Core i9-14900K with RTX 4090: Bottleneck & FPS

At 4K, a Core i9-14900K + RTX 4090 build averages about 97 FPS in AAA games at High settings, with 1% lows near 76 FPS: heavily GPU-limited. At 1080p the Core i9-14900K becomes the limit (30% CPU bottleneck at 1080p); from 1440p upward the RTX 4090 takes over and the CPU has capacity to spare. In esports titles such as CS2 or Valorant expect around 308 FPS, enough for a 240 Hz monitor, while CPU-heavy games like Microsoft Flight Simulator drop to about 87 FPS with a 28% CPU bottleneck. With ray tracing enabled, expect about 56 FPS at 4K, so turn on DLSS or FSR to get back above 60.

Processor

Intel Core i9-14900K

24 cores / 32 threads · LGA1700 · 2023

Graphics card

NVIDIA GeForce RTX 4090

24 GB VRAM · Ray tracing ✓ · 2022

4K (3840×2160) · High · AAA games · Native · 32 GB · 165 Hz

Change settings

GPU-limited

Heavily GPU-limited at 4K

The RTX 4090 is the limiting part at 4K, which is the normal and preferred situation for gaming. The Core i9-14900K has headroom for about 160 FPS, so it can handle a faster GPU later.

CPU160 FPSBottleneck

GPU97 FPSBottleneck

Display165 Hz

Max frames each part can deliver. Frames pile up in front of the slower one.

Avg FPS97

1% low76

CPU load61%

GPU load99%

Bottleneck by resolution

Core i9-14900K + RTX 4090 at High settings in AAA games.

Resolution	Avg FPS	1% low	Bottleneck
1080p (1920×1080)	159	111	CPU 30%
1440p (2560×1440)	147	109	Balanced
UW 1440p (3440×1440)	130	102	GPU 16%
4K (3840×2160)	97	76	GPU 39%

FPS by game type

At 4K, High settings.

Game type	Avg FPS	Limited by
AAA / mixed games Cyberpunk 2077, Black Myth: Wukong, Elden Ring	97	GPU 39%
Competitive esports CS2, Valorant, Fortnite (Performance), League of Legends	308	GPU 25%
CPU-heavy (strategy, sims, MMO) MS Flight Simulator, Cities: Skylines II, WoW, Baldur's Gate 3 Act 3	87	CPU 28%
Ray tracing / path tracing Cyberpunk RT Overdrive, Alan Wake 2, Indiana Jones	56	GPU 59%

Recommendations

Specific to these parts at 4K.

Your 165 Hz monitor can show more frames than this build delivers. Variable refresh (G-Sync/FreeSync) will keep motion smooth.

Upgrade suggestions

The smallest upgrades that balance this build.

No graphics card is a big enough step up from the RTX 4090 (40%+ more FPS) with this CPU at 4K. Use DLSS or FSR for more FPS.

Browse all 577 popular builds or open this build in the bottleneck calculator to try other settings.

Core i9-14900K + RTX 4090: quick answers

Does the Core i9-14900K bottleneck the RTX 4090?

1080p: 30% CPU-limited. 1440p: balanced. UW 1440p: 16% GPU-limited. 4K: 39% GPU-limited. At 4K the CPU keeps up, so this is a sensible pairing. A GPU-limited result is the normal, healthy state for gaming.

How many FPS does the Core i9-14900K with RTX 4090 get?

About 159 FPS at 1080p, 147 FPS at 1440p, 130 FPS at UW 1440p, 97 FPS at 4K in AAA games at High settings without upscaling. In esports games like CS2 and Valorant it reaches roughly 308 FPS at 4K.

What is the best upgrade for a Core i9-14900K + RTX 4090 build?

No graphics card is a big enough step up from the RTX 4090 to be worth it with the Core i9-14900K at 4K. Use DLSS or FSR upscaling for more FPS.