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 5800X

2020

Why buy it

✅Costs $50 less on MSRP ($449 MSRP vs $499 MSRP).

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 3900X across 50 shared CPU benchmark tests.
❌Lower PassMark (27,712 vs 32,517).
❌Smaller total L3 cache (32 MB vs 64 MB).
❌No boxed cooler included, unlike Ryzen 9 3900X.

Ryzen 9 3900X

2019

Why buy it

✅Better for gaming: +21.9% higher average FPS across 50 shared CPU benchmark tests.
✅+100% larger total L3 cache (64 MB vs 32 MB).
✅Includes a boxed cooler (Wraith Prism), unlike Ryzen 7 5800X.

Trade-offs

❌
11.1% HIGHER MSRP
$499 MSRPvs$449 MSRP

Ryzen 7 5800X

2020

Ryzen 9 3900X

2019

Why buy it

✅Costs $50 less on MSRP ($449 MSRP vs $499 MSRP).

Why buy it

✅Better for gaming: +21.9% higher average FPS across 50 shared CPU benchmark tests.
✅+100% larger total L3 cache (64 MB vs 32 MB).
✅Includes a boxed cooler (Wraith Prism), unlike Ryzen 7 5800X.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 3900X across 50 shared CPU benchmark tests.
❌Lower PassMark (27,712 vs 32,517).
❌Smaller total L3 cache (32 MB vs 64 MB).
❌No boxed cooler included, unlike Ryzen 9 3900X.

Trade-offs

❌
11.1% HIGHER MSRP
$499 MSRPvs$449 MSRP

Quick Answers

So, is Ryzen 9 3900X better than Ryzen 7 5800X?

Yes. Ryzen 9 3900X is the better overall CPU here. You are getting a 21.9% average FPS lead across 50 shared CPU game tests in our data and 17.3% better PassMark, which makes it the stronger all-around choice.

Which one is better for gaming?

If gaming is the priority, Ryzen 9 3900X is the better pick here. According to our tests, it delivers 21.9% 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 9 3900X is the better fit. You are getting 17.3% better PassMark, backed by 12 cores and 24 threads. It also carries the larger cache pool with 100% larger total L3 cache (64 MB vs 32 MB).

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

Ryzen 9 3900X is the smarter buy today. Ryzen 9 3900X is 11.1% more expensive on MSRP at $499 MSRP versus $449 MSRP, and it gives you a 21.9% average FPS lead across 50 shared CPU game tests in our data. It is also 5.6% better value on MSRP (65.2 vs 61.7 PassMark/$), so the better CPU is not just faster, it is also the cleaner value play on paper.

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

Ryzen 7 5800X is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2020 vs 2019). That makes it the safer long-term pick.

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 5800X Benchmark Check

Ryzen 9 3900X Benchmark Check

Path of Exile 2

Preset	Ryzen 7 5800X	Ryzen 9 3900X
1080p
low	206 FPS	209 FPS
medium	178 FPS	170 FPS
high	146 FPS	140 FPS
ultra	110 FPS	114 FPS
1440p
low	170 FPS	171 FPS
medium	142 FPS	131 FPS
high	115 FPS	104 FPS
ultra	88 FPS	86 FPS
4K
low	83 FPS	92 FPS
medium	74 FPS	77 FPS
high	59 FPS	61 FPS
ultra	46 FPS	49 FPS

Open Ryzen 7 5800X Open Ryzen 9 3900X

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Ryzen 7 5800X	Ryzen 9 3900X
1080p
low	662 FPS	781 FPS
medium	558 FPS	654 FPS
high	466 FPS	510 FPS
ultra	417 FPS	447 FPS
1440p
low	563 FPS	648 FPS
medium	493 FPS	552 FPS
high	423 FPS	452 FPS
ultra	361 FPS	369 FPS
4K
low	350 FPS	380 FPS
medium	308 FPS	326 FPS
high	288 FPS	293 FPS
ultra	250 FPS	258 FPS

Open Ryzen 7 5800X Open Ryzen 9 3900X

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Ryzen 7 5800X	Ryzen 9 3900X
1080p
low	693 FPS	813 FPS
medium	651 FPS	794 FPS
high	570 FPS	730 FPS
ultra	464 FPS	647 FPS
1440p
low	693 FPS	707 FPS
medium	573 FPS	583 FPS
high	498 FPS	522 FPS
ultra	413 FPS	459 FPS
4K
low	484 FPS	503 FPS
medium	410 FPS	403 FPS
high	363 FPS	361 FPS
ultra	302 FPS	292 FPS

Open Ryzen 7 5800X Open Ryzen 9 3900X

League of Legends

League of Legends

Valorant

Preset	Ryzen 7 5800X	Ryzen 9 3900X
1080p
low	693 FPS	813 FPS
medium	693 FPS	813 FPS
high	693 FPS	813 FPS
ultra	693 FPS	813 FPS
1440p
low	693 FPS	813 FPS
medium	693 FPS	813 FPS
high	672 FPS	714 FPS
ultra	593 FPS	619 FPS
4K
low	604 FPS	669 FPS
medium	550 FPS	594 FPS
high	495 FPS	525 FPS
ultra	436 FPS	437 FPS

Open Ryzen 7 5800X Open Ryzen 9 3900X

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Ryzen 7 5800X and Ryzen 9 3900X

Ryzen 7 5800X

The Ryzen 7 5800X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen 3) (2020−2022) architecture. It features 8 cores and 16 threads. Base frequency is 3.8 GHz, with boost up to 4.7 GHz. L3 cache: 32 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4. Passmark benchmark score: 27,712 points. Launch price was $449.

Ryzen 9 3900X

The Ryzen 9 3900X 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 12 cores and 24 threads. Base frequency is 3.8 GHz, with boost up to 4.6 GHz. L3 cache: 64 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 125 Watt. Memory support: DDR4 Dual-channel. Passmark benchmark score: 32,517 points. Launch price was $499.

⚡

Processing Power

The Ryzen 7 5800X packs 8 cores / 16 threads, while the Ryzen 9 3900X offers 12 cores / 24 threads — the Ryzen 9 3900X has 4 more cores. Boost clocks reach 4.7 GHz on the Ryzen 7 5800X versus 4.6 GHz on the Ryzen 9 3900X — a 2.2% clock advantage for the Ryzen 7 5800X (base: 3.8 GHz vs 3.8 GHz). The Ryzen 7 5800X uses the Vermeer (Zen 3) (2020−2022) architecture (7 nm, 12 nm), while the Ryzen 9 3900X uses Matisse (Zen 2) (2019−2020) (7 nm, 12 nm). In PassMark, the Ryzen 7 5800X scores 27,712 against the Ryzen 9 3900X's 32,517 — a 16% lead for the Ryzen 9 3900X. L3 cache: 32 MB on the Ryzen 7 5800X vs 64 MB on the Ryzen 9 3900X.

Feature	Ryzen 7 5800X	Ryzen 9 3900X
Cores / Threads	8 / 16	12 / 24+50%
Boost Clock	4.7 GHz+2%	4.6 GHz
Base Clock	3.8 GHz	3.8 GHz
L3 Cache	32 MB	64 MB+100%
L2 Cache	512K (per core)	512K (per core)
Process	7 nm, 12 nm	7 nm, 12 nm
Architecture	Vermeer (Zen 3) (2020−2022)	Matisse (Zen 2) (2019−2020)
PassMark	27,712	32,517+17%
Geekbench 6 Single	—	1,300
Geekbench 6 Multi	—	12,000

🧠

Memory & Platform

Both processors use the AM4 socket with PCIe 4.0. Both support up to DDR4-3200 memory speed. Both support up to 128 GB of RAM. Both feature 2-channel memory with ECC support. Both provide 24 PCIe lanes. Chipset compatibility: AMD 500 series,AMD 400 series,AMD 300 series (Ryzen 7 5800X) and X570,B550 (Ryzen 9 3900X).

Feature	Ryzen 7 5800X	Ryzen 9 3900X
Socket	AM4	AM4
PCIe Generation	PCIe 4.0	PCIe 4.0
Max RAM Speed	DDR4-3200	DDR4-3200
Max RAM Capacity	128 GB	128 GB
RAM Channels	2	2
ECC Support	Yes	Yes
PCIe Lanes	24	24

🔧

Advanced Features

Both processors feature an unlocked multiplier for overclocking. Both support AMD-V virtualization. Primary use case: Ryzen 7 5800X targets Desktop, Ryzen 9 3900X targets Workstation.

Feature	Ryzen 7 5800X	Ryzen 9 3900X
Integrated GPU	No	No
IGPU Model	—	None
Unlocked	Yes	Yes
AVX-512	No	No
Virtualization	AMD-V	AMD-V
Target Use	Desktop	Workstation

💰

Value Analysis

The Ryzen 7 5800X launched at $449 MSRP, while the Ryzen 9 3900X debuted at $499. On MSRP ($449 vs $499), the Ryzen 7 5800X is $50 cheaper. In terms of value on MSRP (PassMark points per dollar), the Ryzen 7 5800X delivers 61.7 pts/$ vs 65.2 pts/$ for the Ryzen 9 3900X — making the Ryzen 9 3900X the 5.4% better value option.