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VGA TO VGA – A standard VGA to VGA cable transmits analogue video to legacy monitors, projectors, and computers. Although HDMI and DisplayPort have largely replaced it, they still play an important role in legacy devices. This guide will discuss how VGA works, choosing the right cable for your needs, and some common troubleshooting tips.
What is a VGA to VGA cable?
A VGA (Video Graphics Array) cable transmits analogue video signals from one device to another with a 15-pin VGA port. Unlike HDMI or DisplayPort, VGA is not an audio/video interface; it only supports video.
Key features of a VGA cable:
✔ 15-pin male – 3 rows (Standard interface for VGA devices)
✔ Analog video transmission – no built-in audio support
✔ Has anti-interference shielding – necessary for signal quality
✔ Resolution support – up to 1920×1080 (1080p), but with quality loss at higher resolutions
Uses of VGA to VGA Cables
VGA cables are still found in:
- Older laptops and desktop TFT monitors (a standard configuration in offices and schools)
- Presentation projectors (many of which are still VGA capable)
- Traditional hardware dual monitor setups
- Industrial or embedded systems with VGA interfaces
Note: If your device has an HDMI or DisplayPort interface, choose the latter as it supports higher resolution and quality.
VGA vs HDMI vs DisplayPort: Which should you use?
VGA is an analog standard dating back to 1987; HDMI and DisplayPort standards are digital standards that provide higher resolution and integrated audio capabilities.
| Type | Signal Type | Supports Audio? | Max Resolution | Best For |
|---|---|---|---|---|
| VGA | Analog | ❌ No | 1920×1080 (1080p, but may lose sharpness) | Older devices, projectors |
| HDMI | Digital | ✅ Yes | 4K and beyond | TVs, modern monitors, gaming |
| DisplayPort | Digital | ✅ Yes | 8K+ | High-end monitors, gaming, professional use |
- If both devices only support VGA, use VGA
- Use HDMI or DisplayPort for better quality and convenience.
How do I choose the correct VGA to VGA cable?
If you have no choice but to use VGA, use a high-quality cable for a clearer picture with less interference and signal loss.
✔ Distance – The longer the VGA cable, the weaker the signal. Do not use cables longer than 10 feet (3 meters) unless they are well-shielded.
✔ Look for quality materials
- Gold-plated connectors – prevent corrosion and improve conductivity
- Thick shielding minimizes external noise
- Ferrite cores – tiny cylindrical elements that reduce electrical noise
✔ Ensure compatibility – some newer laptops and graphics processors lack a VGA port so you may need a VGA to HDMI or VGA to DisplayPort adapter
FAQ
1. How do I connect a VGA cable to a monitor?
- Connect one end of the VGA cable to the VGA output of your computer.
- Plug the other end into your monitor’s VGA input.
- If there is no display, check:
- Monitor’s input settings (set to VGA)
- Whether the cable is securely connected
- Display options on Windows/macOS
2. Does VGA support 1080p or Full HD?
Yes, but with limitations, VGA can transmit images at 1920×1080 (1080p). However, due to the analogue nature of the signal, blurring and colour loss may occur when compared to digital signals from HDMI and DisplayPort connections.
3. What are the reasons why a VGA monitor does not work?
Common issues include:
- The cable is not securely connected; check that the plugs on both ends are correctly aligned.
- Incorrect input selection – manually switch the monitor to VGA mode.
- Cable or port problem – use a different VGA cable or a different port.
4. Why can’t I use VGA on a modern laptop or TV?
VGA ports are not standard on most devices today. If your laptop or TV only has an HDMI or DisplayPort port, you can choose a VGA to HDMI adapter or a VGA to DisplayPort converter.
5. Is VGA obsolete?
VGA is now obsolete but is still found in some workstations, schools, and industrial systems. If so, consider upgrading to HDMI or DisplayPort, which offer better image quality and convenience.
Final Thoughts
VGA to VGA cables remain compatible with older monitors, projectors, and legacy devices. However, consider upgrading to HDMI or DisplayPort for improved resolution, image quality, and built-in audio.
Romtronic is a leading manufacturer of high-quality VGA-to-VGA cables and custom cable solutions for the cable assembly industry. Whether you need a standard VGA cable or a customized solution for your unique setup, Romtronic has got you covered.
Need help with custom VGA cables?
Contact us today to discuss your specific requirements and get personalized recommendations from our expert team.
Sam Wu is the Marketing Manager at Romtronic, holding a degree in Mechatronics. With 12 years of experience in sales within the electronic wiring harness industry, he manages marketing efforts across Europe. An expert in cable assembly, wiring harnesses, and advanced connectivity solutions, Sam simplifies complex technologies, offering clear, actionable advice to help you confidently navigate your electrical projects.
