Adding up TDP numbers undersizes builds. Intel's TDP is base power, not peak, and modern GPUs spike far above their rated draw for microseconds at a time. This calculator models both, and shows you its reasoning.
An i9-14900K is rated at 125 W and pulls up to 253 W under PL2. Treating the rating as the ceiling underestimates the CPU by half.
Ampere and Ada cards draw close to double their rated power for sub-millisecond windows. This is why quality units tripped their over-current protection with RTX 3080s.
A GTX 1080 Max-Q draws 150 W; the desktop GTX 1080 draws 180 W. They share a name in most datasets. Here they are separate records.
You will not find a bottleneck percentage here. That number requires benchmark data, which this dataset does not contain, so publishing one would mean making it up.
Same engine, same data, as a JSON API — for build planners, retail configurators, or anything that needs to size a supply programmatically.
curl "https://api.jerebrunen.com/v1/psu?cpu=Ryzen%207%207800X3D&gpu=RTX%204090"