Intel Core i5-14400F vs Intel Core i9-13900K
TDP, sustained power draw, transient peaks, overclocking power limits, and PSU wattage impact.
| Specification | Intel Core i5-14400F | Intel Core i9-13900K |
|---|---|---|
| Brand | Intel | Intel |
| Socket | LGA1700 | LGA1700 |
| Generation | Raptor Lake Refresh | Raptor Lake |
| Core Count | 10 | 24 |
| Base TDP (PL1) | 65W | 125W |
| Sustained Power (PL2 / All-Core) | 148W | 253W |
| Transient Peak (×1.20 model) | 178W | 304W |
| Overclockable | ✓ Yes (PL2 > TDP) | ✓ Yes (PL2 > TDP) |
| MSRP | $159 | $349 |
PSU Wattage Impact
Intel Core i5-14400F adds 178W to your system's transient peak (148W sustained × 1.20 transient factor).Intel Core i9-13900K adds 304W (253W × 1.20).
When pairing with a high-end GPU (RTX 5090: 902W transient peak), the CPU transient adds 178W or 304W respectively. Note: Intel Core i5-14400F can draw up to 148W sustained under all-core boost — ensure your motherboard VRM and PSU can support this. Note: Intel Core i9-13900K can draw up to 253W sustained — account for this in your PSU budget.
Frequently Asked Questions
How much power does Intel Core i5-14400F use at full load?
Intel Core i5-14400F draws 148W sustained (PL2 / all-core boost) and can spike to 178W during transient loads. Its base TDP is 65W. For PSU calculations, always use the sustained draw (148W), not the base TDP.
How much power does Intel Core i9-13900K use at full load?
Intel Core i9-13900K draws 253W sustained and peaks at 304W. Base TDP is 125W. Use 253W in your PSU sizing calculation.
Which CPU needs a bigger PSU?
Intel Core i9-13900K requires more PSU wattage with 253W sustained vs 148W. The difference of 105W sustained matters most when combined with a high-end GPU. Use PSUCheck's full PSU calculator to get the total system recommendation.