Core i9-9940X vs Ryzen 7 7840H

Core i9-9940X vs Ryzen 7 7840H Performance Spectrum

Core i9-9940X

14 / 28

28,088

+0.9%

27,832

0.0%

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 i9-9940X vs Ryzen 7 7840H 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 i9-9940X vs Ryzen 7 7840H: Pros, Cons & Final Verdict

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

Core i9-9940X

2018

Why buy it

✅+0.9% higher PassMark.
✅+20.3% larger total L3 cache (19 MB vs 16 MB).
✅100+% more PCIe lanes (44 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 7 7840H across 50 shared CPU benchmark tests.
❌Launch MSRP is still $1,387 MSRP, while Ryzen 7 7840H mostly shows up through inconsistent older-market listings.
❌371.4% higher power demand at 165W vs 35W.
❌Older platform position on LGA2066 with DDR4, while Ryzen 7 7840H moves to FP8 and DDR5.

Ryzen 7 7840H

2023

Why buy it

✅Better for gaming: +30.8% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 35W instead of 165W, a 130W reduction.
✅Newer platform on FP8 with DDR5 support instead of LGA2066 and DDR4.

Trade-offs

❌Lower PassMark (27,832 vs 28,088).
❌Smaller total L3 cache (16 MB vs 19 MB).

Quick Answers

So, is Ryzen 7 7840H better than Core i9-9940X?

It depends on what you want from the system. For gaming, Ryzen 7 7840H is ahead with a 30.8% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core i9-9940X pulls ahead with 0.9% better PassMark. Core i9-9940X 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 i9-9940X is the stronger fit. You are getting 0.9% better PassMark, backed by 14 cores and 28 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 7 7840H is still the much better call for a fresh build. Ryzen 7 7840H comes in at an unclear MSRP at unclear MSRP versus $1,387 MSRP, and it still gives you a 30.8% average FPS lead across 50 shared CPU game tests in our data. Core i9-9940X only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2018 platform. Even with 100.0% better value on paper (20.3 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on LGA2066.

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

Ryzen 7 7840H makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2018) 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 i9-9940X vs Ryzen 7 7840H Technical Specifications

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

Core i9-9940X

The Core i9-9940X is manufactured by Intel. It was released in 19 October 2018 (7 years ago). It is based on the Skylake (server) (2017−2018) architecture. It features 14 cores and 28 threads. Base frequency is 3.3 GHz, with boost up to 4.5 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: DDR4-2666. Passmark benchmark score: 28,088 points. Launch price was $1,387.

Ryzen 7 7840H

The Ryzen 7 7840H is manufactured by AMD. It was released in Janeiro 2023 (2 years ago). It is based on the Phoenix (2023−2024) architecture. It features 8 cores and 16 threads. Base frequency is 3.8 GHz, with boost up to 5.1 GHz. L3 cache: 16 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: FP8. Thermal design power (TDP): 35 Watt. Memory support: DDR5-5600. Passmark benchmark score: 27,832 points. Launch price was $299.

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Processing Power

The Core i9-9940X packs 14 cores / 28 threads, while the Ryzen 7 7840H offers 8 cores / 16 threads — the Core i9-9940X has 6 more cores. Boost clocks reach 4.5 GHz on the Core i9-9940X versus 5.1 GHz on the Ryzen 7 7840H — a 12.5% clock advantage for the Ryzen 7 7840H (base: 3.3 GHz vs 3.8 GHz). The Core i9-9940X uses the Skylake (server) (2017−2018) architecture (14 nm), while the Ryzen 7 7840H uses Phoenix (2023−2024) (4 nm). In PassMark, the Core i9-9940X scores 28,088 against the Ryzen 7 7840H's 27,832 — a 0.9% lead for the Core i9-9940X. L3 cache: 19.25 MB (total) on the Core i9-9940X vs 16 MB (total) on the Ryzen 7 7840H.

Feature	Core i9-9940X	Ryzen 7 7840H
Cores / Threads	14 / 28+75%	8 / 16
Boost Clock	4.5 GHz	5.1 GHz+13%
Base Clock	3.3 GHz	3.8 GHz+15%
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	Skylake (server) (2017−2018)	Phoenix (2023−2024)
PassMark	28,088	27,832

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Memory & Platform

The Core i9-9940X uses the LGA2066 socket (PCIe 3.0), while the Ryzen 7 7840H uses FP8 (PCIe 4.0) — making them incompatible on the same motherboard.