PSU, power cables & GPU efficiency
Modern GPUs can spike well above average gaming power — size the PSU and cables for peaks, not only sticker TDP.
Reading power numbers
Board power (TGP) is a guide, not a ceiling. Gaming bursty loads and transient spikes matter for PSU choice. Reputable PSU reviews and GPU reviews that log peak power help more than dividing TDP by efficiency alone.
12VHPWR and adapters
Use quality cables rated for your PSU — avoid daisy-chaining marginal PCIe leads on high-power cards. If your PSU predates the 12VHPWR era, plan a proper adapter or PSU upgrade; marginal wiring is a fire and stability risk.
Efficiency and noise
A GPU that runs cooler and more efficient at the same performance often sustains boost clocks longer and keeps fans quieter. Case airflow and ambient temperature still matter as much as the chip itself.