Core i7-3840QM vs Core i7-9700K

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 i7-3840QM vs Core i7-9700K 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 i7-3840QM vs Core i7-9700K: Pros, Cons & Final Verdict

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

Core i7-3840QM

2012

Why buy it

✅Draws 45W instead of 95W, a 50W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Core i7-9700K across 50 shared CPU benchmark tests.
❌Lower PassMark (5,871 vs 14,397).
❌Smaller total L3 cache (8 MB vs 12 MB).

Core i7-9700K

2018

Why buy it

✅Better for gaming: +98.4% higher average FPS across 50 shared CPU benchmark tests.
✅+50% larger total L3 cache (12 MB vs 8 MB).

Trade-offs

❌Launch MSRP is still $385 MSRP, while Core i7-3840QM mostly shows up through inconsistent older-market listings.
❌111.1% higher power demand at 95W vs 45W.

Quick Answers

So, is Core i7-9700K better than Core i7-3840QM?

Yes. Core i7-9700K is the better all-around CPU here. It gives you a 98.4% average FPS lead across 50 shared CPU game tests in our data, 145.2% 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 i7-9700K is the better pick. According to our tests, it delivers 98.4% 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 i7-9700K is the stronger fit. You are getting 145.2% better PassMark, backed by 8 cores and 8 threads. It also has the larger cache pool with 50% larger total L3 cache (12 MB vs 8 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 at an unclear MSRP at $385 MSRP versus unclear MSRP, and it still gives you a 98.4% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (37.4 vs 0.0 PassMark/$), 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 2012), 50% larger total L3 cache (12 MB vs 8 MB), and more multi-core headroom with 8 cores / 8 threads instead of 4/8. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core i7-3840QM vs Core i7-9700K Technical Specifications

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

Core i7-3840QM

The Core i7-3840QM is manufactured by Intel. It was released in 3 September 2012 (13 years ago). It is based on the Ivy Bridge (2012−2013) architecture. It features 4 cores and 8 threads. Base frequency is 2.8 GHz, with boost up to 3.8 GHz. L3 cache: 8 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: PGA988. Thermal design power (TDP): 45 Watt. Memory support: DDR3. Passmark benchmark score: 5,871 points. Launch price was $568.

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.

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Processing Power

The Core i7-3840QM packs 4 cores / 8 threads, while the Core i7-9700K offers 8 cores / 8 threads — the Core i7-9700K has 4 more cores. Boost clocks reach 3.8 GHz on the Core i7-3840QM versus 4.9 GHz on the Core i7-9700K — a 25.3% clock advantage for the Core i7-9700K (base: 2.8 GHz vs 3.6 GHz). The Core i7-3840QM uses the Ivy Bridge (2012−2013) architecture (22 nm), while the Core i7-9700K uses Coffee Lake-R (2018−2019) (14 nm). In PassMark, the Core i7-3840QM scores 5,871 against the Core i7-9700K's 14,397 — a 84.1% lead for the Core i7-9700K. L3 cache: 8 MB (total) on the Core i7-3840QM vs 12 MB (total) on the Core i7-9700K.

Feature	Core i7-3840QM	Core i7-9700K
Cores / Threads	4 / 8	8 / 8+100%
Boost Clock	3.8 GHz	4.9 GHz+29%
Base Clock	2.8 GHz	3.6 GHz+29%
L3 Cache	8 MB (total)	12 MB (total)+50%
L2 Cache	256K (per core)	256K (per core)
Process	22 nm	14 nm-36%
Architecture	Ivy Bridge (2012−2013)	Coffee Lake-R (2018−2019)
PassMark	5,871	14,397+145%
Geekbench 6 Single	676	—

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Memory & Platform

The Core i7-3840QM uses the PGA988 socket (PCIe 3.0), while the Core i7-9700K uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1600 on the Core i7-3840QM versus DDR4-2666 on the Core i7-9700K — the Core i7-9700K supports 66.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i7-9700K supports up to 128 GB of RAM compared to 32 GB — 300% more capacity for professional workloads. Both feature 2-channel memory with ECC support. Both provide 16 PCIe lanes. Chipset compatibility: HM75,HM76,HM77,QM77,QS77 (Core i7-3840QM) and Intel 300 series (Core i7-9700K).

Feature	Core i7-3840QM	Core i7-9700K
Socket	PGA988	LGA1151
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR3-1600	DDR4-2666+67%
Max RAM Capacity	32 GB	128 GB+300%
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	16	16

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Advanced Features

Only the Core i7-9700K has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: VT-x, VT-d, EPT (Core i7-3840QM) vs VT-x, VT-d (Core i7-9700K). Both include integrated graphics — HD Graphics 4000 (Core i7-3840QM) and UHD Graphics 630 (Core i7-9700K) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Core i7-3840QM targets Mobile Workstation, Core i7-9700K targets Desktop. Direct competitor: Core i7-3840QM rivals A10-5750M.

Feature	Core i7-3840QM	Core i7-9700K
Integrated GPU	Yes	Yes
IGPU Model	HD Graphics 4000	UHD Graphics 630
Unlocked	No	Yes
AVX-512	No	No
Virtualization	VT-x, VT-d, EPT	VT-x, VT-d
Target Use	Mobile Workstation	Desktop