Core i9-11900KB vs Ryzen 5 5600X

Core i9-11900KB vs Ryzen 5 5600X Performance Spectrum

Core i9-11900KB

8 / 16

22,693

+3.9%

21,845

0.0%

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 i9-11900KB vs Ryzen 5 5600X 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 i9-11900KB vs Ryzen 5 5600X: Pros, Cons & Final Verdict

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

Core i9-11900KB

2021

Why buy it

✅Better for gaming: +4.4% higher average FPS across 50 shared CPU benchmark tests.
✅Integrated graphics onboard with Intel UHD Graphics, while Ryzen 5 5600X needs a discrete GPU.

Trade-offs

❌Smaller total L3 cache (24 MB vs 32 MB).
❌Lower PassMark per dollar, at 42.1 vs 73.1 PassMark/$ ($539 MSRP vs $299 MSRP).

Ryzen 5 5600X

2020

Why buy it

✅+33.3% larger total L3 cache (32 MB vs 24 MB).
✅Costs $240 less on MSRP ($299 MSRP vs $539 MSRP).
✅Delivers 73.5% more PassMark for each dollar spent, at 73.1 vs 42.1 PassMark/$ ($299 MSRP vs $539 MSRP).
✅20% more PCIe lanes (24 vs 20) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Core i9-11900KB across 50 shared CPU benchmark tests.
❌Lower PassMark (21,845 vs 22,693).
❌No integrated graphics, while Core i9-11900KB can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Core i9-11900KB better than Ryzen 5 5600X?

Yes. Core i9-11900KB is the better all-around CPU here. It gives you a 4.4% average FPS lead across 50 shared CPU game tests in our data, 3.9% better PassMark, and the stronger long-term platform, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Core i9-11900KB is the better pick. According to our tests, it delivers 4.4% 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 i9-11900KB is the stronger fit. You are getting 3.9% better PassMark, backed by 8 cores and 16 threads.

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

Core i9-11900KB is still the faster CPU overall, but Ryzen 5 5600X is easier to justify if budget matters more than peak performance. Core i9-11900KB comes in 80.3% more expensive on MSRP at $539 MSRP versus $299 MSRP, and it still gives you a 4.4% average FPS lead across 50 shared CPU game tests in our data. Ryzen 5 5600X is also 73.5% better value on MSRP (73.1 vs 42.1 PassMark/$), which is why it can still make sense for tighter-budget builds on paper.

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

Core i9-11900KB makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2021 vs 2020) and more multi-core headroom with 8 cores / 16 threads instead of 6/12. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core i9-11900KB vs Ryzen 5 5600X Technical Specifications

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

Core i9-11900KB

The Core i9-11900KB is manufactured by Intel. It was released in Maio 2021 (4 years ago). It is based on the Tiger Lake-H (2021) architecture. It features 8 cores and 16 threads. Base frequency is 3.3 GHz, with boost up to 4.9 GHz. L3 cache: 24 MB (total). L2 cache: 1.25 MB (per core). Built on 10 nm SuperFin process technology. Socket: FCBGA1787. Thermal design power (TDP): 65 Watt. Memory support: DDR4. Passmark benchmark score: 22,693 points. Launch price was $539.

Ryzen 5 5600X

The Ryzen 5 5600X 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 6 cores and 12 threads. Base frequency is 3.7 GHz, with boost up to 4.6 GHz. L3 cache: 32 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 65 Watt. Memory support: DDR4. Passmark benchmark score: 21,845 points. Launch price was $299.

⚡

Processing Power

The Core i9-11900KB packs 8 cores / 16 threads, while the Ryzen 5 5600X offers 6 cores / 12 threads — the Core i9-11900KB has 2 more cores. Boost clocks reach 4.9 GHz on the Core i9-11900KB versus 4.6 GHz on the Ryzen 5 5600X — a 6.3% clock advantage for the Core i9-11900KB (base: 3.3 GHz vs 3.7 GHz). The Core i9-11900KB uses the Tiger Lake-H (2021) architecture (10 nm SuperFin), while the Ryzen 5 5600X uses Vermeer (Zen 3) (2020−2022) (7 nm, 12 nm). In PassMark, the Core i9-11900KB scores 22,693 against the Ryzen 5 5600X's 21,845 — a 3.8% lead for the Core i9-11900KB. L3 cache: 24 MB (total) on the Core i9-11900KB vs 32 MB on the Ryzen 5 5600X.

Feature	Core i9-11900KB	Ryzen 5 5600X
Cores / Threads	8 / 16+33%	6 / 12
Boost Clock	4.9 GHz+7%	4.6 GHz
Base Clock	3.3 GHz	3.7 GHz+12%
L3 Cache	24 MB (total)	32 MB+33%
L2 Cache	1.25 MB (per core)	512K (per core)+40860%
Process	10 nm SuperFin	7 nm, 12 nm-30%
Architecture	Tiger Lake-H (2021)	Vermeer (Zen 3) (2020−2022)
PassMark	22,693+4%	21,845
Cinebench R23 Multi	12,264	—
Geekbench 6 Multi	10,645	—

🧠

Memory & Platform

The Core i9-11900KB uses the FCBGA1787 socket (PCIe 3.0), while the Ryzen 5 5600X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Both support up to DDR4-3200 memory speed. Both support up to 128 GB of RAM. Both feature 2-channel memory with ECC support. PCIe lanes: 20 (Core i9-11900KB) vs 24 (Ryzen 5 5600X) — the Ryzen 5 5600X offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Mobile (Core i9-11900KB) and AMD 500 series,AMD 400 series,AMD 300 series (Ryzen 5 5600X).

Feature	Core i9-11900KB	Ryzen 5 5600X
Socket	FCBGA1787	AM4
PCIe Generation	PCIe 3.0	PCIe 4.0+33%
Max RAM Speed	DDR4-3200	DDR4-3200
Max RAM Capacity	128 GB	128 GB
RAM Channels	2	2
ECC Support	No	Yes
PCIe Lanes	20	24+20%

🔧

Advanced Features

Both processors feature an unlocked multiplier for overclocking. Only the Core i9-11900KB supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: VT-x, VT-d (Core i9-11900KB) vs AMD-V (Ryzen 5 5600X). The Core i9-11900KB includes integrated graphics (Intel UHD Graphics), while the Ryzen 5 5600X requires a dedicated GPU. Primary use case: Ryzen 5 5600X targets Desktop.

Feature	Core i9-11900KB	Ryzen 5 5600X
Integrated GPU	Yes	No
IGPU Model	Intel UHD Graphics	—
Unlocked	Yes	Yes
AVX-512	Yes	No
Virtualization	VT-x, VT-d	AMD-V
Target Use	—	Desktop

💰

Value Analysis

At launch, the Core i9-11900KB was priced at $539, while the Ryzen 5 5600X came in at $299. On launch pricing ($539 vs $299), Ryzen 5 5600X was $240 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i9-11900KB delivers 42.1 pts/$ vs 73.1 pts/$ for the Ryzen 5 5600X — making the Ryzen 5 5600X the 53.8% better value option.

Feature	Core i9-11900KB	Ryzen 5 5600X
MSRP	$539	$299-45%
Performance per Dollar	42.1	73.1+74%
Release Date	2021	2020

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