Core i9-7920X vs Ryzen 7 7840S

Core i9-7920X vs Ryzen 7 7840S Performance Spectrum

Core i9-7920X

12 / 24

23,508

+0.9%

23,290

0.0%

Ryzen Threadripper PRO 5945WX

Ryzen 9 7945HX3D

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 i9-7920X vs Ryzen 7 7840S 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 i9-7920X vs Ryzen 7 7840S: Pros, Cons & Final Verdict

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

Core i9-7920X

2017

Why buy it

✅+0.9% higher PassMark.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 7 7840S across 50 shared CPU benchmark tests.
❌Launch MSRP is still $1,199 MSRP, while Ryzen 7 7840S mostly shows up through inconsistent older-market listings.
❌1650% higher power demand at 140W vs 8W.
❌Older platform position on LGA2066 with DDR4, while Ryzen 7 7840S moves to FP7/FP7r2/FP8 and DDR5.
❌No integrated graphics, while Ryzen 7 7840S can still boot and troubleshoot without a discrete GPU.

Ryzen 7 7840S

2023

Why buy it

✅Better for gaming: +37.5% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 8W instead of 140W, a 132W reduction.
✅Newer platform on FP7/FP7r2/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 780M, while Core i9-7920X needs a discrete GPU.

Trade-offs

❌Lower PassMark (23,290 vs 23,508).

Quick Answers

So, is Ryzen 7 7840S better than Core i9-7920X?

It depends on what you want from the system. For gaming, Ryzen 7 7840S is ahead with a 37.5% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core i9-7920X pulls ahead with 0.9% better PassMark.

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

For streaming, content creation, and heavier multitasking, Core i9-7920X is the stronger fit. You are getting 0.9% better PassMark, backed by 12 cores and 24 threads.

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

Ryzen 7 7840S is still the much better call for a fresh build. Ryzen 7 7840S comes in at an unclear MSRP at unclear MSRP versus $1,199 MSRP, and it still gives you a 37.5% average FPS lead across 50 shared CPU game tests in our data. Core i9-7920X only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2017 platform. Even with 100.0% better value on paper (19.6 vs 0.0 PassMark/$), 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 7840S makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2017) and a healthier platform with FP7/FP7r2/FP8 and DDR5 instead of LGA2066. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i9-7920X vs Ryzen 7 7840S Technical Specifications

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

Core i9-7920X

The Core i9-7920X is manufactured by Intel. It was released in 10 September 2017 (8 years ago). It is based on the Skylake (server) (2017−2018) architecture. It features 12 cores and 24 threads. Base frequency is 2.9 GHz, with boost up to 4.4 GHz. L3 cache: 16.5 MB (total). L2 cache: 1 MB (per core). Built on 14 nm process technology. Socket: LGA2066. Thermal design power (TDP): 140 Watt. Memory support: DDR4-2666. Passmark benchmark score: 23,508 points. Launch price was $1,199.

Ryzen 7 7840S

The Ryzen 7 7840S is manufactured by AMD. It was released in 5 January 2023 (2 years ago). It is based on the Phoenix-HS (Zen 4) (2023) 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. L2 cache: 8 MB. Built on 4 nm process technology. Socket: FP7/FP7r2/FP8. Thermal design power (TDP): 8 MB + 16 MB. Memory support: DDR5. Passmark benchmark score: 23,290 points. Launch price was $299.

⚡

Processing Power

The Core i9-7920X packs 12 cores / 24 threads, while the Ryzen 7 7840S offers 8 cores / 16 threads — the Core i9-7920X has 4 more cores. Boost clocks reach 4.4 GHz on the Core i9-7920X versus 5.1 GHz on the Ryzen 7 7840S — a 14.7% clock advantage for the Ryzen 7 7840S (base: 2.9 GHz vs 3.8 GHz). The Core i9-7920X uses the Skylake (server) (2017−2018) architecture (14 nm), while the Ryzen 7 7840S uses Phoenix-HS (Zen 4) (2023) (4 nm). In PassMark, the Core i9-7920X scores 23,508 against the Ryzen 7 7840S's 23,290 — a 0.9% lead for the Core i9-7920X. L3 cache: 16.5 MB (total) on the Core i9-7920X vs 16 MB on the Ryzen 7 7840S.

Feature	Core i9-7920X	Ryzen 7 7840S
Cores / Threads	12 / 24+50%	8 / 16
Boost Clock	4.4 GHz	5.1 GHz+16%
Base Clock	2.9 GHz	3.8 GHz+31%
L3 Cache	16.5 MB (total)+3%	16 MB
L2 Cache	1 MB (per core)	8 MB+700%
Process	14 nm	4 nm-71%
Architecture	Skylake (server) (2017−2018)	Phoenix-HS (Zen 4) (2023)
PassMark	23,508	23,290
Cinebench R23 Multi	—	13,500
Geekbench 6 Single	—	2,570
Geekbench 6 Multi	—	13,535

🧠

Memory & Platform

The Core i9-7920X uses the LGA2066 socket (PCIe 3.0), while the Ryzen 7 7840S uses FP7/FP7r2/FP8 (PCIe 4.0) — making them incompatible on the same motherboard.

Feature	Core i9-7920X	Ryzen 7 7840S
Socket	LGA2066	FP7/FP7r2/FP8
PCIe Generation	PCIe 3.0	PCIe 4.0+33%
Max RAM Speed	—	DDR5-5600, LPDDR5x-7500
Max RAM Capacity	—	256 GB
RAM Channels	—	2
ECC Support	—	Yes
PCIe Lanes	—	20

🔧

Advanced Features

Virtualization: not specified (Core i9-7920X) / AMD-V (SVM) (Ryzen 7 7840S). The Ryzen 7 7840S includes integrated graphics (Radeon 780M), while the Core i9-7920X requires a dedicated GPU. Primary use case: Ryzen 7 7840S targets Gaming. Direct competitor: Ryzen 7 7840S rivals Core i7-1360P.