A/B Testing GPU Performance (Annual) Calculator FAQ
Answers to common questions about comparing GPU benchmarks, power draw, performance per watt, and annual electricity cost.
Use these answers to understand the calculator's inputs, results, assumptions, and the limits of a benchmark-based GPU comparison.
General calculator questions
What the calculator compares and what its results cover.
What does this GPU A/B calculator compare?
It compares GPU B with GPU A by benchmark score, typical power draw, performance per watt, annual GPU energy use, and estimated electricity cost.
What does A/B mean in this calculator?
GPU A is the baseline and GPU B is the alternative being compared against it.
Is this a whole-PC electricity calculator?
No. It uses GPU power draw only and excludes the rest of the computer.
Is the annual cost result an exact bill prediction?
No. It is an estimate based on the power, runtime, and electricity-rate inputs.
Benchmark and efficiency inputs
How to provide comparable performance and power information.
Which benchmark scores should I enter?
Enter scores from the same benchmark, workload, version, preset, resolution, and test method.
Can I compare different types of workloads?
Not in one direct result. A gaming benchmark and an AI or rendering benchmark measure different workloads.
What power draw should I use?
Use typical measured GPU draw during the chosen workload when available.
What is a good performance-per-watt result?
A positive percentage means GPU B has higher benchmark performance per watt than GPU A under the entered conditions.
Cost and annual usage questions
How runtime and electricity pricing affect the cost estimate.
How are annual operating hours calculated?
Average hours per day are multiplied by active days per year.
What electricity rate format should I use?
Enter the currency amount paid per kWh, such as 0.16 for $0.16 per kWh.
Why can annual savings be negative?
A negative value means GPU B is estimated to cost more to power, usually because it draws more power.
Does a higher local electricity rate change benchmark performance?
No. It changes the estimated cost difference but not the benchmark or performance-per-watt calculations.
Accuracy and use cases
How to use the results carefully.
Why might real application performance differ from the benchmark result?
Performance can vary with the application, CPU, memory, drivers, cooling, resolution, settings, and GPU memory requirements.
Does a faster GPU always have a better efficiency result?
No. Performance per watt depends on both benchmark score and power draw.
Can I use this for a server or workstation GPU?
Yes, if the benchmark and power values reflect a matched workload and the entered runtime is appropriate.
Does the calculator decide whether an upgrade is worthwhile?
No. It provides comparative estimates; purchase price, features, compatibility, and workload needs require separate consideration.
How is GPU annual electricity cost calculated?
GPU watts are divided by 1,000, multiplied by annual operating hours, and then multiplied by the electricity rate per kWh.
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