Core i9-11900KF vs Ryzen 5 8400F

Core i9-11900KF vs Ryzen 5 8400F Performance Spectrum

Core i9-11900KF

8 / 16

24,585

+0.1%

24,554

0.0%

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper PRO 5975WX

Ryzen Threadripper 9960X

About PassMark

PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.

Core i9-11900KF vs Ryzen 5 8400F FPS Benchmarks

Predicted gaming performance across popular games. Tested paired with GeForce RTX 5090 to isolate CPU performance.

Search any supported game below to compare 1080p FPS for both components.

Core i9-11900KF vs Ryzen 5 8400F: Pros, Cons & Final Verdict

See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.

Core i9-11900KF

2021

Why buy it

✅Better for gaming: +12.5% higher average FPS across 50 shared CPU benchmark tests.
✅100+% more PCIe lanes (20 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark per dollar, at 47.9 vs 81.0 PassMark/$ ($513 MSRP vs $303 MSRP).
❌92.3% higher power demand at 125W vs 65W.
❌Older platform position on LGA1200 with DDR4, while Ryzen 5 8400F moves to AM5 and DDR5.

Ryzen 5 8400F

2024

Why buy it

✅Costs $210 less on MSRP ($303 MSRP vs $513 MSRP).
✅Delivers 69.1% more PassMark for each dollar spent, at 81.0 vs 47.9 PassMark/$ ($303 MSRP vs $513 MSRP).
✅Draws 65W instead of 125W, a 60W reduction.
✅Newer platform on AM5 with DDR5 support instead of LGA1200 and DDR4.

Trade-offs

❌Worse for gaming: lower average FPS than Core i9-11900KF across 50 shared CPU benchmark tests.
❌Lower PassMark (24,554 vs 24,585).

Quick Answers

So, is Core i9-11900KF better than Ryzen 5 8400F?

Yes. Core i9-11900KF is the better all-around CPU here. It gives you a 12.5% average FPS lead across 50 shared CPU game tests in our data and 0.1% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Core i9-11900KF is the better pick. According to our tests, it delivers 12.5% more average FPS across 50 shared CPU game tests.

Which one is better for streaming, content creation, and heavy multitasking?

For streaming, content creation, and heavier multitasking, Core i9-11900KF is the stronger fit. You are getting 0.1% better PassMark, backed by 8 cores and 16 threads.

Which one is the smarter buy today, not just the cheaper CPU?

Core i9-11900KF is still the faster CPU overall, but Ryzen 5 8400F is easier to justify if budget matters more than peak performance. Core i9-11900KF comes in 69.3% more expensive on MSRP at $513 MSRP versus $303 MSRP, and it still gives you a 12.5% average FPS lead across 50 shared CPU game tests in our data. Ryzen 5 8400F is also 69.1% better value on MSRP (81.0 vs 47.9 PassMark/$), which is why it can still make sense for tighter-budget builds on paper. That said, if you already own a compatible AM5 + DDR5 setup, Ryzen 5 8400F can still make sense as a platform-matched option because it avoids a motherboard and RAM swap.

Which one is more future-proof for 2026 and beyond?

Ryzen 5 8400F makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2024 vs 2021) and a healthier platform with AM5 and DDR5 instead of LGA1200. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i9-11900KF vs Ryzen 5 8400F Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

Core i9-11900KF

The Core i9-11900KF is manufactured by Intel. It was released in 16 March 2021 (4 years ago). It is based on the Rocket Lake (2021) architecture. It features 8 cores and 16 threads. Base frequency is 3.5 GHz, with boost up to 5.2 GHz. L3 cache: 16 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1200. Thermal design power (TDP): 125 Watt. Memory support: DDR4-3200. Passmark benchmark score: 24,585 points. Launch price was $299.

Ryzen 5 8400F

The Ryzen 5 8400F is manufactured by AMD. It was released in 1 April 2024 (1 year ago). It is based on the Phoenix (2023−2024) architecture. It features 6 cores and 12 threads. Base frequency is 4.2 GHz, with boost up to 4.7 GHz. L3 cache: 16 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: AM5. Thermal design power (TDP): 65 Watt. Memory support: DDR5. Passmark benchmark score: 24,554 points. Launch price was $170.

⚡

Processing Power

The Core i9-11900KF packs 8 cores / 16 threads, while the Ryzen 5 8400F offers 6 cores / 12 threads — the Core i9-11900KF has 2 more cores. Boost clocks reach 5.2 GHz on the Core i9-11900KF versus 4.7 GHz on the Ryzen 5 8400F — a 10.1% clock advantage for the Core i9-11900KF (base: 3.5 GHz vs 4.2 GHz). The Core i9-11900KF uses the Rocket Lake (2021) architecture (14 nm), while the Ryzen 5 8400F uses Phoenix (2023−2024) (4 nm). In PassMark, the Core i9-11900KF scores 24,585 against the Ryzen 5 8400F's 24,554 — a 0.1% lead for the Core i9-11900KF. Both processors carry 16 MB (total) of L3 cache.

Feature	Core i9-11900KF	Ryzen 5 8400F
Cores / Threads	8 / 16+33%	6 / 12
Boost Clock	5.2 GHz+11%	4.7 GHz
Base Clock	3.5 GHz	4.2 GHz+20%
L3 Cache	16 MB (total)	16 MB (total)
L2 Cache	256K (per core)+25500%	1 MB (per core)
Process	14 nm	4 nm-71%
Architecture	Rocket Lake (2021)	Phoenix (2023−2024)
PassMark	24,585	24,554
Cinebench R23 Multi	15,500	—

🧠

Memory & Platform

The Core i9-11900KF uses the LGA1200 socket (PCIe 4.0), while the Ryzen 5 8400F uses AM5 (PCIe 4.0) — making them incompatible on the same motherboard.

Feature	Core i9-11900KF	Ryzen 5 8400F
Socket	LGA1200	AM5
PCIe Generation	PCIe 4.0	PCIe 4.0
Max RAM Speed	DDR4-3200	—
Max RAM Capacity	128 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	20	—

🔧

Advanced Features

Virtualization: VT-x, VT-d (Core i9-11900KF) / not specified (Ryzen 5 8400F).

Feature	Core i9-11900KF	Ryzen 5 8400F
Integrated GPU	No	—
Unlocked	Yes	—
AVX-512	Yes	—
Virtualization	VT-x, VT-d	—

💰

Value Analysis

At launch, the Core i9-11900KF was priced at $513, while the Ryzen 5 8400F came in at $303. On launch pricing ($513 vs $303), Ryzen 5 8400F was $210 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i9-11900KF delivers 47.9 pts/$ vs 81.0 pts/$ for the Ryzen 5 8400F — making the Ryzen 5 8400F the 51.4% better value option.

Feature	Core i9-11900KF	Ryzen 5 8400F
MSRP	$513	$303-41%
Performance per Dollar	47.9	81.0+69%
Release Date	2021	2024

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