Core i5-10400F vs Core i9-7940X

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 i5-10400F vs Core i9-7940X 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 i5-10400F vs Core i9-7940X: Pros, Cons & Final Verdict

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

Core i5-10400F

2020

Why buy it

✅Costs $1,239 less on MSRP ($160 MSRP vs $1,399 MSRP).
✅Delivers 347.6% more PassMark for each dollar spent, at 81.4 vs 18.2 PassMark/$ ($160 MSRP vs $1,399 MSRP).
✅Draws 65W instead of 165W, a 100W reduction.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Includes a boxed cooler (Yes), unlike Core i9-7940X.

Trade-offs

❌Worse for gaming: lower average FPS than Core i9-7940X across 50 shared CPU benchmark tests.
❌Lower PassMark (13,029 vs 25,452).
❌Smaller total L3 cache (12 MB vs 19 MB).

Core i9-7940X

2017

Why buy it

✅Better for gaming: +6.5% higher average FPS across 50 shared CPU benchmark tests.
✅+60.4% larger total L3 cache (19 MB vs 12 MB).

Trade-offs

❌Lower PassMark per dollar, at 18.2 vs 81.4 PassMark/$ ($1,399 MSRP vs $160 MSRP).
❌153.8% higher power demand at 165W vs 65W.
❌No boxed cooler included, unlike Core i5-10400F.

Quick Answers

So, is Core i9-7940X better than Core i5-10400F?

Yes. Core i9-7940X is the better all-around CPU here. It gives you a 6.5% average FPS lead across 50 shared CPU game tests in our data and 95.3% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Core i9-7940X is the better pick. According to our tests, it delivers 6.5% 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 i9-7940X is the stronger fit. You are getting 95.3% better PassMark, backed by 14 cores and 28 threads. It also has the larger cache pool with 60.4% larger total L3 cache (19 MB vs 12 MB).

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

Core i9-7940X is still the faster CPU overall, but Core i5-10400F is easier to justify if budget matters more than peak performance. Core i9-7940X comes in 774.4% more expensive on MSRP at $1,399 MSRP versus $160 MSRP, and it still gives you a 6.5% average FPS lead across 50 shared CPU game tests in our data. Core i5-10400F is also 347.6% better value on MSRP (81.4 vs 18.2 PassMark/$), which is why it can still make sense for tighter-budget builds on paper. That said, if you already own a compatible LGA1200 + DDR4 setup, Core i5-10400F can still make sense as a platform-matched option because it avoids a motherboard and RAM swap.

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

Core i5-10400F makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2020 vs 2017). That makes it the safer long-term bet.

Core i5-10400F vs Core i9-7940X Technical Specifications

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

Core i5-10400F

The Core i5-10400F is manufactured by Intel. It was released in 30 April 2020 (5 years ago). It is based on the Comet Lake (2020−2025) architecture. It features 6 cores and 12 threads. Base frequency is 2.9 GHz, with boost up to 4.3 GHz. L3 cache: 12 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1200. Thermal design power (TDP): 65 Watt. Memory support: DDR4. Passmark benchmark score: 13,029 points. Launch price was $155.

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.

⚡

Processing Power

The Core i5-10400F packs 6 cores / 12 threads, while the Core i9-7940X offers 14 cores / 28 threads — the Core i9-7940X has 8 more cores. Boost clocks reach 4.3 GHz on the Core i5-10400F versus 4.4 GHz on the Core i9-7940X — a 2.3% clock advantage for the Core i9-7940X (base: 2.9 GHz vs 3.1 GHz). The Core i5-10400F uses the Comet Lake (2020−2025) architecture (14 nm), while the Core i9-7940X uses Skylake (server) (2017−2018) (14 nm). In PassMark, the Core i5-10400F scores 13,029 against the Core i9-7940X's 25,452 — a 64.6% lead for the Core i9-7940X. L3 cache: 12 MB (total) on the Core i5-10400F vs 19.25 MB (total) on the Core i9-7940X.

Feature	Core i5-10400F	Core i9-7940X
Cores / Threads	6 / 12	14 / 28+133%
Boost Clock	4.3 GHz	4.4 GHz+2%
Base Clock	2.9 GHz	3.1 GHz+7%
L3 Cache	12 MB (total)	19.25 MB (total)+60%
L2 Cache	256K (per core)+25500%	1 MB (per core)
Process	14 nm	14 nm
Architecture	Comet Lake (2020−2025)	Skylake (server) (2017−2018)
PassMark	13,029	25,452+95%
Cinebench R23 Multi	8,191	—
Geekbench 6 Single	1,454	—
Geekbench 6 Multi	5,783	—

🧠

Memory & Platform

The Core i5-10400F uses the LGA1200 socket (PCIe 3.0), while the Core i9-7940X uses LGA2066 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Core i5-10400F	Core i9-7940X
Socket	LGA1200	LGA2066
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR4-2666	—
Max RAM Capacity	128 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	16	—

🔧

Advanced Features

Virtualization: VT-x, VT-d (Core i5-10400F) / not specified (Core i9-7940X). Primary use case: Core i5-10400F targets Gaming. Direct competitor: Core i5-10400F rivals Ryzen 5 3600.

Feature	Core i5-10400F	Core i9-7940X
Integrated GPU	No	—
Unlocked	No	—
AVX-512	No	—
Virtualization	VT-x, VT-d	—
Target Use	Gaming	—

💰

Value Analysis

At launch, the Core i5-10400F was priced at $160, while the Core i9-7940X came in at $1399. On launch pricing ($160 vs $1399), Core i5-10400F was $1239 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i5-10400F delivers 81.4 pts/$ vs 18.2 pts/$ for the Core i9-7940X — making the Core i5-10400F the 127% better value option.

Feature	Core i5-10400F	Core i9-7940X
MSRP	$160-89%	$1399
Performance per Dollar	81.4+347%	18.2
Release Date	2020	2017

Search Core i5-10400F on Amazon

Search Core i9-7940X on Amazon

Affiliate Disclosure

ChipVERSUS is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. We may earn a commission on qualifying purchases made through our links. This comes at no additional cost to you and helps support our work in providing comprehensive PC building guides and tools.

Amazon and the Amazon logo are trademarks of Amazon.com, Inc. or its affiliates.