Core Ultra 5 245K + RTX 5080: bottleneck check
Balanced at 1440p.
Well matched at 1440p. The Core Ultra 5 245K is the slightly busier part, by about 9%.
By resolution
| Resolution | Limiting part | Severity | Verdict |
|---|---|---|---|
| 1080p | CPU | 15% | mild CPU bottleneck |
| 1440p | CPU | 9% | balanced |
| 4K | GPU | 13% | balanced |
This is the classic pattern: at 1080p the Core Ultra 5 245K is the limit (15%), while at 4K the RTX 5080 takes over (13% GPU-limited). If you play at 1080p on a high-refresh monitor, a faster CPU is the upgrade that matters; at 1440p or 4K this pair is already well matched.
Specifications
| Cores / threads | 14 / 14 |
|---|---|
| Max boost | 5.2 GHz |
| Socket | LGA1851 |
| Maximum turbo power (MTP) | 159 W Intel's published maximum sustained turbo power, above its base power; the PSU estimate uses it, so it errs high · Intel ARK |
| Released | 2024 |
| Gaming index | 76 / 100 |
| Multi-core index | 78 / 100 |
| VRAM | 16 GB |
|---|---|
| Board power | 360 W |
| Released | 2025 |
| 1080p index | 75.6 / 100 |
| 1440p index | 72 / 100 |
| 4K index | 68.5 / 100 |
Power supply
The RTX 5080 measured 325 W average while gaming (417 W highest 20 ms spike, TechPowerUp). With the Core Ultra 5 245K at its maximum turbo power of 159 W and about 75 W for the rest of the system, the sustained load is about 559 W. A 850 W unit is the safe choice; a good-quality 750 W unit also covers the measured draw. Details on the RTX 5080 PSU page or try other pairs in the PSU calculator.
Upgrade paths
CPUs that remove the bottleneck
LGA1851Best CPU for the RTX 5080 Best GPU for the Core Ultra 5 245K RTX 5080 PSU requirements
Same CPU, other cards
AllSame card, other CPUs
AllIndexes are relative estimates aggregated from published reviews; real results vary by game, settings, memory speed and drivers. Methodology.