Core i7-9700K vs Ryzen 7 7840S

CPU

GPU

Core i7-9700K

8 Cores8 Thrd95 WWMax: 4.9 GHz2018

Similar parts

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Ryzen 7 7840S

8 Cores16 Thrd8 WWMax: 5.1 GHz2023

Ryzen family

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Core i7-9700K vs Ryzen 7 7840S Performance Spectrum

Core i7-9700K

8 / 8

14,397

0.0%

23,290

+61.8%

Ryzen Threadripper PRO 5945WX

Ryzen 9 7945HX3D

Ryzen Threadripper PRO 5975WX

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 i7-9700K vs Ryzen 7 7840S 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 Ryzen 7 7840S: 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

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 7 7840S across 50 shared CPU benchmark tests.
❌Lower PassMark (14,397 vs 23,290).
❌Smaller total L3 cache (12 MB vs 16 MB).
❌Launch MSRP is still $385 MSRP, while Ryzen 7 7840S mostly shows up through inconsistent older-market listings.
❌1087.5% higher power demand at 95W vs 8W.

Ryzen 7 7840S

2023

Why buy it

✅Better for gaming: +10.5% higher average FPS across 50 shared CPU benchmark tests.
✅+33.3% larger total L3 cache (16 MB vs 12 MB).
✅Draws 8W instead of 95W, a 87W reduction.
✅Newer platform on FP7/FP7r2/FP8 with DDR5 support instead of LGA1151 and DDR4.
✅25% more PCIe lanes (20 vs 16) for storage and expansion-heavy builds.

Trade-offs

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

Quick Answers

So, is Ryzen 7 7840S better than Core i7-9700K?

Yes. Ryzen 7 7840S is the better all-around CPU here. It gives you a 10.5% average FPS lead across 50 shared CPU game tests in our data, 61.8% 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 7840S is the better pick. According to our tests, it delivers 10.5% 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, Ryzen 7 7840S is the stronger fit. You are getting 61.8% better PassMark, backed by 8 cores and 16 threads. It also has the larger cache pool with 33.3% larger total L3 cache (16 MB vs 12 MB).

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

Ryzen 7 7840S is still the much better call for a fresh build. Ryzen 7 7840S comes in at an unclear MSRP at unclear MSRP versus $385 MSRP, and it still gives you a 10.5% average FPS lead across 50 shared CPU game tests in our data. Core i7-9700K only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2018 platform. Even with 100.0% better value on paper (37.4 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on LGA1151.

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

Ryzen 7 7840S makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2018), a healthier platform with FP7/FP7r2/FP8 and DDR5 instead of LGA1151, 33.3% larger total L3 cache (16 MB vs 12 MB), and more multi-core headroom with 8 cores / 16 threads instead of 8/8. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i7-9700K vs Ryzen 7 7840S 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.

Ryzen 7 7840S

The Ryzen 7 7840S is manufactured by AMD. It was released in 5 January 2023 (2 years ago). It is based on the Phoenix-HS (Zen 4) (2023) architecture. It features 8 cores and 16 threads. Base frequency is 3.8 GHz, with boost up to 5.1 GHz. L3 cache: 16 MB. L2 cache: 8 MB. Built on 4 nm process technology. Socket: FP7/FP7r2/FP8. Thermal design power (TDP): 8 MB + 16 MB. Memory support: DDR5. Passmark benchmark score: 23,290 points. Launch price was $299.

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Processing Power

The Core i7-9700K packs 8 cores / 8 threads, matching the Ryzen 7 7840S's 8 cores. Boost clocks reach 4.9 GHz on the Core i7-9700K versus 5.1 GHz on the Ryzen 7 7840S — a 4% clock advantage for the Ryzen 7 7840S (base: 3.6 GHz vs 3.8 GHz). The Core i7-9700K uses the Coffee Lake-R (2018−2019) architecture (14 nm), while the Ryzen 7 7840S uses Phoenix-HS (Zen 4) (2023) (4 nm). In PassMark, the Core i7-9700K scores 14,397 against the Ryzen 7 7840S's 23,290 — a 47.2% lead for the Ryzen 7 7840S. L3 cache: 12 MB (total) on the Core i7-9700K vs 16 MB on the Ryzen 7 7840S.

Feature	Core i7-9700K	Ryzen 7 7840S
Cores / Threads	8 / 8	8 / 16
Boost Clock	4.9 GHz	5.1 GHz+4%
Base Clock	3.6 GHz	3.8 GHz+6%
L3 Cache	12 MB (total)	16 MB+33%
L2 Cache	256K (per core)+3100%	8 MB
Process	14 nm	4 nm-71%
Architecture	Coffee Lake-R (2018−2019)	Phoenix-HS (Zen 4) (2023)
PassMark	14,397	23,290+62%
Cinebench R23 Multi	—	13,500
Geekbench 6 Single	—	2,570
Geekbench 6 Multi	—	13,535

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Memory & Platform

The Core i7-9700K uses the LGA1151 socket (PCIe 3.0), while the Ryzen 7 7840S uses FP7/FP7r2/FP8 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2666 on the Core i7-9700K versus DDR5-5600, LPDDR5x-7500 on the Ryzen 7 7840S — the Ryzen 7 7840S supports 110.1% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 7 7840S supports up to 256 GB of RAM compared to 128 GB — 100% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Core i7-9700K) vs 20 (Ryzen 7 7840S) — the Ryzen 7 7840S offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Intel 300 series (Core i7-9700K) and SoC (Ryzen 7 7840S).

Feature	Core i7-9700K	Ryzen 7 7840S
Socket	LGA1151	FP7/FP7r2/FP8
PCIe Generation	PCIe 3.0	PCIe 4.0+33%
Max RAM Speed	DDR4-2666	DDR5-5600, LPDDR5x-7500+110%
Max RAM Capacity	128 GB	256 GB+100%
RAM Channels	2	2
ECC Support	No	Yes
PCIe Lanes	16	20+25%

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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. Only the Ryzen 7 7840S supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: VT-x, VT-d (Core i7-9700K) vs AMD-V (SVM) (Ryzen 7 7840S). Both include integrated graphics — UHD Graphics 630 (Core i7-9700K) and Radeon 780M (Ryzen 7 7840S) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Core i7-9700K targets Desktop, Ryzen 7 7840S targets Gaming. Direct competitor: Ryzen 7 7840S rivals Core i7-1360P.