Core i9-10900X vs Ryzen 5 8645HS

Core i9-10900X vs Ryzen 5 8645HS Performance Spectrum

Core i9-10900X

10 / 20

22,377

+0.5%

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 i9-10900X 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 i9-10900X 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 i9-10900X

2019

Why buy it

✅+0.5% higher PassMark.
✅+20.3% larger total L3 cache (19 MB vs 16 MB).

Trade-offs

❌Launch MSRP is still $590 MSRP, while Ryzen 5 8645HS mostly shows up through inconsistent older-market listings.
❌266.7% higher power demand at 165W vs 45W.
❌Older platform position on LGA2066 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 165W, a 120W reduction.
✅Newer platform on FP8 with DDR5 support instead of LGA2066 and DDR4.
✅100+% more PCIe lanes (20 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Radeon 760M, while Core i9-10900X needs a discrete GPU.

Trade-offs

❌Lower PassMark (22,257 vs 22,377).
❌Smaller total L3 cache (16 MB vs 19 MB).

Quick Answers

So, is Ryzen 5 8645HS better than Core i9-10900X?

It depends on what you want from the system. For gaming, Ryzen 5 8645HS is ahead with a 0.5% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core i9-10900X pulls ahead with 0.5% better PassMark. Core i9-10900X also has the bigger cache pool with 20.3% larger total L3 cache (19 MB vs 16 MB).

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

For streaming, content creation, and heavier multitasking, Core i9-10900X is the stronger fit. You are getting 0.5% better PassMark, backed by 10 cores and 20 threads. It also has the larger cache pool with 20.3% larger total L3 cache (19 MB vs 16 MB).

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

Ryzen 5 8645HS is still the faster CPU overall, but Core i9-10900X is easier to justify if budget matters more than peak performance. Ryzen 5 8645HS comes in at an unclear MSRP at unclear MSRP versus $590 MSRP, and it still gives you a 0.5% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Core i9-10900X is still stronger for heavier multi-core work with 0.5% better PassMark. Core i9-10900X is also 100.0% better value on MSRP (37.9 vs 0.0 PassMark/$), which is why it can still make sense for tighter-budget builds on paper.

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

Ryzen 5 8645HS makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2019) and a healthier platform with FP8 and DDR5 instead of LGA2066. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i9-10900X vs Ryzen 5 8645HS Technical Specifications

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

Core i9-10900X

The Core i9-10900X is manufactured by Intel. It was released in 19 October 2019 (6 years ago). It is based on the Cascade Lake-X (2019) architecture. It features 10 cores and 20 threads. Base frequency is 3.7 GHz, with boost up to 4.7 GHz. L3 cache: 19.25 MB (total). L2 cache: 1 MB (per core). Built on 14 nm process technology. Socket: LGA2066. Thermal design power (TDP): 165 Watt. Memory support: DDR4-2933. Passmark benchmark score: 22,377 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 i9-10900X packs 10 cores / 20 threads, while the Ryzen 5 8645HS offers 6 cores / 12 threads — the Core i9-10900X has 4 more cores. Boost clocks reach 4.7 GHz on the Core i9-10900X versus 5 GHz on the Ryzen 5 8645HS — a 6.2% clock advantage for the Ryzen 5 8645HS (base: 3.7 GHz vs 4.3 GHz). The Core i9-10900X uses the Cascade Lake-X (2019) architecture (14 nm), while the Ryzen 5 8645HS uses Hawk Point-HS (Zen 4) (2023−2024) (4 nm). In PassMark, the Core i9-10900X scores 22,377 against the Ryzen 5 8645HS's 22,257 — a 0.5% lead for the Core i9-10900X. L3 cache: 19.25 MB (total) on the Core i9-10900X vs 16 MB (total) on the Ryzen 5 8645HS.

Feature	Core i9-10900X	Ryzen 5 8645HS
Cores / Threads	10 / 20+67%	6 / 12
Boost Clock	4.7 GHz	5 GHz+6%
Base Clock	3.7 GHz	4.3 GHz+16%
L3 Cache	19.25 MB (total)+20%	16 MB (total)
L2 Cache	1 MB (per core)	1 MB (per core)
Process	14 nm	4 nm-71%
Architecture	Cascade Lake-X (2019)	Hawk Point-HS (Zen 4) (2023−2024)
PassMark	22,377	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 i9-10900X uses the LGA2066 socket (PCIe 3.0), while the Ryzen 5 8645HS uses FP8 (PCIe 4.0) — making them incompatible on the same motherboard.

Feature	Core i9-10900X	Ryzen 5 8645HS
Socket	LGA2066	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

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Advanced Features

Virtualization: not specified (Core i9-10900X) / AMD-V (SVM) (Ryzen 5 8645HS). The Ryzen 5 8645HS includes integrated graphics (Radeon 760M), while the Core i9-10900X requires a dedicated GPU. Primary use case: Ryzen 5 8645HS targets Gaming. Direct competitor: Ryzen 5 8645HS rivals Core i5-13500H.