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

✅Better for gaming: +10.7% higher average FPS across 39 shared CPU benchmark tests.
✅Costs $50 less on MSRP ($449 MSRP vs $499 MSRP).

Trade-offs

❌Lower PassMark (27,712 vs 30,588).
❌Smaller total L3 cache (32 MB vs 64 MB).
❌61.5% higher power demand at 105W vs 65W.
❌No boxed cooler included, unlike Ryzen 9 3900.

Ryzen 9 3900

2019

Why buy it

✅+10.4% higher PassMark.
✅+100% larger total L3 cache (64 MB vs 32 MB).
✅Draws 65W instead of 105W, a 40W reduction.
✅Includes a boxed cooler (Wraith Prism), unlike Ryzen 7 5800X.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 7 5800X across 39 shared CPU benchmark tests.
❌
11.1% HIGHER MSRP
$499 MSRPvs$449 MSRP

Ryzen 7 5800X

2020

Ryzen 9 3900

2019

Why buy it

✅Better for gaming: +10.7% higher average FPS across 39 shared CPU benchmark tests.
✅Costs $50 less on MSRP ($449 MSRP vs $499 MSRP).

Why buy it

✅+10.4% higher PassMark.
✅+100% larger total L3 cache (64 MB vs 32 MB).
✅Draws 65W instead of 105W, a 40W reduction.
✅Includes a boxed cooler (Wraith Prism), unlike Ryzen 7 5800X.

Trade-offs

❌Lower PassMark (27,712 vs 30,588).
❌Smaller total L3 cache (32 MB vs 64 MB).
❌61.5% higher power demand at 105W vs 65W.
❌No boxed cooler included, unlike Ryzen 9 3900.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 7 5800X across 39 shared CPU benchmark tests.
❌
11.1% HIGHER MSRP
$499 MSRPvs$449 MSRP

Quick Answers

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

It depends on what matters more to you. For gaming, Ryzen 7 5800X is ahead with a 10.7% average FPS lead across 39 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Ryzen 9 3900 pulls ahead with 10.4% better PassMark. Ryzen 9 3900 also has the bigger cache pool with 100% larger total L3 cache (64 MB vs 32 MB).

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

For streaming, content creation, and heavier multitasking, Ryzen 9 3900 is the better fit. You are getting 10.4% 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 7 5800X is the smarter buy today. Ryzen 7 5800X is $50 cheaper on MSRP at $449 MSRP versus $499 MSRP, and it gives you a 10.7% average FPS lead across 39 shared CPU game tests in our data. The trade-off is that Ryzen 9 3900 is still stronger for heavier multi-core work with 10.4% better PassMark. It is also 0.7% better value on MSRP (61.7 vs 61.3 PassMark/$), 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 3900 Benchmark Check

Path of Exile 2

Preset	Ryzen 7 5800X	Ryzen 9 3900
1080p
low	206 FPS	159 FPS
medium	178 FPS	130 FPS
high	146 FPS	111 FPS
ultra	110 FPS	92 FPS
1440p
low	170 FPS	144 FPS
medium	142 FPS	115 FPS
high	115 FPS	94 FPS
ultra	88 FPS	78 FPS
4K
low	83 FPS	78 FPS
medium	74 FPS	67 FPS
high	59 FPS	53 FPS
ultra	46 FPS	43 FPS

Open Ryzen 7 5800X Open Ryzen 9 3900

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Ryzen 7 5800X	Ryzen 9 3900
1080p
low	662 FPS	534 FPS
medium	558 FPS	470 FPS
high	466 FPS	384 FPS
ultra	417 FPS	342 FPS
1440p
low	563 FPS	460 FPS
medium	493 FPS	411 FPS
high	423 FPS	347 FPS
ultra	361 FPS	289 FPS
4K
low	350 FPS	288 FPS
medium	308 FPS	261 FPS
high	288 FPS	238 FPS
ultra	250 FPS	213 FPS

Open Ryzen 7 5800X Open Ryzen 9 3900

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Ryzen 7 5800X	Ryzen 9 3900
1080p
low	693 FPS	709 FPS
medium	651 FPS	589 FPS
high	570 FPS	536 FPS
ultra	464 FPS	472 FPS
1440p
low	693 FPS	541 FPS
medium	573 FPS	448 FPS
high	498 FPS	401 FPS
ultra	413 FPS	347 FPS
4K
low	484 FPS	394 FPS
medium	410 FPS	315 FPS
high	363 FPS	279 FPS
ultra	302 FPS	224 FPS

Open Ryzen 7 5800X Open Ryzen 9 3900

League of Legends

League of Legends

Valorant

Preset	Ryzen 7 5800X	Ryzen 9 3900
1080p
low	693 FPS	765 FPS
medium	693 FPS	765 FPS
high	693 FPS	711 FPS
ultra	693 FPS	638 FPS
1440p
low	693 FPS	725 FPS
medium	693 FPS	644 FPS
high	672 FPS	553 FPS
ultra	593 FPS	486 FPS
4K
low	604 FPS	516 FPS
medium	550 FPS	469 FPS
high	495 FPS	411 FPS
ultra	436 FPS	360 FPS

Open Ryzen 7 5800X Open Ryzen 9 3900

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

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

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 3900

The Ryzen 9 3900 is manufactured by AMD. It was released in 24 September 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 3.1 GHz, with boost up to 4.3 GHz. L3 cache: 64 MB. L2 cache: 512 kB (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 65 Watt. Memory support: DDR4-3200. Passmark benchmark score: 30,588 points. Launch price was $499.

⚡

Processing Power

The Ryzen 7 5800X packs 8 cores / 16 threads, while the Ryzen 9 3900 offers 12 cores / 24 threads — the Ryzen 9 3900 has 4 more cores. Boost clocks reach 4.7 GHz on the Ryzen 7 5800X versus 4.3 GHz on the Ryzen 9 3900 — a 8.9% clock advantage for the Ryzen 7 5800X (base: 3.8 GHz vs 3.1 GHz). The Ryzen 7 5800X uses the Vermeer (Zen 3) (2020−2022) architecture (7 nm, 12 nm), while the Ryzen 9 3900 uses Matisse (Zen 2) (2019−2020) (7 nm, 12 nm). In PassMark, the Ryzen 7 5800X scores 27,712 against the Ryzen 9 3900's 30,588 — a 9.9% lead for the Ryzen 9 3900. L3 cache: 32 MB on the Ryzen 7 5800X vs 64 MB on the Ryzen 9 3900.

Feature	Ryzen 7 5800X	Ryzen 9 3900
Cores / Threads	8 / 16	12 / 24+50%
Boost Clock	4.7 GHz+9%	4.3 GHz
Base Clock	3.8 GHz+23%	3.1 GHz
L3 Cache	32 MB	64 MB+100%
L2 Cache	512K (per core)	512 kB (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	30,588+10%
Cinebench R23 Multi	—	17,700
Geekbench 6 Single	—	1,713
Geekbench 6 Multi	—	10,983

🧠

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,X470,B450 (Ryzen 9 3900).

Feature	Ryzen 7 5800X	Ryzen 9 3900
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	No
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 3900 targets Workstation Desktop (low power). Direct competitor: Ryzen 9 3900 rivals Core i9-9900.

Feature	Ryzen 7 5800X	Ryzen 9 3900
Integrated GPU	No	No
Unlocked	Yes	Yes
AVX-512	No	No
Virtualization	AMD-V	AMD-V
Target Use	Desktop	Workstation Desktop (low power)

💰

Value Analysis

The Ryzen 7 5800X launched at $449 MSRP, while the Ryzen 9 3900 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 61.3 pts/$ for the Ryzen 9 3900 — making the Ryzen 7 5800X the 0.7% better value option.