Guides
The calculators give you the number. These explain where it comes from, so you can judge it and adjust it to your own situation.
How Much Does It Cost to Run a Gaming PC?
What a gaming PC really costs in electricity, from the card’s power limit to the bill, for every current graphics card and in every US state.
How to Choose a PSU Wattage for Your Build
How to size a power supply from the processor’s real power limit and the card’s board power, why TDP undercounts, and when the card maker knows better.
How Take-Home Pay Is Calculated in the US
Every deduction between a US salary and a paycheck — federal tax, Social Security, Medicare, state and local tax — worked through on one salary.
How Much VRAM Do You Need to Run an LLM Locally?
How to work out the memory a local LLM needs — weights, KV cache and overhead — what quantisation and context change, and which cards fit which models.
Every figure in these guides is computed from the same datasets and code as the calculators, so a guide and the calculator it links to always agree. How each calculation works is set out on the Methodology page.