I have installed an 8K guide screen in the mall, and the professional card with 6G video memory is smoother than the 12G video memory game card. Why? because​ ​Video memory type and bandwidth​​More importantly, GDDR6X is more than twice as fast as GDDR5.

​​Five questions about buying and avoiding pitfalls​​

1. "Does HDR support? "——The HDR10 on the LED screen and the HDR on the graphics card must be successfully shaken
2. "With or without hardware calibration? "——Cards with color aberration less than △E<2 can save on later color calibration fees
3. "Radiator size? "——Install in the control room and don't choose three fans.
4. "Is there a frame synchronization interface? "——Multi-screen splicing must be Genlock or frame lock
5. "Does the warranty include a control card? "——Many graphics cards do not guarantee connection to LED control cards

Let’s talk about the actual test cases: a certain brand of graphics card used in an exhibition hall looks beautiful, but because it does not support 10bit color depth, the gradient color has a fault. Later I changed the graphics card with 16bit processing power, and the picture was immediately smooth - so​ ​What the parameter table will not tell you is the real threshold​​。

​​Maintenance and cold maintenance knowledge​​
Don't think it's all done if you install it. I've seen too many good graphics cards that are being tossed and scrapped:

• Use it when cleaning the dust every month​​Compressed air tank​​, ordinary brushes will scratch gold fingers
• The temperature in the control room is maintained at 18-25℃, and the life of the graphics card fan can be extended by 3 times.
• Check the snowflake screen first​​BNC connector​​80% of the bad contact is not bad graphics card
• The backup graphics card needs to be powered on regularly, and the capacitor will become pregnant after being released for a long time (bulge)

There are interesting data sets: the same graphics card has been used in a humid and hot environment in the south for three years, and the failure rate is 40% higher than that in the north. Therefore, it is highly recommended to install the graphics card with the seaside project.​ ​Moisture-proof box​​, the cost is less than 200 yuan, which can save a lot of repair costs.

Now back to the core question: How much should you spend on graphics cards? Personal experience is——​ ​5%-8% of LED screen cost​​The most reasonable budget for a graphics card is reserved. For example, a 200,000 screen is just right for a graphics card of 10,000-16,000. Don’t be fooled by merchants to rush to the top, it’s more practical to leave some budget for color calibration and backup power. After all, no matter how good a graphics card is, it is still a brick when it encounters unstable voltage. Do you think so?

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