Ryzen 7 3700X vs Ryzen 7 7840U

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.

Head-to-Head Verdict, Benchmarks, Value & Long-Term Outlook

This comparison brings together gaming FPS, productivity performance, platform differences, power efficiency, pricing context, and upgrade path so you can see which CPU actually makes more sense.

Ryzen 7 3700X

2019

Why buy it

✅+100% larger total L3 cache (32 MB vs 16 MB).
✅Costs $71 less on MSRP ($329 MSRP vs $400 MSRP).
✅Delivers 11.1% more PassMark for each dollar spent, at 68.2 vs 61.4 PassMark/$ ($329 MSRP vs $400 MSRP).
✅100+% more PCIe lanes (24 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 7 7840U across 4 shared CPU benchmark tests.
❌Lower PassMark (22,430 vs 24,547).
❌132.1% higher power demand at 65W vs 28W.
❌Older platform position on AM4 with DDR4, while Ryzen 7 7840U moves to FP8 and DDR5.

Ryzen 7 7840U

2023

Why buy it

✅Better for gaming: +4.5% higher average FPS across 4 shared CPU benchmark tests.
✅Draws 28W instead of 65W, a 37W reduction.
✅Newer platform on FP8 with DDR5 support instead of AM4 and DDR4.

Trade-offs

❌Smaller total L3 cache (16 MB vs 32 MB).
❌Lower PassMark per dollar, at 61.4 vs 68.2 PassMark/$ ($400 MSRP vs $329 MSRP).

Ryzen 7 3700X

2019

Ryzen 7 7840U

2023

Why buy it

✅+100% larger total L3 cache (32 MB vs 16 MB).
✅Costs $71 less on MSRP ($329 MSRP vs $400 MSRP).
✅Delivers 11.1% more PassMark for each dollar spent, at 68.2 vs 61.4 PassMark/$ ($329 MSRP vs $400 MSRP).
✅100+% more PCIe lanes (24 vs 0) for storage and expansion-heavy builds.

Why buy it

✅Better for gaming: +4.5% higher average FPS across 4 shared CPU benchmark tests.
✅Draws 28W instead of 65W, a 37W reduction.
✅Newer platform on FP8 with DDR5 support instead of AM4 and DDR4.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 7 7840U across 4 shared CPU benchmark tests.
❌Lower PassMark (22,430 vs 24,547).
❌132.1% higher power demand at 65W vs 28W.
❌Older platform position on AM4 with DDR4, while Ryzen 7 7840U moves to FP8 and DDR5.

Trade-offs

❌Smaller total L3 cache (16 MB vs 32 MB).
❌Lower PassMark per dollar, at 61.4 vs 68.2 PassMark/$ ($400 MSRP vs $329 MSRP).

Quick Answers

So, is Ryzen 7 7840U better than Ryzen 7 3700X?

Yes. Ryzen 7 7840U is the better overall CPU here. You are getting a 4.5% average FPS lead across 4 shared CPU game tests in our data, 9.4% better PassMark, and the stronger long-term platform, which makes it the stronger all-around choice.

Which one is better for gaming?

If gaming is the priority, Ryzen 7 7840U is the better pick here. According to our tests, it delivers 4.5% more average FPS across 4 shared CPU game tests.

Which one is better for streaming, content creation, and heavy multitasking?

For streaming, content creation, and heavier multitasking, Ryzen 7 7840U is the better fit. You are getting 9.4% better PassMark, backed by 8 cores and 16 threads.

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

Ryzen 7 7840U is still the faster CPU overall, but Ryzen 7 3700X makes more sense if price matters more than absolute performance. Ryzen 7 7840U is 21.6% more expensive on MSRP at $400 MSRP versus $329 MSRP, and it gives you a 4.5% average FPS lead across 4 shared CPU game tests in our data. Ryzen 7 3700X is also 11.1% better value on MSRP (68.2 vs 61.4 PassMark/$), which is why it is easier to justify for price-conscious builds on paper.

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

Ryzen 7 7840U is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2019), a healthier platform with FP8 and DDR5 instead of AM4, and more multi-core headroom with 8 cores / 16 threads instead of 8/16. That should give you a better long-term upgrade path for motherboard, RAM, and future CPU swaps.

Games Benchmarks

Paired with RTX 4090

To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.

Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.

Ryzen 7 3700X Benchmark Check

Ryzen 7 7840U Benchmark Check

Path of Exile 2

Preset	Ryzen 7 3700X	Ryzen 7 7840U
1080p
low	200 FPS	257 FPS
medium	163 FPS	237 FPS
high	137 FPS	200 FPS
ultra	110 FPS	173 FPS
1440p
low	156 FPS	228 FPS
medium	121 FPS	191 FPS
high	100 FPS	155 FPS
ultra	80 FPS	138 FPS
4K
low	84 FPS	159 FPS
medium	71 FPS	134 FPS
high	56 FPS	104 FPS
ultra	44 FPS	92 FPS

Open Ryzen 7 3700X Open Ryzen 7 7840U

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Ryzen 7 3700X	Ryzen 7 7840U
1080p
low	561 FPS	477 FPS
medium	525 FPS	395 FPS
high	428 FPS	342 FPS
ultra	383 FPS	306 FPS
1440p
low	545 FPS	417 FPS
medium	471 FPS	364 FPS
high	394 FPS	315 FPS
ultra	337 FPS	270 FPS
4K
low	350 FPS	275 FPS
medium	304 FPS	251 FPS
high	274 FPS	238 FPS
ultra	242 FPS	206 FPS

Open Ryzen 7 3700X Open Ryzen 7 7840U

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Ryzen 7 3700X	Ryzen 7 7840U
1080p
low	561 FPS	614 FPS
medium	561 FPS	614 FPS
high	561 FPS	614 FPS
ultra	561 FPS	595 FPS
1440p
low	561 FPS	614 FPS
medium	561 FPS	614 FPS
high	538 FPS	526 FPS
ultra	470 FPS	452 FPS
4K
low	499 FPS	525 FPS
medium	394 FPS	459 FPS
high	343 FPS	407 FPS
ultra	275 FPS	345 FPS

Open Ryzen 7 3700X Open Ryzen 7 7840U

League of Legends

League of Legends

Valorant

Preset	Ryzen 7 3700X	Ryzen 7 7840U
1080p
low	561 FPS	614 FPS
medium	561 FPS	614 FPS
high	561 FPS	614 FPS
ultra	561 FPS	614 FPS
1440p
low	561 FPS	614 FPS
medium	561 FPS	614 FPS
high	561 FPS	614 FPS
ultra	555 FPS	549 FPS
4K
low	561 FPS	560 FPS
medium	501 FPS	502 FPS
high	447 FPS	447 FPS
ultra	396 FPS	384 FPS

Open Ryzen 7 3700X Open Ryzen 7 7840U

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Ryzen 7 3700X and Ryzen 7 7840U

Ryzen 7 3700X

The Ryzen 7 3700X is manufactured by AMD. It was released in 7 July 2019 (6 years ago). It is based on the Matisse (Zen 2) (2019−2020) architecture. It features 8 cores and 16 threads. Base frequency is 3.6 GHz, with boost up to 4.4 GHz. L3 cache: 32 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 65 Watt. Memory support: DDR4 Dual-channel. Passmark benchmark score: 22,430 points. Launch price was $329.

Ryzen 7 7840U

The Ryzen 7 7840U is manufactured by AMD. It was released in Maio 2023 (2 years ago). It is based on the Phoenix-U (Zen 4) (2023) architecture. It features 8 cores and 16 threads. Base frequency is 3.3 GHz, with boost up to 5.1 GHz. L3 cache: 16 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: FP8. Thermal design power (TDP): 28 Watt. Memory support: DDR5-5600. Passmark benchmark score: 24,547 points. Launch price was $299.

⚡

Processing Power

Both the Ryzen 7 3700X and Ryzen 7 7840U share an identical 8-core/16-thread configuration. Boost clocks reach 4.4 GHz on the Ryzen 7 3700X versus 5.1 GHz on the Ryzen 7 7840U — a 14.7% clock advantage for the Ryzen 7 7840U (base: 3.6 GHz vs 3.3 GHz). The Ryzen 7 3700X uses the Matisse (Zen 2) (2019−2020) architecture (7 nm, 12 nm), while the Ryzen 7 7840U uses Phoenix-U (Zen 4) (2023) (4 nm). In PassMark, the Ryzen 7 3700X scores 22,430 against the Ryzen 7 7840U's 24,547 — a 9% lead for the Ryzen 7 7840U. L3 cache: 32 MB on the Ryzen 7 3700X vs 16 MB (total) on the Ryzen 7 7840U.

Feature	Ryzen 7 3700X	Ryzen 7 7840U
Cores / Threads	8 / 16	8 / 16
Boost Clock	4.4 GHz	5.1 GHz+16%
Base Clock	3.6 GHz+9%	3.3 GHz
L3 Cache	32 MB+100%	16 MB (total)
L2 Cache	512K (per core)	1 MB (per core)+100%
Process	7 nm, 12 nm	4 nm-43%
Architecture	Matisse (Zen 2) (2019−2020)	Phoenix-U (Zen 4) (2023)
PassMark	22,430	24,547+9%

🧠

Memory & Platform

The Ryzen 7 3700X uses the AM4 socket (PCIe 4.0), while the Ryzen 7 7840U uses FP8 (PCIe 4.0) — making them incompatible on the same motherboard.

Feature	Ryzen 7 3700X	Ryzen 7 7840U
Socket	AM4	FP8
PCIe Generation	PCIe 4.0	PCIe 4.0
Max RAM Speed	DDR4-3200	—
Max RAM Capacity	128 GB	—
RAM Channels	2	—
ECC Support	Yes	—
PCIe Lanes	24	—

💰

Value Analysis

The Ryzen 7 3700X launched at $329 MSRP, while the Ryzen 7 7840U debuted at $400. On MSRP ($329 vs $400), the Ryzen 7 3700X is $71 cheaper. In terms of value on MSRP (PassMark points per dollar), the Ryzen 7 3700X delivers 68.2 pts/$ vs 61.4 pts/$ for the Ryzen 7 7840U — making the Ryzen 7 3700X the 10.5% better value option.