Best monitors to use with a CGA to VGA converter compared (2026)

A classic CGA computer cannot drive a modern monitor on its own, so a converter sits between the two and turns the old 15.75 kHz signal into standard VGA. The best monitors to use with a cga to vga converter are 1080p screens with a real VGA input, a 4:3 aspect mode, and a steady image at 60Hz for classic games and text.

Quick verdict on the best monitors to use with a cga to vga converter

A converter does the hard work of turning a 15.75 kHz CGA signal into standard VGA, so the monitor only needs a VGA input, a 4:3 aspect mode, and a calm image at 60Hz. The seven models in this guide all meet that bar, and they differ on stand adjustment, built-in sound, and refresh rate.

The HP 24mh leads this list as the most complete retro pick. Its 23.8-inch IPS panel runs at 1920 x 1080, it carries VGA, HDMI, and DisplayPort inputs, and it has built-in speakers, which matters because a CGA-era computer has no HDMI audio to lean on. HP lists a 5 ms gray-to-gray response time and a 60Hz refresh rate at full resolution in its own datasheet, and the 178-degree viewing angles keep the image steady when the screen sits off to the side of a retro desk.

The BenQ GW2480 is the pick for buyers who care most about the shape of the picture. Its on-screen Display Mode scales the image to Full, Aspect, 1:1, or Overscan, so a 640 x 200 or 640 x 480 frame from the converter can sit in true 4:3 with black bars instead of stretching wide. The Dell P2219H is the pick for a smaller desk, with a 21.5-inch panel and a fully adjustable stand, while the ASUS VA24EHE and the LG 24MP400-B bring 75Hz refresh rates over HDMI for modern use alongside the converter.

The Acer R240HY and the AOC 24B2XH close the list with the fastest maker-listed response times here, 4 ms gray-to-gray on both, which suits fast scrolling text and arcade-style games. Every model in this guide has a genuine VGA input, so the chain stays simple: the old computer feeds the converter, the converter feeds the monitor, and no second adapter is needed.

Quick comparison table

Use this table to narrow the list before the detailed sections. It shows the panel, resolution, refresh rate, response time by type, and the trait that sets each model apart for retro use after a CGA to VGA converter, and every model here carries a real VGA input.

All seven models are 1080p IPS panels with a VGA input, so any of them accepts the standard VGA signal a converter outputs. Response times are stated exactly as each maker labels them, and a 60Hz figure over VGA is normal here because the converter itself outputs at 60Hz.

How we selected

A monitor earns a place in this guide only when it fits the converter chain, not when it is merely a good modern screen. The converter handles the old CGA timing, so the monitor is judged on its VGA input, its ability to hold a 4:3 image, and its behavior at 60Hz, which is the rate a converter outputs.

Every model here has a genuine VGA input listed by its maker, a 1920 x 1080 IPS panel, and a maker-listed response time of 8 ms gray-to-gray or faster. Aspect control was weighed heavily, because a 640 x 200 CGA frame stretched across a 16:9 panel looks wrong, and a monitor that can hold the 4:3 shape with black bars preserves the original look. Refresh rate mattered less than usual, since the converter outputs at 60Hz and a 75Hz ceiling only helps when the same screen later serves a modern computer.

Spec figures come from maker datasheets, leaflets, and manuals, not from retail listings. Where a retail listing disagrees with the maker figure, the maker figure is used and the conflict is stated in the model section, so no number here rests on a store page alone. Response times are always labeled by type, because a 1 ms MPRT figure and a 1 ms GtG figure describe different behavior, and none of the seven makers publishes a millisecond input lag figure for these models, so no input lag number appears in this guide.

No monitor in this guide accepts a raw CGA signal, and none claims to. A CGA output runs at a 15.75 kHz horizontal scan rate that no modern flat panel accepts directly, so the converter is not optional, and any guide that lists a modern monitor as a direct CGA display is wrong. The honest question is which VGA monitor behaves best once the converter has done its job, and that is the question this guide answers.

The monitors for a converter setup

Every model in this section is a real 1080p monitor with a maker-listed VGA input and a response time of 8 ms gray-to-gray or faster. Each section states the response time exactly as the maker labels it, so figures from different makers are never mixed up.

HP 24mh

The HP 24mh is the most complete retro pick in this guide, and its spec sheet reads like a checklist for a converter setup. The 23.8-inch IPS panel runs at 1920 x 1080, HP lists a 5 ms gray-to-gray response time, and the inputs cover VGA, HDMI, and DisplayPort, so the converter takes the VGA port while a modern computer keeps HDMI free.

One conflict is worth stating. HP’s own datasheet lists the maximum resolution as 1920 x 1080 at 60Hz, while some retail listings and third-party manual pages claim 75Hz for this model. This guide uses the maker datasheet figure of 60Hz, because the datasheet is the structured spec record, and 60Hz is exactly what a converter outputs, so nothing is lost in practice. The datasheet also lists low resolutions such as 640 x 350, 720 x 400, and 800 x 600 among its supported modes, and the horizontal scan range of 30 to 86 kHz covers the 31.5 kHz line rate of a 640 x 480 signal at 60Hz.

Built-in speakers are the practical win here. A CGA-era computer has no digital audio path, so a monitor without speakers forces a separate speaker setup for games and demos that use sound. The HP 24mh carries two built-in speakers, and its height-adjustable stand helps line the screen up with the keyboard on a retro desk. The 178-degree viewing angles from the IPS panel also matter, because a retro setup often sits in a corner or on a side table where the screen is viewed at an angle.

The trade-off is the refresh rate ceiling. At 60Hz this monitor will never show the smoother motion of a 75Hz panel when it serves a modern computer, and buyers who plan to use the same screen daily for modern work may prefer the ASUS or LG models. For a desk where the converter is the main job, the HP 24mh is the simplest complete answer: one VGA cable from the converter, sound from the monitor, and a sharp 1080p image.

BenQ GW2480

The BenQ GW2480 is the pick for buyers who care most about the shape of the picture, and its on-screen Display Mode is the reason. The manual lists Full, Aspect, 1:1, and Overscan options, so a 4:3 frame from the converter can sit in its true shape with black bars at the sides instead of stretching to fill the 16:9 panel.

That control matters more than it sounds. CGA games were drawn for a 4:3 screen, and stretching them to 16:9 makes circles into ovals and text into a wide smear, which breaks the look the converter is trying to preserve. The Aspect setting scales the image to the largest 4:3 frame that fits the panel, and the 1:1 setting shows the converter output pixel for pixel, which suits buyers who want the sharpest possible text in a smaller window. Few monitors at this tier expose the control so plainly, and the BenQ puts it in the main picture menu.

The panel itself is a 23.8-inch IPS unit at 1920 x 1080 with a 60Hz refresh rate and a maker-listed 5 ms gray-to-gray response time. Inputs cover VGA, HDMI, and DisplayPort, and BenQ includes a VGA cable in the box, so the converter chain needs no extra cable purchase. Brightness is listed at 250 nits with a 1000:1 native contrast ratio, and the 178-degree viewing angles hold color steady from the side.

The GW2480 is also an eye-care focused design, with low blue light modes and a flicker-free backlight, which helps during long sessions with old software that keeps bright text on screen for hours. The stand only tilts, with no height adjustment, so buyers with a high desk may need a riser or a VESA arm to reach a comfortable eye level. For buyers who want the truest 4:3 image after the converter, the BenQ is the strongest choice in this guide.

Dell P2219H

The Dell P2219H is the pick for a smaller desk, and it is the only model here under 24 inches. The 21.5-inch IPS panel runs at 1920 x 1080, which gives a higher pixel density than the 23.8-inch models, so text from the converter looks crisper at the same viewing distance.

Dell lists an 8 ms response time in Normal mode and 5 ms in Fast mode, both gray-to-gray, and the inputs cover VGA, HDMI, and DisplayPort. The Dell user’s guide also gives this monitor an Auto Adjust function that only works over the analog VGA input, which is a small but real advantage for a converter setup: the monitor can self-adjust the picture position and clock to the converter signal at the press of a button, instead of leaving the buyer to tune the image by hand.

The stand is the best in this group, with height, tilt, swivel, and pivot adjustment, so the screen lines up with the keyboard exactly and can even rotate to portrait for long listings or code. Dell also includes a USB 3.0 hub, which suits a desk where the same screen serves a retro machine through VGA and a modern laptop through DisplayPort. The 5.62 mm top and side bezels keep the frame slim for a monitor of this age.

The trade-off is size. A 21.5-inch panel shows a 4:3 frame smaller than a 23.8-inch panel does, because the black bars take a larger share of a smaller screen, and buyers who want the biggest retro image should look at the HP or BenQ models instead. The P2219H is also an older design that is now mostly found as remaining stock or refurbished, so buyers should confirm the exact model suffix before ordering. For a compact retro desk, it remains a strong and honest pick.

ASUS VA24EHE

The ASUS VA24EHE is the pick for buyers who want the converter screen to double as a modern 75Hz display. The 23.8-inch IPS panel runs at 1920 x 1080, ASUS lists a 5 ms gray-to-gray response time, and the maximum refresh rate is 75Hz, though the VGA input tops out at 60Hz while HDMI reaches 75Hz.

That split is worth understanding. ASUS lists a digital signal range of 48 to 75Hz and an analog signal range of 48 to 60Hz, so the 75Hz ceiling is real but it only applies to HDMI and DVI, not to the VGA input the converter uses. For retro use that changes nothing, because the converter outputs at 60Hz, and for modern use it means smoother scrolling and video when the same screen serves a current computer. Adaptive-Sync support also comes with the panel, which reduces tearing from modern sources.

The VA24EHE carries three inputs, HDMI, DVI, and VGA, and ASUS includes a VGA cable in the box. The panel covers 178-degree viewing angles with a 1000:1 contrast ratio and 250 nits of brightness, and ASUS adds its GamePlus overlays and Splendid picture presets, which are harmless extras for retro use. The stand tilts only, with no height adjustment, and the monitor has no built-in speakers, so sound needs a separate setup.

One more detail deserves a note. The ASUS manual lists an Aspect Control setting in the image menu with Full and 4:3 options, so a 4:3 frame from the converter can be held in its true shape. Buyers who want the fastest modern refresh rate in this group without giving up the VGA input should start here, and buyers who need built-in sound should look at the HP 24mh instead.

LG 24MP400-B

The LG 24MP400-B is the pick for buyers who want a modern-looking screen with FreeSync support alongside the converter. The 23.8-inch IPS panel runs at 1920 x 1080, LG lists a 5 ms gray-to-gray response time in its Faster mode, and the three-side virtually borderless design keeps the frame slim on three edges.

The refresh rate needs a careful note. LG lists a 75Hz maximum, but the D-Sub VGA input tops out at 1920 x 1080 at 60Hz, with 75Hz available only over HDMI. That matches the converter chain exactly, since the converter outputs at 60Hz, but buyers should not expect 75Hz from the VGA input, and the distinction is stated in the LG spec sheet rather than hidden in fine print. FreeSync support also applies to the HDMI input, so it helps modern gaming on the same screen but does not change the converter picture.

LG adds its Dynamic Action Sync and Black Stabilizer features, which are aimed at modern games, and a Reader Mode that cuts blue light for long reading sessions. The on-screen menu includes an Aspect Ratio setting with Full Wide, Original, and 1:1 options, so a 4:3 converter frame can be shown in its true shape or stretched, at the buyer’s choice. The stand tilts only, and the monitor has no built-in speakers.

The LG is a good fit for a shared desk where the converter machine sits next to a modern computer, because the HDMI input serves the modern machine at 75Hz with FreeSync while the VGA input serves the converter at 60Hz. Buyers who want built-in sound or a height-adjustable stand should look at the HP or Dell models instead, but for a clean and modern-looking retro screen, the LG earns its place.

Acer R240HY

The Acer R240HY is the pick for buyers who want the fastest maker-listed response time in this group with the simplest setup. The 23.8-inch IPS panel runs at 1920 x 1080 at 60Hz, and Acer lists a 4 ms gray-to-gray response time, the quickest figure among the seven models here.

That 4 ms figure matters most for fast scrolling text and arcade-style games, where a slower panel can smear moving edges. The difference between 4 ms and 5 ms gray-to-gray is small in practice, and it should not be the only reason to choose this monitor, but it is a real maker-listed edge, and it comes with no trade-off in refresh rate or resolution. The panel also covers 178-degree viewing angles with a 1000:1 contrast ratio and 250 nits of brightness.

Inputs cover HDMI, DVI, and VGA, and Acer includes a VGA cable in the box, so the converter plugs in with no extra purchase. The zero-frame design keeps the bezels slim, which suits a desk where the retro screen sits beside a modern monitor, and the panel uses a flicker-free backlight with a blue light filter for long sessions. The on-screen menu includes a Wide Mode setting with Full, Aspect, and 1:1 options, so the 4:3 converter frame can be held in its true shape.

The trade-offs are the stand and the sound. The stand tilts only, with no height, swivel, or pivot adjustment, and the monitor has no built-in speakers, so buyers need a riser and a separate speaker for a complete retro setup. The R240HY is also an older model, so buyers should confirm the exact variant, since Acer sold this screen under several suffixes with the same panel. For buyers who want the quickest panel and the simplest cable setup, it is a strong choice.

AOC 24B2XH

The AOC 24B2XH closes the list as the slimmest and simplest screen here, and it shares the fastest maker-listed response time in the group. The 23.8-inch IPS panel runs at 1920 x 1080, and the AOC leaflet lists a 75Hz maximum refresh rate with a 4 ms gray-to-gray response time.

One conflict is worth stating. The AOC leaflet lists 4 ms gray-to-gray, while a few spec aggregator pages list 7 ms for this model. This guide uses the maker leaflet figure of 4 ms, because the leaflet is the structured spec record from AOC, and the aggregator figure has no maker source behind it. The 75Hz ceiling applies to the HDMI input, and the VGA input runs at 60Hz in line with the converter output, so the retro picture is unaffected by the difference.

The panel is a 250-nit IPS unit with a 1000:1 contrast ratio and 178-degree viewing angles, and the thin design keeps the desk footprint small. Inputs cover HDMI and VGA, and AOC includes a VGA cable in the box, so the converter chain is complete out of the box. The on-screen menu includes an Image Ratio setting with Wide, 4:3, 1:1, and movie options, so the 4:3 frame can be held in its true shape.

The trade-offs match the Acer: a tilt-only stand with no height adjustment, and no built-in speakers, so sound and screen height need separate solutions. The AOC is also the most basic screen here, with no USB hub and no DisplayPort input, which matters only if the same screen must serve several modern machines. For a buyer who wants a slim, quick, and simple screen that does the converter job well and nothing more, the AOC is an honest final pick.

Buying guide for the best monitors to use with a cga to vga converter

A converter purchase is a chain purchase, not a single monitor purchase, and the buying decisions change accordingly. The guide here covers the three choices that cause the most trouble: holding the 4:3 shape, feeding the monitor a clean signal, and finishing the desk around the screen.

Match the aspect ratio before you buy

A 4:3 frame stretched across a 16:9 panel is the most common disappointment in a converter setup, and it is fixed in the monitor menu, not in the converter. Every model in this guide exposes an aspect control under a different name, from Dell Wide Mode to BenQ Display Mode and ASUS Aspect Control.

Set the control to the 4:3 or Aspect option before judging the picture, and expect black bars on the left and right of the screen, because those bars are the cost of a true shape. The 1:1 option shows the converter output pixel for pixel in a smaller window, which suits buyers who want the sharpest text, while the Full option stretches the image and should be avoided for retro use. If a monitor has no aspect control at all, skip it for this job, because no converter setting can fix a stretched panel.

Feed the monitor a clean 60Hz VGA signal

A converter outputs a standard VGA signal, most often 640 x 480 at 60Hz, and the monitor only needs to accept that signal without complaint. Every model in this guide lists a VGA input and a 60Hz refresh rate, and the two 75Hz models in the group reach 75Hz only over HDMI, so their VGA input still runs at 60Hz in line with the converter.

Use a short and well-shielded VGA cable, because a long analog cable picks up ghosting and softness that no monitor setting can remove, and keep the cable away from power bricks and other noise sources. The Dell P2219H adds an Auto Adjust function that only works over VGA, which tunes the picture position and clock to the converter signal, and that is a genuine advantage when the image arrives slightly off-center. Set the converter output to 640 x 480 at 60Hz when the converter offers a choice, since that is the most widely supported VGA mode in this group.

Plan the desk, the sound, and the cables

The converter, the old computer, and the monitor all need desk space, power, and cables, so plan the layout before ordering. Only the HP 24mh in this group has built-in speakers, so every other model needs a separate speaker or headphones for games and demos that use sound.

Check the stand before you buy. The Dell P2219H adjusts for height, tilt, swivel, and pivot, while the HP 24mh adjusts for height and tilt, and the other five models tilt only, so a tilt-only screen on a high desk may need a riser or a VESA arm to reach a comfortable eye level. Leave room behind the desk for the converter box itself, which needs its own power supply and a short cable run to both the old computer and the monitor, and label the VGA cable so a later cable swap does not break the chain.

Frequently asked questions

These questions cover the practical doubts that come up most often when buyers connect a classic computer to a modern screen through a converter. The answers use the same maker-listed figures as the rest of the guide, with no invented performance claims.

Can the best monitors to use with a cga to vga converter show a 4:3 image

Yes, every model in this guide can show a 4:3 image, because each one exposes an aspect control in its on-screen menu. Set the control to the 4:3 or Aspect option, and the converter frame sits in its true shape with black bars at the sides instead of stretching across the 16:9 panel.

The control has a different name on each brand, Wide Mode on Dell and Acer, Display Mode on BenQ, Aspect Control on ASUS, Aspect Ratio on LG, and Image Ratio on AOC, but the effect is the same. If a monitor lacks this control, the 4:3 image stretches by default, so confirm the setting exists before buying.

Does a CGA to VGA converter add input lag

A converter adds some delay, because it must read a full frame of the old signal and write it out as VGA, and that buffering takes time. The amount depends on the converter design, not on the monitor, so no monitor in this guide can remove it, and no maker publishes a millisecond input lag figure for these models.

Choose a converter that advertises a frame-buffer-free or line-doubling design when low delay matters, and keep the monitor at 60Hz with any extra image processing turned off. For text adventures, strategy games, and demos, the delay is rarely noticed, while fast arcade games show it most.

Can any monitor in this guide accept a raw CGA signal

No, none of them can, and no modern flat panel sold today accepts a raw CGA signal directly. A CGA output runs at a 15.75 kHz horizontal scan rate, while the monitors in this guide list horizontal scan ranges starting around 24 to 30 kHz, so the old signal falls outside what the panel can lock onto.

The converter exists to bridge that gap: it reads the 15.75 kHz signal and writes out a standard VGA signal at 60Hz that any VGA monitor accepts. Buying a monitor with a VGA input is necessary but not sufficient on its own, and the converter is the part that makes the whole chain work.

Conclusion

A converter turns a classic CGA signal into standard VGA, and the seven monitors in this guide all accept that signal with a real VGA input and a 4:3 aspect mode. Pick the HP 24mh for built-in sound, the BenQ GW2480 for the truest 4:3 image, or the Dell P2219H for a compact adjustable desk, and the Acer R240HY for the fastest panel.