GPU bottleneck vs CPU bottleneck: what actually happens
**GPU bottleneck**: GPU can't keep up. FPS capped below GPU's capable speed. Throw more GPU power at it. **CPU bottleneck**: CPU can't feed frames to GPU. GPU sits idle, underutilized. Throw more CPU power at it. **Reality**: Most gaming is GPU-bound (GPU is the limit). CPU bottleneck is rare except at 1080p 240+ FPS or competitive esports.
Resolution impact: 1080p vs 1440p vs 4K
**1080p 240Hz**: CPU matters most (high refresh = high CPU load). Pair good CPU (i7/Ryzen 7) with medium GPU. **1440p 144Hz**: Balanced. Both matter equally. RTX 4070 Super + Ryzen 7 5700X = perfect match. **4K 60Hz**: GPU matters most (rendering 4K = huge GPU work). Pair RTX 4090 with mid-tier CPU (i5/Ryzen 5).
Best CPU/GPU pairings by budget
**$500 total**: GTX 1650 + Ryzen 5 5500. Both budget, balanced. **$800 total**: RTX 4060 Ti + Ryzen 7 5700X. GPU slightly better. **$1200 total**: RTX 4070 Super + Ryzen 7 7700X. Matched tier. **$2000 total**: RTX 4090 + i9-14900K. Balanced high-end.
Real-world FPS impact: CPU upgrade vs GPU upgrade
**Current system**: RTX 4070 + Ryzen 5 5500, 1440p 60 FPS Baldur's Gate 3. **Upgrade CPU to i7-14700K**: +5-10 FPS (60 → 65-70 FPS). **Upgrade GPU to RTX 4090**: +40-60 FPS (60 → 100-120 FPS). **Lesson**: GPU upgrades deliver bigger FPS gains.
Overclocking: does it matter?
CPU overclocking: +5-15% FPS. Risky, requires cooling. GPU overclocking: +5-10% FPS. Safer than CPU. For gaming: Not worth the effort. Better to spend on better hardware.