Between the GPU and the monitor, the display is the quieter energy user, but it still runs for hours every day, and big high-refresh panels are not free to feed. Whether you are budgeting a build, sizing a UPS, or just curious about your power bill, here is a grounded look at what monitors actually draw and how to trim it without hurting your experience.
What drives a monitor’s power draw
Three factors dominate: panel size, backlight or self-emissive brightness, and technology. A big screen has more area to light, high brightness pulls more power, and HDR content driving many bright pixels spikes consumption. Refresh rate adds a little, but brightness and size matter far more. OLED power scales with how bright the on-screen content is, so a dark game sips power while a white desktop costs more.
Typical consumption ranges
These are representative running figures for common monitors at moderate to high brightness.
| Monitor | Typical draw (SDR) | Peak (HDR/bright) | Cost/yr at 4h/day, around $0/kWh |
|---|---|---|---|
| 24″ 1080p 144Hz IPS | 18-25 W | ~30 W | ~$5 |
| 27″ 1440p 165Hz IPS | 30-45 W | ~55 W | ~$9 |
| 32″ 4K 144Hz mini-LED | 55-90 W | ~150 W | ~$18 |
| 34″ ultrawide QD-OLED | 40-70 W (content-dependent) | ~120 W | ~$13 |
How to cut consumption sensibly
Brightness is the biggest lever
Dropping backlight brightness from 100% to a comfortable 40 to 60% can cut power noticeably and is easier on your eyes indoors. Most people run panels far brighter than a normal room needs. Enabling any eco or ambient-light auto-brightness mode helps too.
Sleep, HDR, and habits
Set the monitor to sleep after a few idle minutes so it drops to under a watt instead of idling at full draw. Reserve HDR for content that benefits, since sustained HDR keeps brightness and power high. Turning the monitor fully off overnight beats standby if you want to squeeze the last bit.
Sizing a UPS and reading the label
If you run a battery backup, the monitor’s draw matters for runtime. A typical 27-inch panel adding 30 to 45 watts to a system is minor next to a gaming PC that may pull several hundred, but on a small UPS it still shortens backup time, so include it when sizing. The sticker on the back lists a maximum rating that is usually higher than real running draw, since it accounts for peak conditions; a cheap plug-in power meter shows what your monitor actually consumes at your brightness and content, which is the number worth planning around.
Standby and phantom draw
A monitor in sleep typically sips under a watt, but some models with always-on USB hubs, ambient sensors, or fast-wake features draw a few watts continuously even when the screen is dark. Over a year that phantom load is small in dollars but easy to eliminate by switching the monitor off at a power strip when you are away for long periods. For most people the bigger, simpler win remains dropping daytime brightness, which cuts active consumption far more than chasing standby watts.
FAQ
Do high refresh rates use much more power?
A little, but brightness and panel size dwarf it. Moving from 60Hz to 144Hz adds only a few watts, whereas cranking brightness or going HDR can add tens of watts. Optimize brightness first.
Does OLED use more power than LCD?
It depends on content. OLED sips power in dark scenes and can exceed an LCD on full-white screens, because every lit pixel draws current. Average mixed use often lands similar to a comparable LCD.
Bottom line
Most gaming monitors draw somewhere between about 20 and 90 watts in normal use, adding only single-digit to mid-teens dollars a year for typical sessions. Panel size, brightness, and HDR drive the number far more than refresh rate. Lower your brightness to a sane level and let the panel sleep, and you cut consumption without giving up anything you actually notice.
