Core i7-9700K 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 i7-9700K 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 i7-9700K 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 i7-9700K

2018

Why buy it

✅Better for gaming: +21.9% higher average FPS across 50 shared CPU benchmark tests.
✅Costs $1,014 less on MSRP ($385 MSRP vs $1,399 MSRP).
✅Delivers 105.5% more PassMark for each dollar spent, at 37.4 vs 18.2 PassMark/$ ($385 MSRP vs $1,399 MSRP).
✅Draws 95W instead of 165W, a 70W reduction.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (14,397 vs 25,452).
❌Smaller total L3 cache (12 MB vs 19 MB).

Core i9-7940X

2017

Why buy it

✅+76.8% higher PassMark.
✅+60.4% larger total L3 cache (19 MB vs 12 MB).

Trade-offs

❌Worse for gaming: lower average FPS than Core i7-9700K across 50 shared CPU benchmark tests.
❌Lower PassMark per dollar, at 18.2 vs 37.4 PassMark/$ ($1,399 MSRP vs $385 MSRP).
❌73.7% higher power demand at 165W vs 95W.
❌No integrated graphics, while Core i7-9700K can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Core i7-9700K better than Core i9-7940X?

It depends on what you want from the system. For gaming, Core i7-9700K is ahead with a 21.9% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core i9-7940X pulls ahead with 76.8% better PassMark. Core i9-7940X also has the bigger cache pool with 60.4% larger total L3 cache (19 MB vs 12 MB).

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 76.8% 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 i7-9700K is the better buy right now. Core i7-9700K comes in $1,014 cheaper on MSRP at $385 MSRP versus $1,399 MSRP, and it still gives you a 21.9% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Core i9-7940X is still stronger for heavier multi-core work with 76.8% better PassMark. It is also 105.5% better value on MSRP (37.4 vs 18.2 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Core i7-9700K makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2018 vs 2017). That makes it the safer long-term bet.

Core i7-9700K vs Core i9-7940X Technical Specifications

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

Core i7-9700K

The Core i7-9700K is manufactured by Intel. It was released in 19 October 2018 (7 years ago). It is based on the Coffee Lake-R (2018−2019) architecture. It features 8 cores and 8 threads. Base frequency is 3.6 GHz, with boost up to 4.9 GHz. L3 cache: 12 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 95 Watt. Memory support: DDR4. Passmark benchmark score: 14,397 points. Launch price was $374.

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.

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Processing Power

The Core i7-9700K packs 8 cores / 8 threads, while the Core i9-7940X offers 14 cores / 28 threads — the Core i9-7940X has 6 more cores. Boost clocks reach 4.9 GHz on the Core i7-9700K versus 4.4 GHz on the Core i9-7940X — a 10.8% clock advantage for the Core i7-9700K (base: 3.6 GHz vs 3.1 GHz). The Core i7-9700K uses the Coffee Lake-R (2018−2019) architecture (14 nm), while the Core i9-7940X uses Skylake (server) (2017−2018) (14 nm). In PassMark, the Core i7-9700K scores 14,397 against the Core i9-7940X's 25,452 — a 55.5% lead for the Core i9-7940X. L3 cache: 12 MB (total) on the Core i7-9700K vs 19.25 MB (total) on the Core i9-7940X.

Feature	Core i7-9700K	Core i9-7940X
Cores / Threads	8 / 8	14 / 28+75%
Boost Clock	4.9 GHz+11%	4.4 GHz
Base Clock	3.6 GHz+16%	3.1 GHz
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	Coffee Lake-R (2018−2019)	Skylake (server) (2017−2018)
PassMark	14,397	25,452+77%

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Memory & Platform

The Core i7-9700K uses the LGA1151 socket (PCIe 3.0), while the Core i9-7940X uses LGA2066 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Core i7-9700K	Core i9-7940X
Socket	LGA1151	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	—

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Advanced Features

Virtualization: VT-x, VT-d (Core i7-9700K) / not specified (Core i9-7940X). The Core i7-9700K includes integrated graphics (UHD Graphics 630), while the Core i9-7940X requires a dedicated GPU. Primary use case: Core i7-9700K targets Desktop.

Feature	Core i7-9700K	Core i9-7940X
Integrated GPU	Yes	—
IGPU Model	UHD Graphics 630	—
Unlocked	Yes	—
AVX-512	No	—
Virtualization	VT-x, VT-d	—
Target Use	Desktop	—

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Value Analysis

At launch, the Core i7-9700K was priced at $385, while the Core i9-7940X came in at $1399. On launch pricing ($385 vs $1399), Core i7-9700K was $1014 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i7-9700K delivers 37.4 pts/$ vs 18.2 pts/$ for the Core i9-7940X — making the Core i7-9700K the 69.1% better value option.

Feature	Core i7-9700K	Core i9-7940X
MSRP	$385-72%	$1399
Performance per Dollar	37.4+105%	18.2
Release Date	2018	2017

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