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

Short answer: Only at 1080p. The Core i9-14900K limits the RTX 4090 by 23% at 1080p, which mostly shows in high-frame-rate games. At 1440p (7% CPU) and 4K (22% GPU) the pair is balanced, so this is a good match for a 1440p monitor.

Best resolution for this pair: 1440p
Bottleneck: 23% CPU at 1080p, 7% CPU at 1440p, 22% GPU at 4K
Average FPS (9 demanding games, High): 212 at 1080p, 182 at 1440p, 113 at 4K
Recommended power supply: 1050 W or more

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Core i9-14900K + RTX 4090 bottleneck at 1080p, 1440p and 4K

Resolution	Bottleneck	Limiting part	What it means
1080p	23%	CPU (moderate)	The CPU often holds the card back. Free fixes help; a CPU upgrade helps more.
1440p	7%	CPU (balanced)	Balanced. Both parts are well used.
4K	22%	GPU (moderate)	The graphics card is fully used. This is the normal, healthy kind of limit.

From our bottleneck calculator with its default settings: Battle Royale game type, 16 GB RAM, High detail, typical background load. How we calculate.

Check this pair with your own settings

Core i9-14900K + RTX 4090: bottleneck by type of game

The same pair can be balanced in one game and CPU-bound in another, because some games lean much harder on the processor. For this build the CPU is felt most in strategy and simulation games, at 43% at 1080p.

Game type	1080p	1440p	4K
Esports (CS2, Valorant)	39% CPU	30% CPU	6% CPU
Battle royale (Fortnite, Warzone)	23% CPU	7% CPU	22% GPU
Open world (Cyberpunk, RDR2)	5% CPU	15% GPU	35% GPU
Strategy and simulation (Flight Sim, Cities)	43% CPU	35% CPU	16% CPU
Racing (Forza, F1)	15% CPU	4% GPU	29% GPU

Bottleneck from our calculator for each game type, 16 GB RAM, High detail.

Core i9-14900K + RTX 4090 FPS in popular games

Estimated average FPS and 1% lows on the High preset, native resolution, no ray tracing, with 16 GB of RAM. Across nine demanding games the RTX 4090 with the Core i9-14900K averages about 212 FPS at 1080p, 182 FPS at 1440p and 113 FPS at 4K. At 1440p the processor sets the limit in Counter-Strike 2, Valorant, Battlefield 6, Hogwarts Legacy, Baldur's Gate 3.

Game	1080p High	1440p High	4K High
Counter-Strike 2	585 (386 low)	585 (421 low)	364 (284 low)
Valorant	715 (472 low)	715 (472 low)	497 (388 low)
Fortnite	338 (243 low)	265 (207 low)	155 (121 low)
Call of Duty: Black Ops 7	260 (187 low)	186 (145 low)	108 (84 low)
Battlefield 6	208 (137 low)	208 (150 low)	121 (95 low)
ARC Raiders	234 (155 low)	227 (164 low)	133 (103 low)
Marvel Rivals	221 (159 low)	161 (125 low)	94 (73 low)
Cyberpunk 2077	195 (129 low)	180 (129 low)	105 (82 low)
Black Myth: Wukong	169 (122 low)	123 (96 low)	72 (56 low)
Hogwarts Legacy	143 (94 low)	143 (94 low)	99 (78 low)
Baldur's Gate 3	143 (94 low)	143 (94 low)	133 (95 low)
Elden Ring	60 (40 low)	60 (40 low)	60 (47 low)

Estimates from our FPS calculator model, which is calibrated against published review results. Expect real results within about ±12%. Elden Ring is locked to 60 FPS by the game.

Calculate FPS for any game with this pair

Core i9-14900K + RTX 4090: specs at a glance

Part	Key specs	Platform	Power
Core i9-14900K	24 cores / 32 threads, Raptor Lake Refresh (2023)	LGA1700, DDR4 / DDR5	125 W rated, up to about 253 W
RTX 4090	24 GB GDDR6X, Ada Lovelace (2022)	DLSS 4 upscaling and DLSS Frame Generation (2x)	About 450 W board power

Manufacturer specifications. Maximum CPU power is AMD’s package power limit or Intel’s maximum turbo power.

Core i9-14900K + RTX 4090: what to expect at each resolution

1080p

At 1080p the CPU bottleneck is 23%, so the RTX 4090 will often run below full load. You will feel it most in fast multiplayer games and in 1% lows (stutter). Expect about 195 FPS in Cyberpunk 2077, 338 FPS in Fortnite and 585 FPS in Counter-Strike 2 on High.

1440p

At 1440p the pair is balanced (7% CPU), so both parts are well used. Expect about 180 FPS in Cyberpunk 2077, 265 FPS in Fortnite and 585 FPS in Counter-Strike 2 on High.

4K

At 4K the RTX 4090 is the limit (22% GPU), which is normal and means you are getting the card’s full speed, unlike at 1080p. Expect about 105 FPS in Cyberpunk 2077, 155 FPS in Fortnite and 364 FPS in Counter-Strike 2 on High.

Core i9-14900K + RTX 4090: best upgrade for this build

Upgrade the CPU first. The Core i9-14900K has no faster drop-in option worth buying on its LGA1700 platform, so the next step is a new platform such as AM5 with a Ryzen 7 7800X3D or 9800X3D. A faster graphics card would add little until the processor is faster. See the best CPU for the RTX 4090.

Core i9-14900K + RTX 4090: power supply for this pair

The Core i9-14900K can draw up to about 253 W and the RTX 4090 about 450 W. With 100 W for the rest of the system and 25% headroom, a good 1050 W power supply (80 Plus Gold or better) is a safe choice. Use the PSU wattage calculator to include your exact drives, fans and overclocking.

Core i9-14900K + RTX 4090: settings tips for this pair

Raise graphics settings and resolution: the GPU has spare power, the CPU does not. Higher settings cost almost no FPS here.
Use native resolution or DLAA / FSR Native AA instead of a Performance upscaling mode, which would only shift more load to the CPU.
Lower CPU-heavy settings: crowd density, object view distance, physics and simulation quality.
Turn on XMP or EXPO so the RAM runs at its rated speed, and use two sticks for dual channel.
Close browsers, launchers and overlays while gaming to free up CPU time.

Core i9-14900K + RTX 4090: frequently asked questions

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

Only at 1080p. The Core i9-14900K limits the RTX 4090 by 23% at 1080p, which mostly shows in high-frame-rate games. At 1440p (7% CPU) and 4K (22% GPU) the pair is balanced, so this is a good match for a 1440p monitor.

Is the Core i9-14900K good enough for the RTX 4090 at 1440p?

Yes. At 1440p the bottleneck is 7% CPU, which is in the balanced range, so you get close to the card’s full speed.

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

On High settings we estimate about 212 FPS at 1080p and 182 FPS at 1440p on average across nine demanding games, for example 180 FPS in Cyberpunk 2077 at 1440p and 338 FPS in Fortnite at 1080p.

Should I upgrade the CPU or the GPU first?

The CPU. The graphics card already has spare power, so a faster GPU would add little until the processor is faster.

What power supply do I need for the Core i9-14900K and RTX 4090?

About 1050 W from a good brand with an 80 Plus Gold rating. That covers the CPU (up to about 253 W), the graphics card (about 450 W), the rest of the system and some headroom.

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All CPU and GPU pair results

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Sources: Tom’s Hardware GPU hierarchy, Tom’s Hardware CPU hierarchy, TechSpot CPU and GPU scaling tests, TechPowerUp GPU database, and manufacturer specifications from AMD, Intel and NVIDIA. Bottleneck and FPS figures come from our own bottleneck and FPS models.