You need a HDMI-to-VGA adapter. Your laptop is outputting an HDMI signal which has to be converted to VGA.


Some connectors are physically different, but use identical signaling - in these cases a passive adapter is sufficient. Passive means there's no signal transformation necessary. It's just two different connectors wired together. For example, DVI-A is just repackaged VGA (aka D-Sub) and they can be passively adapted both ways. Similarly HDMI uses the same signaling as DVI-D, so you can convert between them without any electronics - just wires.

HDMI and VGA are completely incompatible, so you need an active adapter which will decode the HDMI signal and produce equivalent VGA signal.

You may be tempted to use a passive HDMI→DVI adapter and then a passive DVI→VGA adapter, but this won't work. HDMI would be converted into DVI-D, and the second adapter needs DVI-A input. DVI-D and DVI-A use physically compatible connectors, but the signal won't go through.


Note that while active adapters are directional (HDMI→VGA is completely different than VGA→HDMI), passive adapters are usually not. As long as passive adapter's plugs physically fit, it will work in both directions. So for example a HDMI→DVI adapter would work for DVI→HDMI too.

Answer from gronostaj on Stack Exchange
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is a vga cable necessary to connect a monitor to a pc if you already have an hdmi?

Nope not needed.

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I would like to connect a VGA monitor to a new laptop without VGA port...
What's the monitor and native resolution, and which adapter did you get? HDMI to VGA is tricky because it's converting digital to analog. If you can't find your Dell laptop model number, you can put the service tag number here Dell support Lots of options available. USB A to VGA adapter (drivers required), USC-C to VGA adapter/dongle/hub (if your usb-c port supports DisplayPort ALT mode, or a docking station with VGA. More on reddit.com
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trouble adding switching VGA cable for HDMI cable
In my experience, you should always connect multiple monitors to the same source, so I would reccomend plugging in your second monitor into an available slot on your GPU as well, if that is possible. More on reddit.com
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How does a VGA monitor cable work?
A VGA monitor cable transmits video signals in an analog format from the graphics card in your computer to the display monitor. Inside the cable, its pins carry signals for RGB (red, green, and blue) color components, as well as horizontal and vertical sync data. Your monitor converts this analog data into visuals you can see.
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You can, but it’s not the most optimal choice. VGA can handle gaming at lower resolutions and refresh rates, such as 1080p at 60Hz, but struggles to keep up with today’s high-resolution and high-refresh-rate games. If you’re playing older or retro titles, VGA could work fine. For modern, fast-action gaming, though, digital connectors like HDMI or DisplayPort are better, as they support features like higher refresh rates, smoother motion, and greater screen clarity.
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Converters, such as VGA-to-HDMI adapters, bridge the gap between VGA’s analog signal and digital input. They include circuitry that converts the analog video signal carried by the VGA cable into a format that digital devices like HDMI can accept. Some converters also handle audio, bundling video and sound into a single HDMI output. Using a converter opens VGA cables to use on newer devices.
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March 11, 2026 - At greater resolutions, VGA’s ... HDMI or DisplayPort handle high-resolution widescreen displays much better. Yes, many docking stations designed for laptops or workstations include VGA ports....
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reddit.com › r/buildapc › is a vga cable necessary to connect a monitor to a pc if you already have an hdmi?
r/buildapc on Reddit: is a vga cable necessary to connect a monitor to a pc if you already have an hdmi?
June 7, 2018 -

build a gaming pc yesterday that doesn't support vga cables. I have everything plugged in right now and the monitor wont turn on however the gaming pc turns on perfectly. Everythings plugged in great for the monitor except the vga cable. Might that be the issue?

Top answer
1 of 6
61

You need a HDMI-to-VGA adapter. Your laptop is outputting an HDMI signal which has to be converted to VGA.


Some connectors are physically different, but use identical signaling - in these cases a passive adapter is sufficient. Passive means there's no signal transformation necessary. It's just two different connectors wired together. For example, DVI-A is just repackaged VGA (aka D-Sub) and they can be passively adapted both ways. Similarly HDMI uses the same signaling as DVI-D, so you can convert between them without any electronics - just wires.

HDMI and VGA are completely incompatible, so you need an active adapter which will decode the HDMI signal and produce equivalent VGA signal.

You may be tempted to use a passive HDMI→DVI adapter and then a passive DVI→VGA adapter, but this won't work. HDMI would be converted into DVI-D, and the second adapter needs DVI-A input. DVI-D and DVI-A use physically compatible connectors, but the signal won't go through.


Note that while active adapters are directional (HDMI→VGA is completely different than VGA→HDMI), passive adapters are usually not. As long as passive adapter's plugs physically fit, it will work in both directions. So for example a HDMI→DVI adapter would work for DVI→HDMI too.

2 of 6
26

Many people get this the wrong way round.

Signals go from > to

You might think you're connecting your display to your computer, but you're not. You're connecting the computer to the display.

This means your signal goes from the computer to the display - that's an HDMI to VGA connection.

HDMI is a digital format, VGA is an analog format, so any connector you get must be an active connector.

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r/techsupport on Reddit: I would like to connect a VGA monitor to a new laptop without VGA port...
March 2, 2022 -

So I have a new work laptop, and I would like to keep using my old monitor with it as a second screen; but it only has HDMI and USB 2, USB 3, USB C ports...

I did buy a VGA-HDMI converter but it was hardly working at all (the image was atrocious). It could be because I bought a cheap one, but before investing in a 30quids+ one I would like to make sure I am not throwing money away.

Or perhaps there is another option - I honestly do not know. (Get a docking station which connects with an USB?) Any suggestions are very much welcome. Thank you

Here are some of the specifications of the laptop (I could not find a model name; it is a DELL) Processor 11th Gen Intel(R) Core(TM) i7-11850H @ 2.50GHz 2.50 GHz Installed RAM 32.0 GB (31.7 GB usable) System type 64-bit operating system, x64-based processor Pen and touch Touch support with 10 touch points

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EKYLIN VGA Cable, 1.5m/5Feet Male to Male Video Extension Cable Adapter for Computer PC to Monitor Screen Projector with Socket Port ... PANPEO HDMI to VGA Adapter Cable 6ft, Gold-Plated Connectors - Compatible with Laptop, Monitor, Projector, TV, Xbox, Roku
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Answer (1 of 3): Since we do not know the model number and can not see what ports are on the monitor, none of us can guess if it can use a VGA cable, or requires a Display port, and HDMI, or something else. You will need to look at the back of the monitor and see what kind of connectors it has. ...
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VGA Monitor Cables · Pick up and Delivery · Brand · Cable Length (ft) Device Type · Color Family · Rating · All Filters · VGA : Yes · Item: IM1YP3421 · Model: HD2VGAMM6 · 9 · Price is $36.16 · Free delivery by Thu, Apr 23 · 1 · 1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 · 9 · 10 · 11 · 12 · 13 · 14 · 15 · 16 · 17 · 18 · 19 · 20 · 21 · 22 · 23 · 24 · 25 · 26 · 27 · 28 · 29 · 30 · Over 30Add · Compare · Add to list ·