Monitor Buying Guide: Panel Types, Resolution, Refresh Rate, and What Actually Matters

Panel Technology: The Most Important Decision

The display panel determines contrast, color, viewing angle, and response time.

Three technologies are worth understanding: IPS (In-Plane Switching): good color accuracy, wide viewing angles, fast response.

Contrast is limited to approximately 1000:1 (IPS Black extends this to ~2000:1).

IPS glow is visible in dark rooms.

Best for: office work, creative work, gaming where response time matters.

Resolution and Pixel Density

Resolution is only meaningful in relation to screen size, pixel density (pixels per inch) is the relevant number.

1080p at 24 inches: 91 PPI, adequate, not sharp for close viewing 1440p at 27 inches: 108 PPI, the optimal balance for gaming and productivity 4K at 27 inches: 163 PPI, very sharp, requires 125-150% Windows scaling 4K at 32 inches: 137 PPI, sharp at 125% scaling, good for large-format work

Refresh Rate and GPU Requirements

Refresh rate (Hz) is the maximum number of frames the display can show per second.

At 60Hz, a frame renders every 16.7ms.

The refresh rate is only useful if your GPU provides the corresponding frame rate.

A 165Hz monitor showing 60fps games looks no better than a 60Hz monitor showing the same content.

Approximate GPU frame rate ranges at 1440p in demanding AAA games (2026 titles): For competitive games (lower GPU demand): all of the above achieve higher frame rates, making 165Hz+ relevant.

Contrast Ratio Marketing

Marketed contrast ratios (often 3000:1 or 5000:1) use peak brightness vs minimum brightness measurements under specific conditions.

The number you see at your desk is the native contrast ratio in typical content, approximately 1000:1 for IPS, 2000-3000:1 for VA.

Dynamic contrast ratios (DCR) are measured with the backlight at maximum and minimum simultaneously at different times, a meaningless marketing number.

Always look for native or static contrast ratio specifications.

Response Time Specifications

GtG (Gray-to-Gray): time for a pixel to transition from one gray value to another.

Varies significantly based on which gray transition is measured.

Manufacturers test the fastest transitions for specifications.

MPRT (Moving Picture Response Time): uses backlight strobing to reduce perceived motion blur.

Requires strobe mode, which reduces brightness and may cause eye strain for some users.

HDR: What Works and What Does Not

HDR (High Dynamic Range) allows a wider range between darkest and brightest content.

To produce visible HDR effect: Peak brightness must be above 600 nits (HDR600 or higher) Contrast ratio must be high enough to show the difference (OLED or mini-LED) It produces minimal HDR effect, the brightness difference between an SDR display and an HDR400 display in HDR content is not visually significant.

OLED panels: true HDR due to infinite contrast

Panel Size Considerations

24 inches: too small for 1440p (the pixel density advantage is wasted).

Appropriate for 1080p gaming where the smaller size allows keeping the panel within comfortable viewing distance.

27 inches: the most versatile size.

Works well at 1440p and 4K.

Far enough for comfortable viewing, close enough that the full panel fills the field of view without requiring head movement.

Blue Light and Eye Strain

Blue light filtering reduces the blue component of the display spectrum, which research suggests improves sleep quality when using displays in the evening.

Most monitors include a low blue light mode; it reduces color accuracy, so it is generally used in the evening rather than all day.

Flicker-free backlights (PWM-free) eliminate the rapid flickering that some people perceive as eye strain.

Most quality monitors now use DC dimming that does not flicker.

If you are sensitive to display flicker, verify that a monitor is flicker-free before purchasing.

What Specifications to Ignore

Response time (alone): marketing measurement, not comparable between brands.

Dynamic contrast ratio: not a real measurement.

DisplayHDR 400 certification: no meaningful HDR quality.

"True 8-bit": all monitors use at least 8-bit color.

"6-bit + FRC" uses dithering to simulate 8-bit, minor difference in practice.