An office PC may cost less to run than a gaming PC, but there is no reliable universal bill difference. To compare yours, measure both computers at the wall while they run the same YouTube stream, then apply your local electricity rate to their average power draw.
A power supply’s capacity, a GPU’s rating, or an online estimate cannot tell you what either complete system will use in your particular stream. The method below gives you a repeatable comparison rather than a guess.
Why there is no universal bill difference
“Office PC” and “gaming PC” describe broad categories, not fixed power levels. An office desktop might use an older processor, several drives and a discrete graphics card; a gaming tower might have efficient parts and spend most of its time encoding a modest video. Their average draw depends on the actual components, settings and tasks, not just the label on the case.
The stream itself matters, too. A computer encoding a simple looping devotional video is doing a different job from one capturing a game, compositing overlays or encoding high-resolution footage. Display resolution, frame rate, encoder choice, background processes and whether hardware encoding is active can all change the workload. YouTube’s guidance on live encoder settings and bitrates explains how recommendations vary by resolution and frame rate; it does not provide a wattage figure for your PC.
Runtime and measurement scope matter just as much. A reading for the tower alone is not the same as a reading that includes a display, speakers and other peripherals. Nor is a short peak reading a good stand-in for the average over a day. To compare two systems fairly, set a common workload, measure the same equipment boundary and use the same runtime assumption and tariff.
If you want a separate view of the non-electricity trade-off between a local computer and cloud operation, see our 24/7 streaming cost overview. It does not replace a measurement of your own machines. Your bill depends on the actual average draw and the marginal rate you pay for the additional electricity.
Measure both PCs at the wall
Use a plug-in electricity usage monitor that reports power in watts and, ideally, accumulated energy in kilowatt-hours. Plug the computer into the monitor, then plug the monitor into a suitable wall socket. Follow the meter and computer manufacturers’ safety instructions, and do not exceed the monitor’s rating. If you are uncertain whether the socket, adapter or meter is appropriate for your setup, ask a qualified electrician rather than improvising.
Decide what you are comparing before you connect anything. For a PC-only comparison, measure only the tower on each system. If your real operating choice includes a display or audio equipment, include those items consistently on both sides. Microsoft’s PC electricity-cost example explicitly notes that its reading excluded peripherals. That is a useful reminder to make the boundary clear, not a current benchmark for office computers.
First take a reading when the system is in its intended streaming state, not just at the desktop before you start the encoder. If your meter shows live watts, note the value periodically during the run and calculate an average from those observations. If it can accumulate kWh, record the starting and ending readings over a representative interval; divide the energy consumed by the duration in hours, then multiply by 1,000 to get average watts. For example, if a meter shows a change of 1.2 kWh over 10 hours, the average is 120 W. This is an example of the conversion, not a claim about a typical PC.
A single instantaneous reading can catch a momentary spike or lull. A longer measurement that covers the ordinary pattern of playback, encoding and any scheduled changes is more useful. Include the period when the channel is actually running, and do not mix measurements from a quiet desktop session with measurements from a live encoder session.
Repeat the process on the second computer, keeping the measurement scope and conditions the same. Record the meter model or at least its displayed units, the start and end times, the average draw, and any relevant unusual events. If you use one meter for both systems, that can help keep readings comparable, provided the same stream conditions are recreated.
Match the streaming workload and runtime
A fair comparison means running the same content and stream configuration on both machines. Use the same video file or playlist, resolution, frame rate, bitrate target, encoder and YouTube destination settings where the software allows. Note whether encoding is performed in software on the CPU or by a hardware encoder. If one computer cannot use the same settings reliably, that is a practical difference to record, not a reason to quietly change the test and call it matched.
YouTube describes the basic role of the encoder in its official live-stream guide: it converts video into a digital format for streaming. The service’s transcoding for viewers is separate from the work your own computer performs before sending the stream. Neither the recommended incoming bitrate nor the channel’s resolution tells you directly how many watts the encoding PC consumes.
Test the workflow you intend to keep running. If the channel is a pre-recorded loop with a static logo and occasional title changes, reproduce that. If it uses OBS scenes, a moving background, audio processing or a live camera, include those elements. The guide to choosing a resolution for a continuous waterfall stream can help you think through the output quality decision before you measure. Resolution is part of the workload, but it is not a proxy for power draw.
Allow each computer to reach its normal operating pattern before you begin recording, then observe it over a period long enough to capture ordinary variation. A stream may have periodic playlist changes, animated overlays, updates or maintenance tasks. If those events are part of daily operation, include them or measure separately and note their frequency. Avoid running updates on one machine during the test and not the other.
For a 24/7 estimate, multiply the representative average watts by the same number of hours for both computers. If your stream is intended to be continuous, use 24 hours per day; if you expect scheduled downtime, use the hours you actually expect to run. Our article on OBS restart behaviour after a reboot is relevant to operational resilience, but automatic recovery does not remove the need to measure the energy used while the stream is running.
Convert average watts into energy use
Electricity bills generally express consumption in kilowatt-hours (kWh). A kilowatt is 1,000 watts, and a kilowatt-hour is the energy used by a 1,000-watt load running for one hour. For an average measured draw in watts, the calculation is:
Energy (kWh) = average watts × hours ÷ 1,000.
For a 30-day continuous month, the calculation becomes:
Monthly energy (kWh) = average watts × 24 × 30 ÷ 1,000.
Using the arithmetic example of 120 W, the result is 86.4 kWh for that 30-day period. This is not a prediction for an office PC or gaming PC; replace the example with the average you measured. If the meter directly reports kWh over a suitable test window, use that reading to verify the calculation.
| Input or result | What to record | Why it matters |
|---|---|---|
| Average wall draw | Watts during the matched stream | Captures the complete measured system, not a component rating |
| Runtime | Hours per day and days in the billing period | A 24/7 assumption differs from a channel with planned breaks |
| Energy use | kWh for the chosen period | Makes the draw comparable with the units on your bill |
| Measurement scope | PC only, or PC plus named peripherals | Prevents comparing unlike equipment boundaries |
Use the billing period that applies to your own calculation rather than assuming every bill covers exactly 30 days. If you want an estimate for a calendar month, state the number of days used. Keep unrounded readings in your notes and round only the result you present; otherwise small rounding differences can become confusing when you compare the two computers.
Apply your local marginal electricity rate
Once you have kWh, multiply by the price that applies to the additional electricity your stream consumes. In simple form:
Cost = energy use (kWh) × marginal electricity price per kWh.
Use your current bill or tariff information, not a national average or an old example from another country. If your bill has different rates by time of day, a flat rate may not represent a stream running across all hours. Use the relevant time-of-use rates and estimate the energy used in each period if you can. Taxes, fixed charges and other bill items can affect the total amount due, but they may not change in proportion to each extra kWh; distinguish the marginal energy charge from the full bill.
For instance, if your measured result is 86.4 kWh for the chosen month, multiply 86.4 by the per-kWh rate that applies to that usage. Do not copy Microsoft’s historical example rate as though it were current or local. Its 2011 article used 102 W at idle and an example rate of $0.10/kWh to demonstrate the calculation. The arithmetic is still useful, but those readings and that rate are not representative current results for your PC or tariff.
If you are in India, check the bill or your distribution company’s current tariff for the applicable energy charge and any time-of-day terms. Tariffs can differ by location, customer category and billing arrangement. For a comparison, apply the same rate assumptions to both PCs; then, if relevant, calculate a second scenario for different operating hours or tariff periods.
Why ratings do not tell you system draw
A power supply unit (PSU) rating is a capacity rating: it describes the power the unit is designed to provide under specified conditions. It is not a meter reading of what the complete PC takes from the wall. The computer will draw what its components and current workload require, with additional losses affected by the PSU and operating conditions. A PSU marked with a high capacity does not mean the PC consumes that amount continuously.
Likewise, a GPU’s thermal design power (TDP) or other component power specification is not the wall draw of the whole machine. It does not include the CPU, motherboard, memory, storage, fans, PSU conversion losses or attached devices. Component ratings are useful when selecting compatible hardware or understanding a particular part, but they cannot answer what a finished system costs to leave streaming all day.
Broad wattage calculators and general online estimates have the same limitation: they may be useful for planning or rough sizing, but they are not measurements of your matched workload. Historical modelling is also not a head-to-head test. A 2016 Lawrence Berkeley National Laboratory paper, “Taming the Energy Use of Gaming Computers”, estimated gaming-computer use under stated assumptions. Its model included a display and assumed an average 4.4 hours per day in gaming mode; it did not measure modern office and gaming PCs running the same 24/7 YouTube stream.
That paper also described a specific older setup and excluded high-performance work-computer use from its scope. A figure from it cannot establish what a current gaming tower or office PC will draw while encoding your channel. Treat the paper as context about how assumptions shape energy estimates, not as a bill comparison you can apply to your machines.
What the available evidence cannot establish
The available sources do not provide a controlled, current, matched test of a modern office PC and a modern gaming PC encoding the same YouTube stream around the clock. They do not establish a universal number of watts saved by choosing an office PC, a standard monthly bill difference, or an expected saving from swapping a GPU. Those outcomes require measurements under comparable conditions.
The LBNL study’s reported annual gaming-computer energy estimate and approximate cost belong to its 2016 model and the assumptions described in that paper. Its separate GPU efficiency result came from a specific Unigine Heaven benchmark cycle and excluded the display. Neither result is an expected 24/7 streaming outcome. Microsoft’s older 102 W idle measurement was for its named test PC, not a representative present-day office computer.
YouTube’s official settings guidance can help you choose stream parameters, but it does not quantify the encoder computer’s electricity use. Nor does a successful short test establish that a system will remain stable indefinitely. If a test reveals dropped frames, restarts or other faults, resolve those separately and repeat the power measurement with a reliable stream. You can also review codec and bitrate choices for a low-bandwidth stream to settle the outgoing settings before comparing machines.
A careful result is still useful even without a published benchmark. It tells you what your own systems draw, under the workload you actually intend to run, and lets you calculate the cost at your own tariff. Keep the readings and assumptions with the result so you can repeat the comparison after a hardware change, software update or tariff revision.
If leaving a PC on is itself the problem you are trying to avoid, StreamNeo can remove the need to keep your own computer running by turning an uploaded file into a YouTube live stream; that addresses operating the channel without a home PC, rather than proving an electricity saving for your particular setup. It is YouTube-only, so it will not suit a channel that needs another destination.
Before committing, compare the operating options on the pricing page. When the file and channel are ready, start free — 24-hour trial, no card.
FAQ
Is an office PC always cheaper to leave on?
No. The label alone does not establish the machine’s average wall draw, and the result depends on the parts, workload and attached equipment. Measure both systems during the same stream and compare their kWh at the same local rate.
Can I use the wattage printed on a PSU?
Use it to understand the PSU’s capacity, not the computer’s continuous electricity use. The reading you need is power drawn at the wall by the complete system under your streaming workload.
Should I include the monitor in my measurement?
Include it if you want to estimate the cost of the setup as you actually operate it, but measure it on both sides of the comparison. For a PC-only result, leave the monitor and peripherals outside the meter boundary and say so clearly.
How long should I measure?
Long enough to capture the ordinary pattern of the stream, not just a momentary reading. If your channel has periodic tasks or changing scenes, include them in the test or account for them separately, and record the test conditions so you can reproduce the result.