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NVIDIA GeForce RTX 4080 + 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

16GB
GPU VRAM
320W
GPU TDP
6C/6T
CPU Cores
LGA1151
Socket
🛒 Check NVIDIA GeForce RTX 4080 Price🛒 Check Intel Core i5-8400 Price

Estimated FPS in Popular Games (1080p)

GameLowHighUltraGenre
Grand Theft Auto VI (GTA 6)1268762Open World
Cyberpunk 207718412890Action Rpg
Counter-Strike 2 (CS2)482332238Fps Shooter
Valorant619427307Fps Shooter
Grand Theft Auto V (GTA 5)328227163Open World
Red Dead Redemption 2233162116Open World
Fortnite378261186Battle Royale
Call of Duty: Warzone263182129Battle Royale
Call of Duty: Black Ops 6262181129Fps Shooter
Apex Legends451312224Battle Royale
Minecraft (with Shaders)236163117Sandbox
League of Legends (LoL)670462332Moba
Dota 2421290209Moba
PUBG: Battlegrounds332229164Battle Royale
Overwatch 2537370266Fps Shooter
Rainbow Six Siege597411296Fps Shooter
Rust18913194Survival
Escape from Tarkov15810978Survival Fps
Hogwarts Legacy20113999Action Rpg
Elden Ring244169121Action Rpg
Baldur's Gate 3210145104Rpg
Starfield14910474Action Rpg
Helldivers 2213148106Co Op Shooter
Black Myth: Wukong18212691Action Rpg
Alan Wake 216411481Survival Horror
Palworld231160114Survival
EA Sports FC 25387267192Sports
Forza Horizon 5301208148Racing
The Witcher 3 (Next-Gen)231160114Action Rpg
Marvel's Spider-Man 220113999Action 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 4080 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: 550W (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: 16GB GDDR — check per-game requirements in the FPS table.
🔋GPU Power Draw: 320W — CPU: 65W

FAQ

Does the Intel Core i5-8400 bottleneck the NVIDIA GeForce RTX 4080?

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

What PSU do I need?

A quality 550W 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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