Core i9-11900K vs Ryzen 7 5800X

Core i9-11900K vs Ryzen 7 5800X Performance Spectrum

Core i9-11900K

8 / 16

24,990

0.0%

27,712

+10.9%

Ryzen Threadripper 3990X

Ryzen Threadripper PRO 9965WX

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 i9-11900K vs Ryzen 7 5800X 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 i9-11900K vs Ryzen 7 5800X: Pros, Cons & Final Verdict

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

Core i9-11900K

2021

Why buy it

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 7 5800X across 50 shared CPU benchmark tests.
❌Lower PassMark (24,990 vs 27,712).
❌Smaller total L3 cache (16 MB vs 32 MB).
❌Lower PassMark per dollar, at 46.4 vs 61.7 PassMark/$ ($539 MSRP vs $449 MSRP).
❌19% higher power demand at 125W vs 105W.

Ryzen 7 5800X

2020

Why buy it

✅Better for gaming: +16.1% higher average FPS across 50 shared CPU benchmark tests.
✅+100% larger total L3 cache (32 MB vs 16 MB).
✅Costs $90 less on MSRP ($449 MSRP vs $539 MSRP).
✅Delivers 33.1% more PassMark for each dollar spent, at 61.7 vs 46.4 PassMark/$ ($449 MSRP vs $539 MSRP).
✅Draws 105W instead of 125W, a 20W reduction.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Quick Answers

So, is Ryzen 7 5800X better than Core i9-11900K?

Yes. Ryzen 7 5800X is the better all-around CPU here. It gives you a 16.1% average FPS lead across 50 shared CPU game tests in our data and 10.9% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Ryzen 7 5800X is the better pick. According to our tests, it delivers 16.1% 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, Ryzen 7 5800X is the stronger fit. You are getting 10.9% better PassMark, backed by 8 cores and 16 threads. It also has the larger cache pool with 100% larger total L3 cache (32 MB vs 16 MB).

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

Ryzen 7 5800X is the better buy right now. Ryzen 7 5800X comes in $90 cheaper on MSRP at $449 MSRP versus $539 MSRP, and it still gives you a 16.1% average FPS lead across 50 shared CPU game tests in our data. It is also 33.1% better value on MSRP (61.7 vs 46.4 PassMark/$), so you are getting the faster CPU without taking a value hit on paper. That said, if you already own a compatible LGA1200 + DDR4 setup, Core i9-11900K can still make sense as a platform-matched option because it avoids a motherboard and RAM swap, but on MSRP alone you would want to find it meaningfully cheaper in real-world listings before that path becomes easy to justify.

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

Core i9-11900K makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2021 vs 2020). That makes it the safer long-term bet.

Core i9-11900K vs Ryzen 7 5800X Technical Specifications

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

Core i9-11900K

The Core i9-11900K 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: 512 kB (per core). Built on 14 nm process technology. Socket: LGA1200. Thermal design power (TDP): 125 Watt. Memory support: DDR4. Passmark benchmark score: 24,990 points. Launch price was $539.

Ryzen 7 5800X

The Ryzen 7 5800X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen 3) (2020−2022) architecture. It features 8 cores and 16 threads. Base frequency is 3.8 GHz, with boost up to 4.7 GHz. L3 cache: 32 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4. Passmark benchmark score: 27,712 points. Launch price was $449.

⚡

Processing Power

Both the Core i9-11900K and Ryzen 7 5800X share an identical 8-core/16-thread configuration. Boost clocks reach 5.2 GHz on the Core i9-11900K versus 4.7 GHz on the Ryzen 7 5800X — a 10.1% clock advantage for the Core i9-11900K (base: 3.5 GHz vs 3.8 GHz). The Core i9-11900K uses the Rocket Lake (2021) architecture (14 nm), while the Ryzen 7 5800X uses Vermeer (Zen 3) (2020−2022) (7 nm, 12 nm). In PassMark, the Core i9-11900K scores 24,990 against the Ryzen 7 5800X's 27,712 — a 10.3% lead for the Ryzen 7 5800X. L3 cache: 16 MB (total) on the Core i9-11900K vs 32 MB on the Ryzen 7 5800X.

Feature	Core i9-11900K	Ryzen 7 5800X
Cores / Threads	8 / 16	8 / 16
Boost Clock	5.2 GHz+11%	4.7 GHz
Base Clock	3.5 GHz	3.8 GHz+9%
L3 Cache	16 MB (total)	32 MB+100%
L2 Cache	512 kB (per core)	512K (per core)
Process	14 nm	7 nm, 12 nm-50%
Architecture	Rocket Lake (2021)	Vermeer (Zen 3) (2020−2022)
PassMark	24,990	27,712+11%

🧠

Memory & Platform

The Core i9-11900K uses the LGA1200 socket (PCIe 4.0), while the Ryzen 7 5800X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard.

Feature	Core i9-11900K	Ryzen 7 5800X
Socket	LGA1200	AM4
PCIe Generation	PCIe 4.0	PCIe 4.0
Max RAM Speed	—	DDR4-3200
Max RAM Capacity	—	128 GB
RAM Channels	—	2
ECC Support	—	Yes
PCIe Lanes	—	24

🔧

Advanced Features

Virtualization: not specified (Core i9-11900K) / AMD-V (Ryzen 7 5800X). Primary use case: Ryzen 7 5800X targets Desktop.

Feature	Core i9-11900K	Ryzen 7 5800X
Integrated GPU	—	No
Unlocked	—	Yes
AVX-512	—	No
Virtualization	—	AMD-V
Target Use	—	Desktop

💰

Value Analysis

At launch, the Core i9-11900K was priced at $539, while the Ryzen 7 5800X came in at $449. On launch pricing ($539 vs $449), Ryzen 7 5800X was $90 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i9-11900K delivers 46.4 pts/$ vs 61.7 pts/$ for the Ryzen 7 5800X — making the Ryzen 7 5800X the 28.4% better value option.

Feature	Core i9-11900K	Ryzen 7 5800X
MSRP	$539	$449-17%
Performance per Dollar	46.4	61.7+33%
Release Date	2021	2020

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