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NVIDIA GeForce RTX 3090 + Intel Core i5-8400

Bottleneck Analysis & Gaming FPS Estimates

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Severe CPU Bottleneck

Significant bottleneck (~60%). Upgrading the CPU is strongly recommended.

Bottleneck at a Glance

60%
1080p Bottleneck
CPU
60%
1440p Bottleneck
CPU
60%
4K Bottleneck
CPU

Component Specs

24GB
GPU VRAM
350W
GPU TDP
6C/6T
CPU Cores
LGA1151
Socket
🛒 Check NVIDIA GeForce RTX 3090 Price🛒 Check Intel Core i5-8400 Price

Estimated FPS in Popular Games (1080p)

GameLowHighUltraGenre
Grand Theft Auto VI (GTA 6)1027150Open World
Cyberpunk 207714810272Action Rpg
Counter-Strike 2 (CS2)399275197Fps Shooter
Valorant522360259Fps Shooter
Grand Theft Auto V (GTA 5)266184132Open World
Red Dead Redemption 218712993Open World
Fortnite309213152Battle Royale
Call of Duty: Warzone214148106Battle Royale
Call of Duty: Black Ops 6213147105Fps Shooter
Apex Legends364251181Battle Royale
Minecraft (with Shaders)19313496Sandbox
League of Legends (LoL)565390280Moba
Dota 2348240173Moba
PUBG: Battlegrounds271187134Battle Royale
Overwatch 2435300215Fps Shooter
Rainbow Six Siege487336241Fps Shooter
Rust15710877Survival
Escape from Tarkov1329165Survival Fps
Hogwarts Legacy16111180Action Rpg
Elden Ring19713697Action Rpg
Baldur's Gate 317111885Rpg
Starfield1218460Action Rpg
Helldivers 217312086Co Op Shooter
Black Myth: Wukong14510172Action Rpg
Alan Wake 21309164Survival Horror
Palworld18712992Survival
EA Sports FC 25312215155Sports
Forza Horizon 5240166118Racing
The Witcher 3 (Next-Gen)18512892Action Rpg
Marvel's Spider-Man 216211280Action Adventure
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Upgrade Recommendations

Current: Intel Core i5-8400
⬆ Intel Core i7-9700K
+49.0% performance gain
Your Intel Core i5-8400 limits the NVIDIA GeForce RTX 3090 by ~60%. Upgrading to Intel Core i7-9700K unlocks ~49.0% more CPU performance on the same socket.
View New ComboCheck Price on Amazon

Compatibility & Power

⚡Recommended PSU: 600W (80+ Bronze or better)
🔌CPU Socket: LGA1151 — verify your motherboard compatibility.
⚠️9th Gen Intel CPUs on 300-series motherboards may require a BIOS update.
🎮VRAM: 24GB GDDR — check per-game requirements in the FPS table.
🔋GPU Power Draw: 350W — CPU: 65W

FAQ

Does the Intel Core i5-8400 bottleneck the NVIDIA GeForce RTX 3090?

At 1080p, the estimated bottleneck is 60% (CPU).

What PSU do I need?

A quality 600W 80+ Bronze PSU is recommended.

Can I upgrade the CPU without changing my motherboard?

Yes — as long as you stay on the LGA1151 socket.

Compare Other Pairings

NVIDIA GeForce GTX 1050 TiNVIDIA GeForce GTX 1060 6GBNVIDIA GeForce GTX 1070NVIDIA GeForce GTX 1070 TiNVIDIA GeForce GTX 1080NVIDIA GeForce GTX 1080 Ti
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