Core i5-12600K + RTX 3090: bottleneck check
Balanced at 1440p.
Well matched at 1440p. The RTX 3090 is the slightly busier part, by about 6%.
By resolution
| Resolution | Limiting part | Severity | Verdict |
|---|---|---|---|
| 1080p | CPU | 2% | balanced |
| 1440p | GPU | 6% | balanced |
| 4K | GPU | 26% | GPU-bound (normal) |
This is the classic pattern: at 1080p the Core i5-12600K is the limit (2%), while at 4K the RTX 3090 takes over (26% 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 | 10 / 16 |
|---|---|
| Max boost | 4.9 GHz |
| Socket | LGA1700 |
| Max turbo power | 150 W |
| Released | 2021 |
| Gaming index | 72 / 100 |
| Multi-core index | 62 / 100 |
| VRAM | 24 GB |
|---|---|
| Board power | 350 W |
| Released | 2020 |
| 1080p index | 51.7 / 100 |
| 1440p index | 46 / 100 |
| 4K index | 40.9 / 100 |
Power supply
CPU 150 W + GPU 350 W + about 100 W for motherboard, memory, storage and fans gives an estimated peak load of 600 W. We recommend a 850 W unit (80 Plus Gold or better) so transient spikes from the graphics card stay inside the PSU's comfort zone. Try other pairs in the PSU calculator.
Upgrade paths
CPUs that remove the bottleneck (LGA1700)
- Core i5-13400F + RTX 3090 (gaming index 70)
- Core i5-14400F + RTX 3090 (gaming index 72)
- Core i7-12700K + RTX 3090 (gaming index 75)
GPUs that use the Core i5-12600K more fully
- Core i5-12600K + RX 9070 (1440p index 53)
- Core i5-12600K + RTX 4070 Ti (1440p index 52)
- Core i5-12600K + RTX 4070 Ti Super (1440p index 56)
Best CPU for the RTX 3090 Best GPU for the Core i5-12600K RTX 3090 PSU requirements
Compare nearby pairs
Same CPU, other GPUs
Indexes are relative estimates aggregated from published reviews; real results vary by game, settings, memory speed and drivers. Methodology.