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How Much Power Do Computers Consume?

By Nicholas Brown.

What Is The Power Consumption Of Desktop Computers?

The power consumption of desktop computers ranges from 200 to 850 Watts for most PCs without monitors. Workstations and high-end gaming PCs may consume more energy. Desktop monitors are typically 20-40 Watts (not including CRT or LED-backlit models). The power consumption of gaming PCs is usually 650 to 1,500 Watts. The average power consumption of a mid range computer that is not under full load is 50 to 250 Watts (not including the monitor).

Computers have a maximum wattage on their power supply unit (PSU) which is usually well over 300 Watts (and over 1,000 Watts in the case of some high performance models). 180W to 240W for some low-profile and small form factor (SFF) office PCs.

However, this wattage rating is the peak power output of the PSU, not the power consumption. The power consumption of computers varies significantly due to two key factors: Usage, and which parts are in them.

Energy Calculator

Kompulsa has an energy usage calculator that you can use to calculate the energy usage of a computer, and the monthly power cost. It can also calculate fuel requirements for a trip, and your MPG. If you would rather not download that app, you can use the browser-based calculator instead.

Get it on Google Play

If you use an SSD, your computer will consume less power, if you use a high end video card like an AMD RX Vega model over a low end one, your computer will consume more power. If your computer contains an Intel i5 CPU, it will consume less power than if it was an i9. This is why this page breaks power consumption down by each computer part.

Monitor power consumption is heavily influenced by the size of the monitor (i.e. larger monitors consume more power). However, newer LED-backlit monitors consume far less energy than their older CFL-backlit counterparts.

LED-backlit monitors are not to be confused with OLED models. The LED-backlit monitors I referred to above are LCD monitors. OLED monitors do not utilize LCD technology.


The power consumption of a desktop computer is attributable to a number of factors, including the type of CPU it has, video card (GPU), the type and number of drives in the computer, as well as other peripherals in the computer (such as additional video cards, video capture cards, CPU fans, chassis fans, among other devices).

For example: My desktop PC consumes between 40 and 85 Watts, depending on usage. It exceeded 80 Watts when doing certain video intensive tasks, such as watching TV shows (using a TV tuner adapter).

Table of Contents
Hard Drive Power Consumption
CPU Power Consumption
GPU Power Consumption
Fan Power Consumption

A Breakdown Of PC Power Consumption (Estimates)

Label of computer power supply unit
Label of a computer power supply unit with its electrical ratings. Image credit: Nicholas Brown/Kompulsa.

Hard Drive Power Consumption

Conventional Hard Drive Power Consumption: 5 Watts to 6.8 Watts.

Solid-State Drive (SSD) Power Consumption: 1.6 to 4.1 Watts. SSD energy usage varies more widely than conventional hard drive power usage because SSDs use far less energy when idle (due to the lack of a power-hungry spindle motor).

Most of an SSD’s power consumption is attributable to read and write (I/O) operations.

CPU Power Consumption

This section provides CPU power consumption data based on their manufacturer’s official TDP ratings (Thermal Design Power), ordered by TDP (ascending). The power consumption of a CPU is determined primarily by operating frequency, which is then determined by usage. Usage in this case refers to processing power demand (CPU utilization). As a result of this, video games and other CPU-intensive apps will increase your PC’s power consumption. Leaving your computer idle usually causes it to consume less power, and (if nothing is running) operate at or near the CPU’s base frequency.

The figures in the tables below are derived from the TDP ratings provided by the CPU manufacturers and do not confirm the maximum power consumption of the processors. The CPU benchmarks in this article were obtained from PassMark. CPU benchmarks are a measure of CPU performance and are used to do performance comparisons.

AMD CPU Power Consumption

The TDP of AMD processors ranges from 65 Watts to 250 Watts for the models in our database.

AMD CPU Power Consumption

BrandModelCoresBasefreq(GHZ)Maxfreq(GHZ)CacheTDP (Watts)CPU Benchmark (PassMark)
AMDRyzen 3 2200G (with Vega 8 GPU)43.53.74657334
AMDRyzen 3 120043.13.48656797
AMDRyzen 3 1300X43.53.78657563
AMDRyzen 5 160063.23.6166512289
AMDRyzen 5 1500X43.53.7166510113
AMDRyzen 5 140043.23.48658374
AMDRyzen 7 170083.03.7166513933
AMDRyzen 7 1800X83.64.00169515544
AMDRyzen 7 1700X83.43.8169514808
AMDRyzen 5 1600X63.64.00169513203
AMDRyzen Threadripper 1950X163.44.003218021945
AMDRyzen Threadripper 1920X123.54.003218020096
AMDRyzen Threadripper 1900X83.84.001618016108
AMDRyzen Threadripper 2990WX3234.26425023186
AMDRyzen 7 3800X83.94.53210523331
AMDRyzen 9 3900X123.84.66410532889
AMDRyzen 9 3950X163.54.76410539221
AMDRyzen 7 5700G83.84.6166524649
AMDRyzen 5 5600G63.94.4166519905
AMDRyzen 7 5700GE83.24.6163522196
AMDRyzen 5 5600GE63.44.4163518729
AMDRyzen 7 Pro 5750G83.84.6166524438
AMDRyzen 7 Pro 5750GE83.24.6163522038
AMDRyzen 5 Pro 5650G63.94.4166520827
The power consumption of AMD processors ordered by wattage, as well as Ryzen CPU benchmarks and other specs. This includes the power consumption of Ryzen CPUs, and the power consumption of the AMD FX CPUs.

Intel i5 Power Consumption

The TDP of Intel i5 processors ranges from 65 Watts to 181 Watts for the desktop models in our database.

Try Kompulsa’s energy usage calculator.

Intel i5 CPU Power Consumption

BrandModelCoresBasefreq(GHZ)Maxfreq(GHZ)CacheTDP (Watts)CPU Benchmark (PassMark)
Intel i5-8600k63.604.3099512680
The power consumption of Intel i5 CPUs, as well as other specifications such as i5 clock speeds, i5 cpu benchmark, cache memory, and their core counts (desktop models only).

Intel i7 Power Consumption

Intel i7 CPU TDP ranges from 35 Watts to 253 Watts for the desktop models in our database. In the SQL table below, the ‘tdp’ field is the CPUs’ maximum wattage.

Intel i7 CPU Power Consumption

BrandModelCoresBasefreq(GHZ)maxfreq(GHZ)Cache (MB)TDP (Watts)CPU Benchmark (PassMark)
The power consumption of Intel i7 CPUs (in the desktop segment) ordered by wattage, as well as other details such as the CPUs' base frequency, i7 cpu benchmarks, maximum frequency, core count, and cache memory.

Intel i9 Power Consumption

The power consumption (TDP/Wattage in this case) of Intel i9 desktop CPUs ranges from 140 to 241 Watts, dependent on the model for the models in our database. Unsurprisingly, the 14, 16, and 18-core models consumed more energy than those with fewer cores, and all the i9 models consumed more power than all the i7 models in our database (with one exception: the i7-7820X).

Intel i9 CPU Power Consumption

BrandModelCoresBasefreq(GHZ)Maxfreq(GHZ)Cache(MB)TDP (Watts)CPU Benchmark (PassMark)
The wattage (TDP) of Intel i9 CPUs. Other details include core count, i9 cpu benchmarks, base frequency, maximum frequency, and cache memory.

Server CPU Power Consumption

Below is a list of some Intel server CPUs, and their TDP ratings.

BrandModelCoresBasefreqTDP (Watts)ClassMaxfreqghzCache (MB)
Intel8153162.00125Xeon Platinum2.8022
Intel815643.60105Xeon Platinum3.7017
Intel8158123.00150Xeon Platinum3.7025
Intel8176282.10165Xeon Platinum3.839
Intel8160242.10150Xeon Platinum3.733
Intel8164262150Xeon Platinum3.736
Intel8168242.7205Xeon Platinum3.733
Intel8170262.1165Xeon Platinum3.736
Intel8180282.5205Xeon Platinum3.839
Intel8160T242.1150Xeon Platinum3.733
Intel8160F242.1160Xeon Platinum3.733
Intel8176F282.1173Xeon Platinum3.839
IntelE3-1220 v343.1080Xeon3.508
Intel6138202.00125Xeon Gold3.727.5
IntelE3-1226 v343.384Xeon3.708
IntelE3-1230 v343.380Xeon3.708
IntelE3-1240 v342.0025Xeon3.008
IntelE3-1246 v343.584Xeon3.98
IntelE3-1265L v342.545Xeon3.78
IntelE3-1281 v343.782Xeon4.108
Intel6148202.40150Xeon Gold3.727.5
Intel5120T142.20105Xeon Gold3.2019.25
Intel6136123.00150Xeon Gold3.7024.75
Intel5115102.485Xeon Gold3.2013.75
Intel5120142.2105Xeon Gold3.2019.25
Intel6126122.6125Xeon Gold3.7019.25
Intel5118122.3105Xeon Gold3.2016.5
Intel512243.6105Xeon Gold3.716.5

Video Card Power Consumption (GPU Power Consumption)

As is the case with other electronic devices, the power consumption of GPUs is the current wattage * the amount of time in hours that it is running. GPU wattage varies, as GPU clock speeds are adjusted dependent on processing power demand.

GPU power consumption correlates with ‘TDP’. TDP means ‘thermal design power’, and is the maximum power dissipation of a GPU, which is why the power consumption of GPUs may be lower than this figure on average (assuming typical computer usage with idling, etc).

If you are building a cryptocurrency mining rig (specifically a GPU mining rig), your GPU power consumption may be closer to due to high GPU utilization.

The table below lists the TDP of NVidia and AMD GPUs, including the NVidia Titan series, NVidia GeForce series, and the AMD Radeon Series.

GPU Power Consumption

BrandModelTDP (Watts)Base Freq (MHZ)Boost Freq (MHZ)VRAMClassGigaflops
NVidiaGT 103030-14682GeForce(Unavailable)
AMDRX 55050110011834Radeon1100
AMDRX 46075109012002Radeon2200
NVidiaGTX 1050 TI75129013924GeForce2138
NVidiaGTX 105075135414552GeForce1862
AMDRX 56080117512754Radeon2600
NVidiaGTX 95090102411882GeForce1825
AMDRX 47012092612064Radeon4900
NVidiaGTX 960120112711782GeForce2413
NVidiaGTX 1060120150617086GeForce3800
NVidiaGTX 970145105011784GeForce3920
AMDRX 570150116812448Radeon5100
NVidiaGTX 1070150150616838GeForce6463
AMDRX 480150112012668Radeon5800
NVidiaGTX 980165112612164GeForce4600
NVidiaRTX 2070175141016208GeForce(Unavailable)
NVidiaGTX 1070 TI180160716838GeForce8100
NVidiaGTX 1080180160717338GeForce9000
AMDRX 580185125713408Radeon6200
AMDRX Vega 56210115614718Radeon21000
NVidiaRTX 2080215151517108GeForce(Unavailable)
AMD5700 XT2251605190511Radeon12700
NVidiaGTX 980 TI250100010756GeForce5600
NVidiaGTX 1080 TI2501544165811GeForce11300
NVidiaTitan X2501417153112Titan11000
NVidiaTitan Xp2501405158212Titan12000
NVidiaTitan V2501200145512Titan110000
AMDRX Vega 64345124716778Radeon27500
NVidiaRTX 30903501400170024GeForce36000
NVidiaRTX 30803201440171010GeForce30000
NVidiaRTX 4060115183024608GeForce
NVidiaRTX 4060 ti1652310254016GeForce
NVidiaRTX 4070 ti2852310261012GeForce
NVidiaRTX 4070 ti Super2852340261016GeForce
NVidiaRTX 40803202210255016GeForce
NVidiaRTX 4080 Super3202290255016GeForce
NVidiaRTX 40904502230252024GeForce
The power consumption of many common graphics processing units (GPUs), as well as their base frequency, maximum frequency, compute power in gigaflops, and video memory (VRAM). This table is ordered by GPU wattage.

The table shows a significant correlation between the compute power of the GPUs (in gigaflops) vs GPU power rating. However, some models are exempt from this correlation due to newer, more efficient technology.

For example: The newer NVidia Titan V is 250 Watts, while the AMD RX Vega 64 is 345 Watts. The Titan V achieves up to 110,000 gigaflops, while the RX Vega GPU only achieves 27,500 gigaflops. Both are powerful cards, but newer models usually trounce the performance of older ones. The Titan V GPU is also built for scientific research applications.

What are gigaflops, and what are teraflops?

‘Giga’ means billion and ‘tera’ means trillion. ‘Flop’ means floating point operations per second. A floating point operation is a calculation involving decimals. Therefore a gigaflop is 1 billion floating point operations per second, and a teraflop is 1 trillion floating point operations per second.

Power Consumption Of Fans

The power consumption of computer fans is dependent on size, airflow, speed (RPM), efficiency, and usage. Most CPU fans are of variable speed PWM models, and some chassis fans are PWM controlled as well. This means that their power consumption will be determined by the speed the fan is currently operating at, as fan speed follows CPU temperature.

The maximum power consumption ratings of CPU and chassis fans observed was as low as 0.6 Watts for a 120mm Noctua PWM model, and as much as 4.8 Watts for an LED-illuminated model. As for the others:

  • 0.6 Watts (120mm model).
  • 0.84 Watts.
  • 0.96 Watts (Noctua NF-A8).
  • 1.08 Watts.
  • 1.2 Watts (80mm).
  • 1.44 Watts (120mm).
  • 2.76 Watts (140mm).
  • 3 Watts (120mm).
  • 3.6 Watts (120mm Noctua industrialPPC with 3-phase motor).
  • 3.6 Watts (120mm Thermaltake Luna 12).
  • 4.2 Watts (120mm model with LEDs).
  • 4.8 Watts (120mm model with LEDs).

As the figures above suggest, bigger fans don’t necessarily consume more power. Some designs are more efficient than others, while some smaller fans have more powerful motors to spin their blades faster to augment airflow. The figures also show that the inclusion of LEDs increases power consumption. LEDs need power too!

PCs can consume less power (a few watts less) if you use a fanless CPU cooler (passive CPU cooler), although that should be planned carefully as discussed here. Passive builds are also quieter and accumulate less dust.

Further Reading

Power usage of All-In-One PCs

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