Core i9-11900 vs Ryzen 5 8645HS

Core i9-11900 vs Ryzen 5 8645HS Performance Spectrum

Core i9-11900

8 / 16

22,422

+0.7%

22,257

0.0%

Ryzen Threadripper PRO 3955WX

Ryzen 9 9900X3D

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 i9-11900 vs Ryzen 5 8645HS 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 i9-11900 vs Ryzen 5 8645HS: Pros, Cons & Final Verdict

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

Core i9-11900

2021

Why buy it

✅Better for gaming: +3.1% higher average FPS across 50 shared CPU benchmark tests.

Trade-offs

❌Launch MSRP is still $439 MSRP, while Ryzen 5 8645HS mostly shows up through inconsistent older-market listings.
❌44.4% higher power demand at 65W vs 45W.
❌Older platform position on LGA1200 with DDR4, while Ryzen 5 8645HS moves to FP8 and DDR5.
❌No integrated graphics, while Ryzen 5 8645HS can still boot and troubleshoot without a discrete GPU.

Ryzen 5 8645HS

2023

Why buy it

✅Draws 45W instead of 65W, a 20W reduction.
✅Newer platform on FP8 with DDR5 support instead of LGA1200 and DDR4.
✅100+% more PCIe lanes (20 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Radeon 760M, while Core i9-11900 needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Core i9-11900 across 50 shared CPU benchmark tests.
❌Lower PassMark (22,257 vs 22,422).

Quick Answers

So, is Core i9-11900 better than Ryzen 5 8645HS?

Yes. Core i9-11900 is the better all-around CPU here. It gives you a 3.1% average FPS lead across 50 shared CPU game tests in our data and 0.7% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Core i9-11900 is the better pick. According to our tests, it delivers 3.1% 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, Core i9-11900 is the stronger fit. You are getting 0.7% better PassMark, backed by 8 cores and 16 threads.

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

Core i9-11900 is the better buy right now. Core i9-11900 comes in at an unclear MSRP at $439 MSRP versus unclear MSRP, and it still gives you a 3.1% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (51.1 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Ryzen 5 8645HS makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2021) and a healthier platform with FP8 and DDR5 instead of LGA1200. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i9-11900 vs Ryzen 5 8645HS Technical Specifications

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

Core i9-11900

The Core i9-11900 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 2.5 GHz, with boost up to 5.1 GHz. L3 cache: 16 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1200. Thermal design power (TDP): 65 Watt. Memory support: DDR4-3200. Passmark benchmark score: 22,422 points. Launch price was $299.

Ryzen 5 8645HS

The Ryzen 5 8645HS is manufactured by AMD. It was released in 6 December 2023 (1 year ago). It is based on the Hawk Point-HS (Zen 4) (2023−2024) architecture. It features 6 cores and 12 threads. Base frequency is 4.3 GHz, with boost up to 5 GHz. L3 cache: 16 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: FP8. Thermal design power (TDP): 45 Watt. Memory support: DDR5. Passmark benchmark score: 22,257 points. Launch price was $299.

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Processing Power

The Core i9-11900 packs 8 cores / 16 threads, while the Ryzen 5 8645HS offers 6 cores / 12 threads — the Core i9-11900 has 2 more cores. Boost clocks reach 5.1 GHz on the Core i9-11900 versus 5 GHz on the Ryzen 5 8645HS — a 2% clock advantage for the Core i9-11900 (base: 2.5 GHz vs 4.3 GHz). The Core i9-11900 uses the Rocket Lake (2021) architecture (14 nm), while the Ryzen 5 8645HS uses Hawk Point-HS (Zen 4) (2023−2024) (4 nm). In PassMark, the Core i9-11900 scores 22,422 against the Ryzen 5 8645HS's 22,257 — a 0.7% lead for the Core i9-11900. Both processors carry 16 MB (total) of L3 cache.

Feature	Core i9-11900	Ryzen 5 8645HS
Cores / Threads	8 / 16+33%	6 / 12
Boost Clock	5.1 GHz+2%	5 GHz
Base Clock	2.5 GHz	4.3 GHz+72%
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)	Hawk Point-HS (Zen 4) (2023−2024)
PassMark	22,422	22,257
Cinebench R23 Multi	—	13,316
Geekbench 6 Single	—	2,574
Geekbench 6 Multi	—	10,675

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Memory & Platform

The Core i9-11900 uses the LGA1200 socket (PCIe 3.0), while the Ryzen 5 8645HS uses FP8 (PCIe 4.0) — making them incompatible on the same motherboard.

Feature	Core i9-11900	Ryzen 5 8645HS
Socket	LGA1200	FP8
PCIe Generation	PCIe 3.0	PCIe 4.0+33%
Max RAM Speed	—	LPDDR5x-7500
Max RAM Capacity	—	256 GB
RAM Channels	—	2
ECC Support	—	Yes
PCIe Lanes	—	20

🔧

Advanced Features

Virtualization: not specified (Core i9-11900) / AMD-V (SVM) (Ryzen 5 8645HS). The Ryzen 5 8645HS includes integrated graphics (Radeon 760M), while the Core i9-11900 requires a dedicated GPU. Primary use case: Ryzen 5 8645HS targets Gaming. Direct competitor: Ryzen 5 8645HS rivals Core i5-13500H.