Does the Core i5-12400F Bottleneck the RTX 4070?

Short answer: Yes, at 1080p and 1440p. The Core i5-12400F limits the RTX 4070 by 29% at 1080p and 16% at 1440p. At 4K the pair is balanced (15% GPU), because the graphics card has much more work per frame there.

Best resolution for this pair: 4K
Bottleneck: 29% CPU at 1080p, 16% CPU at 1440p, 15% GPU at 4K
Average FPS (9 demanding games, High): 112 at 1080p, 90 at 1440p, 54 at 4K
Recommended power supply: 550 W or more

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Core i5-12400F + RTX 4070 bottleneck at 1080p, 1440p and 4K

Resolution	Bottleneck	Limiting part	What it means
1080p	29%	CPU (moderate)	The CPU often holds the card back. Free fixes help; a CPU upgrade helps more.
1440p	16%	CPU (mild)	The CPU limits the card a little in high-frame-rate games.
4K	15%	GPU (mild)	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 i5-12400F + RTX 4070: 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 46% at 1080p.

Game type	1080p	1440p	4K
Esports (CS2, Valorant)	43% CPU	35% CPU	15% CPU
Battle royale (Fortnite, Warzone)	29% CPU	16% CPU	15% GPU
Open world (Cyberpunk, RDR2)	14% CPU	6% GPU	30% GPU
Strategy and simulation (Flight Sim, Cities)	46% CPU	40% CPU	23% CPU
Racing (Forza, F1)	23% CPU	6% CPU	23% GPU

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

Core i5-12400F + RTX 4070 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 4070 with the Core i5-12400F averages about 112 FPS at 1080p, 90 FPS at 1440p and 54 FPS at 4K. At 1440p the processor sets the limit in Valorant, Hogwarts Legacy, Baldur's Gate 3.

Game	1080p High	1440p High	4K High
Counter-Strike 2	327 (216 low)	299 (216 low)	175 (136 low)
Valorant	399 (263 low)	399 (287 low)	238 (186 low)
Fortnite	178 (128 low)	127 (99 low)	74 (58 low)
Call of Duty: Black Ops 7	124 (97 low)	89 (69 low)	52 (40 low)
Battlefield 6	116 (77 low)	100 (78 low)	58 (45 low)
ARC Raiders	131 (86 low)	109 (85 low)	64 (50 low)
Marvel Rivals	108 (84 low)	77 (60 low)	45 (35 low)
Cyberpunk 2077	109 (78 low)	86 (67 low)	50 (39 low)
Black Myth: Wukong	83 (64 low)	59 (46 low)	34 (27 low)
Hogwarts Legacy	80 (53 low)	80 (57 low)	48 (37 low)
Baldur's Gate 3	80 (53 low)	80 (53 low)	64 (50 low)
Elden Ring	60 (40 low)	60 (43 low)	50 (39 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 i5-12400F + RTX 4070: specs at a glance

Part	Key specs	Platform	Power
Core i5-12400F	6 cores / 12 threads, Alder Lake (2022)	LGA1700, DDR4 / DDR5	65 W rated, up to about 117 W
RTX 4070	12 GB GDDR6X, Ada Lovelace (2023)	DLSS 4 upscaling and DLSS Frame Generation (2x)	About 200 W board power

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

Core i5-12400F + RTX 4070: what to expect at each resolution

1080p

At 1080p the CPU bottleneck is 29%, so the RTX 4070 will often run below full load. You will feel it most in fast multiplayer games and in 1% lows (stutter). Expect about 109 FPS in Cyberpunk 2077, 178 FPS in Fortnite and 327 FPS in Counter-Strike 2 on High.

1440p

At 1440p the CPU still limits the card (16%), but less than at 1080p (29%), because each frame gives the graphics card more work. Expect about 86 FPS in Cyberpunk 2077, 127 FPS in Fortnite and 299 FPS in Counter-Strike 2 on High.

4K

At 4K the RTX 4070 is the limit (15% GPU), which is normal and means you are getting the card’s full speed, unlike at 1080p. Expect about 50 FPS in Cyberpunk 2077, 74 FPS in Fortnite and 175 FPS in Counter-Strike 2 on High.

Core i5-12400F + RTX 4070: best upgrade for this build

Upgrade the CPU first. Your Core i5-12400F uses the LGA1700 socket, so you can drop in a faster chip without a new motherboard: Core i5-14600K (18% CPU at 1080p, 1% GPU at 1440p) or Core i7-14700K (12% CPU at 1080p, 8% GPU at 1440p). Update the motherboard BIOS before you swap. A faster graphics card would add little until the processor is faster. See the best CPU for the RTX 4070.

Core i5-12400F + RTX 4070: power supply for this pair

The Core i5-12400F can draw up to about 117 W and the RTX 4070 about 200 W. With 100 W for the rest of the system and 25% headroom, a good 550 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 i5-12400F + RTX 4070: 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 i5-12400F + RTX 4070: frequently asked questions

Does the Core i5-12400F bottleneck the RTX 4070?

Yes, at 1080p and 1440p. The Core i5-12400F limits the RTX 4070 by 29% at 1080p and 16% at 1440p. At 4K the pair is balanced (15% GPU), because the graphics card has much more work per frame there.

Is the Core i5-12400F good enough for the RTX 4070 at 1440p?

It works, but the CPU holds the card back by 16% at 1440p, so you leave some performance on the table, mostly in multiplayer games.

How many FPS does the Core i5-12400F with the RTX 4070 get?

On High settings we estimate about 112 FPS at 1080p and 90 FPS at 1440p on average across nine demanding games, for example 86 FPS in Cyberpunk 2077 at 1440p and 178 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 i5-12400F and RTX 4070?

About 550 W from a good brand with an 80 Plus Gold rating. That covers the CPU (up to about 117 W), the graphics card (about 200 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.