Intel Core i9-12900K vs Intel Core i7-12700K
TDP, sustained power draw, transient peaks, overclocking power limits, and PSU wattage impact.
| Specification | Intel Core i9-12900K | Intel Core i7-12700K |
|---|---|---|
| Brand | Intel | Intel |
| Socket | LGA1700 | LGA1700 |
| Generation | Alder Lake | Alder Lake |
| Core Count | 16 | 12 |
| Base TDP (PL1) | 125W | 125W |
| Sustained Power (PL2 / All-Core) | 241W | 190W |
| Transient Peak (×1.20 model) | 289W | 228W |
| Overclockable | ✓ Yes (PL2 > TDP) | ✓ Yes (PL2 > TDP) |
| MSRP | $279 | $199 |
PSU Wattage Impact
Intel Core i9-12900K adds 289W to your system's transient peak (241W sustained × 1.20 transient factor).Intel Core i7-12700K adds 228W (190W × 1.20).
When pairing with a high-end GPU (RTX 5090: 902W transient peak), the CPU transient adds 289W or 228W respectively. Note: Intel Core i9-12900K can draw up to 241W sustained under all-core boost — ensure your motherboard VRM and PSU can support this. Note: Intel Core i7-12700K can draw up to 190W sustained — account for this in your PSU budget.
Frequently Asked Questions
How much power does Intel Core i9-12900K use at full load?
Intel Core i9-12900K draws 241W sustained (PL2 / all-core boost) and can spike to 289W during transient loads. Its base TDP is 125W. For PSU calculations, always use the sustained draw (241W), not the base TDP.
How much power does Intel Core i7-12700K use at full load?
Intel Core i7-12700K draws 190W sustained and peaks at 228W. Base TDP is 125W. Use 190W in your PSU sizing calculation.
Which CPU needs a bigger PSU?
Intel Core i9-12900K requires more PSU wattage with 241W sustained vs 190W. The difference of 51W sustained matters most when combined with a high-end GPU. Use PSUCheck's full PSU calculator to get the total system recommendation.