Core i9-7940X vs Ryzen 7 5800

Core i9-7940X vs Ryzen 7 5800 Performance Spectrum

Core i9-7940X

14 / 28

25,452

0.0%

25,735

+1.1%

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

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 i9-7940X vs Ryzen 7 5800 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 i9-7940X vs Ryzen 7 5800: Pros, Cons & Final Verdict

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

Core i9-7940X

2017

Why buy it

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 7 5800 across 50 shared CPU benchmark tests.
❌Lower PassMark (25,452 vs 25,735).
❌Smaller total L3 cache (19 MB vs 32 MB).
❌Lower PassMark per dollar, at 18.2 vs 73.7 PassMark/$ ($1,399 MSRP vs $349 MSRP).
❌153.8% higher power demand at 165W vs 65W.

Ryzen 7 5800

2020

Why buy it

✅Better for gaming: +32.0% higher average FPS across 50 shared CPU benchmark tests.
✅+66.2% larger total L3 cache (32 MB vs 19 MB).
✅Costs $1,050 less on MSRP ($349 MSRP vs $1,399 MSRP).
✅Delivers 305.3% more PassMark for each dollar spent, at 73.7 vs 18.2 PassMark/$ ($349 MSRP vs $1,399 MSRP).
✅Draws 65W instead of 165W, a 100W reduction.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Quick Answers

So, is Ryzen 7 5800 better than Core i9-7940X?

Yes. Ryzen 7 5800 is the better all-around CPU here. It gives you a 32.0% average FPS lead across 50 shared CPU game tests in our data, 1.1% 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, Ryzen 7 5800 is the better pick. According to our tests, it delivers 32.0% 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, Ryzen 7 5800 is the stronger fit. You are getting 1.1% better PassMark, backed by 8 cores and 16 threads. It also has the larger cache pool with 66.2% larger total L3 cache (32 MB vs 19 MB).

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

Ryzen 7 5800 is the better buy right now. Ryzen 7 5800 comes in $1,050 cheaper on MSRP at $349 MSRP versus $1,399 MSRP, and it still gives you a 32.0% average FPS lead across 50 shared CPU game tests in our data. It is also 305.3% better value on MSRP (73.7 vs 18.2 PassMark/$), 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 7 5800 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2020 vs 2017), 66.2% larger total L3 cache (32 MB vs 19 MB), and more multi-core headroom with 8 cores / 16 threads instead of 14/28. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core i9-7940X vs Ryzen 7 5800 Technical Specifications

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

Core i9-7940X

The Core i9-7940X is manufactured by Intel. It was released in 1 September 2017 (8 years ago). It is based on the Skylake (server) (2017−2018) architecture. It features 14 cores and 28 threads. Base frequency is 3.1 GHz, with boost up to 4.4 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: 25,452 points. Launch price was $1,399.

Ryzen 7 5800

The Ryzen 7 5800 is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (2020−2025) architecture. It features 8 cores and 16 threads. Base frequency is 3.4 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: DDR4-3200. Passmark benchmark score: 25,735 points. Launch price was $299.

⚡

Processing Power

The Core i9-7940X packs 14 cores / 28 threads, while the Ryzen 7 5800 offers 8 cores / 16 threads — the Core i9-7940X has 6 more cores. Boost clocks reach 4.4 GHz on the Core i9-7940X versus 4.6 GHz on the Ryzen 7 5800 — a 4.4% clock advantage for the Ryzen 7 5800 (base: 3.1 GHz vs 3.4 GHz). The Core i9-7940X uses the Skylake (server) (2017−2018) architecture (14 nm), while the Ryzen 7 5800 uses Vermeer (2020−2025) (7 nm, 12 nm). In PassMark, the Core i9-7940X scores 25,452 against the Ryzen 7 5800's 25,735 — a 1.1% lead for the Ryzen 7 5800. L3 cache: 19.25 MB (total) on the Core i9-7940X vs 32 MB on the Ryzen 7 5800.

Feature	Core i9-7940X	Ryzen 7 5800
Cores / Threads	14 / 28+75%	8 / 16
Boost Clock	4.4 GHz	4.6 GHz+5%
Base Clock	3.1 GHz	3.4 GHz+10%
L3 Cache	19.25 MB (total)	32 MB+66%
L2 Cache	1 MB (per core)	512K (per core)+51100%
Process	14 nm	7 nm, 12 nm-50%
Architecture	Skylake (server) (2017−2018)	Vermeer (2020−2025)
PassMark	25,452	25,735+1%

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Memory & Platform

The Core i9-7940X uses the LGA2066 socket (PCIe 3.0), while the Ryzen 7 5800 uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard.

Feature	Core i9-7940X	Ryzen 7 5800
Socket	LGA2066	AM4
PCIe Generation	PCIe 3.0	PCIe 4.0+33%
Max RAM Speed	—	DDR4-3200
Max RAM Capacity	—	128 GB
RAM Channels	—	2
ECC Support	—	No
PCIe Lanes	—	24

🔧

Advanced Features

Virtualization: not specified (Core i9-7940X) / AMD-V (Ryzen 7 5800). Primary use case: Ryzen 7 5800 targets OEM Gaming.

Feature	Core i9-7940X	Ryzen 7 5800
Integrated GPU	—	No
Unlocked	—	Yes
AVX-512	—	No
Virtualization	—	AMD-V
Target Use	—	OEM Gaming

💰

Value Analysis

At launch, the Core i9-7940X was priced at $1399, while the Ryzen 7 5800 came in at $349. On launch pricing ($1399 vs $349), Ryzen 7 5800 was $1050 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i9-7940X delivers 18.2 pts/$ vs 73.7 pts/$ for the Ryzen 7 5800 — making the Ryzen 7 5800 the 120.8% better value option.

Feature	Core i9-7940X	Ryzen 7 5800
MSRP	$1399	$349-75%
Performance per Dollar	18.2	73.7+305%
Release Date	2017	2020

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