EnergyLabelEU
EN
Costs for 0.283 €/kWh · Eurostat 2026 H1

Monitors · 39″ · 3440×1440 · OLED

LG 39GX90SA

G

Uses less electricity than 4% of the 1,482 monitors, 32–42″ on the EU register. At your selected price (European Union) that is €17 a year, €167 over ten years.

Power, SDR
40.3 W
Typical 31 W
Running cost
€17 / year
4 h a day
Power, HDR
45.9 W
1.1× SDR

Uses more than most comparable models: 96 % of them need less. ShenzhenGuoruitongTechnologyCoLtd G156F, the most efficient alternative on sale, saves about €14 a year. 73% of comparable models reach a better class than G; the most common is F. On-mode power in SDR is 40.3 W; the typical screen of this size draws 31.5 W. LG has 244 models in this group; this one is number 232 among them.

Where it stands

Rank 1,419 of 1,482 monitors, 32–42″ by yearly consumption. 1,418 use less.

Median 46 This model · 59 5 135 kWh ← uses less · uses more →

Next to it in the ranking

  1. G ViewSonic VS17550 58 kWh −€0.11
  2. G Alienware AW3926QW 59 kWh same
  3. G LG 39GX90SA 59 kWh
  4. G LG 39GX950B 59 kWh same
  5. F Blackstorm 40B2R 59 kWh same
See the full ranking

What it will cost you

Period 39GX90SA G156F Difference
1 year €17 €3 −€14
5 years €83 €13 −€70
10 years €167 €26 −€140
15 years €250 €39 −€211

Is the more efficient model worth its price?

Years of use

Enter both purchase prices to see the total cost of ownership.

Power in SDR and HDR

SDR 40.3 W
HDR 45.9 W
Group median, SDR 31.5 W

Cost by viewing time

Use kWh / yr € / yr
2 hours a day 29 €8
4 hours a day 59 €17
8 hours a day 118 €33

Same size, lower running cost

On sale, at least 10% less energy, same size group

Model SizeSDR W kWh / yr Saves / year in 10 years
G LG 39GX90SA (this model)
39″40.3 59 — —
40″6.3 9 €14 €140
38″6.7 10 €14 €139
40″7.4 11 €14 €136
39″15.7 23 €10 €102
38″25.9 38 €6 €59

Label and product sheet

Energy class SDR / HDR
G / G
On-mode power SDR
40.3 W
On-mode power HDR
45.9 W
Standby / networked standby
0.5 W / 2.0 W
Screen diagonal
39″
Resolution
3440×1440
Panel
OLED
Refresh rate
60 Hz
Software updates (minimum)
8 years
Guarantee (supplier)
1 years
Spare parts (minimum)
8 years

Model numbers and history

2 model numbers are registered by LG with identical label values (usually colour or market variants). Searching any of them leads here.

39GX90SA · 39GX90SB

  1. First published in the EU register (EPREL)
  2. Placed on the EU market

Questions

How much does the LG 39GX90SA cost to run?

At 4 hours a day it uses about 59 kWh a year according to its EU energy label. At the EU average household price of 0.283 €/kWh that is about €17 a year, or €167 over ten years.

Does HDR use more electricity?

Yes. In HDR mode this screen draws 45.9 W instead of 40.3 W, 1.1 times as much. The yearly cost on this page uses SDR, as the label does.