Core i9-7940X vs Core i9-12900HK

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 Core i9-12900HK 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 Core i9-12900HK: 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 Core i9-12900HK across 50 shared CPU benchmark tests.
❌Lower PassMark (25,452 vs 25,512).
❌Smaller total L3 cache (19 MB vs 24 MB).
❌Launch MSRP is still $1,399 MSRP, while Core i9-12900HK mostly shows up through inconsistent older-market listings.
❌266.7% higher power demand at 165W vs 45W.

Core i9-12900HK

2022

Why buy it

✅Better for gaming: +26.4% higher average FPS across 50 shared CPU benchmark tests.
✅+24.7% larger total L3 cache (24 MB vs 19 MB).
✅Draws 45W instead of 165W, a 120W reduction.
✅Newer platform on FCBGA1744 with DDR5 support instead of LGA2066 and DDR4.
✅100+% more PCIe lanes (28 vs 0) for storage and expansion-heavy builds.

Trade-offs

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

Quick Answers

So, is Core i9-12900HK better than Core i9-7940X?

Yes. Core i9-12900HK is the better all-around CPU here. It gives you a 26.4% average FPS lead across 50 shared CPU game tests in our data, 0.2% 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, Core i9-12900HK is the better pick. According to our tests, it delivers 26.4% 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 i9-12900HK is the stronger fit. You are getting 0.2% better PassMark, backed by 14 cores and 20 threads. It also has the larger cache pool with 24.7% larger total L3 cache (24 MB vs 19 MB).

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

Core i9-12900HK is still the much better call for a fresh build. Core i9-12900HK comes in at an unclear MSRP at unclear MSRP versus $1,399 MSRP, and it still gives you a 26.4% average FPS lead across 50 shared CPU game tests in our data. Core i9-7940X only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2017 platform. Even with 100.0% better value on paper (18.2 vs 0.0 PassMark/$), 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?

Core i9-12900HK makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2022 vs 2017), a healthier platform with FCBGA1744 and DDR5 instead of LGA2066, 24.7% larger total L3 cache (24 MB vs 19 MB), and more multi-core headroom with 14 cores / 20 threads instead of 14/28. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i9-7940X vs Core i9-12900HK 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.

Core i9-12900HK

The Core i9-12900HK is manufactured by Intel. It was released in 4 January 2022 (3 years ago). It is based on the Alder Lake-H (2022) architecture. It features 14 cores and 20 threads. Base frequency is 2.5 GHz, with boost up to 5 GHz. L3 cache: 24 MB (total). L2 cache: 1.25 MB (per core). Built on Intel 7 nm process technology. Socket: FCBGA1744. Thermal design power (TDP): 45 Watt. Memory support: DDR4, DDR5. Passmark benchmark score: 25,512 points. Launch price was $299.

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Processing Power

The Core i9-7940X packs 14 cores / 28 threads, matching the Core i9-12900HK's 14 cores. Boost clocks reach 4.4 GHz on the Core i9-7940X versus 5 GHz on the Core i9-12900HK — a 12.8% clock advantage for the Core i9-12900HK (base: 3.1 GHz vs 2.5 GHz). The Core i9-7940X uses the Skylake (server) (2017−2018) architecture (14 nm), while the Core i9-12900HK uses Alder Lake-H (2022) (Intel 7 nm). In PassMark, the Core i9-7940X scores 25,452 against the Core i9-12900HK's 25,512 — a 0.2% lead for the Core i9-12900HK. L3 cache: 19.25 MB (total) on the Core i9-7940X vs 24 MB (total) on the Core i9-12900HK.

Feature	Core i9-7940X	Core i9-12900HK
Cores / Threads	14 / 28	14 / 20
Boost Clock	4.4 GHz	5 GHz+14%
Base Clock	3.1 GHz+24%	2.5 GHz
L3 Cache	19.25 MB (total)	24 MB (total)+25%
L2 Cache	1 MB (per core)	1.25 MB (per core)+25%
Process	14 nm	Intel 7 nm-50%
Architecture	Skylake (server) (2017−2018)	Alder Lake-H (2022)
PassMark	25,452	25,512
Cinebench R23 Multi	—	18,197
Geekbench 6 Single	—	1,938
Geekbench 6 Multi	—	13,317

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Memory & Platform

The Core i9-7940X uses the LGA2066 socket (PCIe 3.0), while the Core i9-12900HK uses FCBGA1744 (PCIe 5.0) — making them incompatible on the same motherboard.

Feature	Core i9-7940X	Core i9-12900HK
Socket	LGA2066	FCBGA1744
PCIe Generation	PCIe 3.0	PCIe 5.0+67%
Max RAM Speed	—	DDR5-4800, DDR4-3200
Max RAM Capacity	—	64 GB
RAM Channels	—	2
ECC Support	—	No
PCIe Lanes	—	28

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Advanced Features

Virtualization: not specified (Core i9-7940X) / VT-x, VT-d, EPT (Core i9-12900HK). The Core i9-12900HK includes integrated graphics (Iris Xe Graphics G7 (96EUs)), while the Core i9-7940X requires a dedicated GPU. Primary use case: Core i9-12900HK targets Enthusiast Gaming Laptop. Direct competitor: Core i9-12900HK rivals Ryzen 9 6900HX.

Feature	Core i9-7940X	Core i9-12900HK
Integrated GPU	—	Yes
IGPU Model	—	Iris Xe Graphics G7 (96EUs)
Unlocked	—	Yes
AVX-512	—	No
Virtualization	—	VT-x, VT-d, EPT
Target Use	—	Enthusiast Gaming Laptop