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 9 3900

2019

Why buy it

✅+10.6% higher Cinebench R23 multi-core.
✅+79% larger total L3 cache (64 MB vs 36 MB).
✅Draws 65W instead of 205W, a 140W reduction.
✅Includes a boxed cooler (Wraith Prism), unlike Xeon Gold 6246R.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon Gold 6246R across 4 shared CPU benchmark tests.
❌Less compelling for workstation-style loads than Xeon Gold 6246R, which brings 16 cores / 32 threads and 48 PCIe lanes.
❌Launch MSRP is still $499 MSRP, while Xeon Gold 6246R mostly shows up through inconsistent older-market listings.

Xeon Gold 6246R

2020

Why buy it

✅Better for gaming: +24.7% higher average FPS across 4 shared CPU benchmark tests.
✅Better for workstations and heavier parallel workloads: 16 cores / 32 threads, plus 48 PCIe lanes vs 24.
✅100% more PCIe lanes (48 vs 24) for storage and expansion-heavy builds.

Trade-offs

❌Lower Cinebench R23 multi-core (16,000 vs 17,700).
❌Smaller total L3 cache (36 MB vs 64 MB).
❌215.4% higher power demand at 205W vs 65W.
❌No boxed cooler included, unlike Ryzen 9 3900.

Ryzen 9 3900

2019

Xeon Gold 6246R

2020

Why buy it

✅+10.6% higher Cinebench R23 multi-core.
✅+79% larger total L3 cache (64 MB vs 36 MB).
✅Draws 65W instead of 205W, a 140W reduction.
✅Includes a boxed cooler (Wraith Prism), unlike Xeon Gold 6246R.

Why buy it

✅Better for gaming: +24.7% higher average FPS across 4 shared CPU benchmark tests.
✅Better for workstations and heavier parallel workloads: 16 cores / 32 threads, plus 48 PCIe lanes vs 24.
✅100% more PCIe lanes (48 vs 24) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon Gold 6246R across 4 shared CPU benchmark tests.
❌Less compelling for workstation-style loads than Xeon Gold 6246R, which brings 16 cores / 32 threads and 48 PCIe lanes.
❌Launch MSRP is still $499 MSRP, while Xeon Gold 6246R mostly shows up through inconsistent older-market listings.

Trade-offs

❌Lower Cinebench R23 multi-core (16,000 vs 17,700).
❌Smaller total L3 cache (36 MB vs 64 MB).
❌215.4% higher power demand at 205W vs 65W.
❌No boxed cooler included, unlike Ryzen 9 3900.

Quick Answers

So, is Ryzen 9 3900 better than Xeon Gold 6246R?

Not in a simple one-size-fits-all way. Xeon Gold 6246R makes more sense for workstation-style multi-core throughput, while Ryzen 9 3900 is the better mainstream desktop choice for gaming, platform cost, and day-to-day practicality.

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 10.6% better Cinebench R23 multi-core, backed by 12 cores and 24 threads. It also carries the larger cache pool with 79% larger total L3 cache (64 MB vs 36 MB).

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

Ryzen 9 3900 is the smarter buy today. Ryzen 9 3900 is at an unclear MSRP at $499 MSRP versus unclear MSRP, and it gives you 10.6% better Cinebench R23 multi-core. The trade-off is that Xeon Gold 6246R is still the better pure gaming CPU with a 24.7% average FPS lead across 4 shared CPU game tests in our data. It is also 100.0% better value on MSRP (61.3 vs 0.0 PassMark/$), 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?

Xeon Gold 6246R is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2020 vs 2019) and AVX-512 support for heavier modern compute workloads. 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 9 3900 Benchmark Check

Xeon Gold 6246R Benchmark Check

Path of Exile 2

Preset	Ryzen 9 3900	Xeon Gold 6246R
1080p
low	159 FPS	198 FPS
medium	130 FPS	156 FPS
high	111 FPS	126 FPS
ultra	92 FPS	98 FPS
1440p
low	144 FPS	162 FPS
medium	115 FPS	124 FPS
high	94 FPS	96 FPS
ultra	78 FPS	76 FPS
4K
low	78 FPS	74 FPS
medium	67 FPS	60 FPS
high	53 FPS	47 FPS
ultra	43 FPS	38 FPS

Open Ryzen 9 3900 Open Xeon Gold 6246R

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Ryzen 9 3900	Xeon Gold 6246R
1080p
low	534 FPS	505 FPS
medium	470 FPS	442 FPS
high	384 FPS	366 FPS
ultra	342 FPS	326 FPS
1440p
low	460 FPS	446 FPS
medium	411 FPS	391 FPS
high	347 FPS	328 FPS
ultra	289 FPS	275 FPS
4K
low	288 FPS	282 FPS
medium	261 FPS	248 FPS
high	238 FPS	226 FPS
ultra	213 FPS	201 FPS

Open Ryzen 9 3900 Open Xeon Gold 6246R

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Ryzen 9 3900	Xeon Gold 6246R
1080p
low	709 FPS	762 FPS
medium	589 FPS	762 FPS
high	536 FPS	762 FPS
ultra	472 FPS	762 FPS
1440p
low	541 FPS	762 FPS
medium	448 FPS	720 FPS
high	401 FPS	665 FPS
ultra	347 FPS	596 FPS
4K
low	394 FPS	516 FPS
medium	315 FPS	423 FPS
high	279 FPS	372 FPS
ultra	224 FPS	306 FPS

Open Ryzen 9 3900 Open Xeon Gold 6246R

League of Legends

League of Legends

Valorant

Preset	Ryzen 9 3900	Xeon Gold 6246R
1080p
low	765 FPS	762 FPS
medium	765 FPS	762 FPS
high	711 FPS	762 FPS
ultra	638 FPS	739 FPS
1440p
low	725 FPS	762 FPS
medium	644 FPS	762 FPS
high	553 FPS	673 FPS
ultra	486 FPS	568 FPS
4K
low	516 FPS	677 FPS
medium	469 FPS	592 FPS
high	411 FPS	511 FPS
ultra	360 FPS	428 FPS

Open Ryzen 9 3900 Open Xeon Gold 6246R

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Ryzen 9 3900 and Xeon Gold 6246R

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.

Xeon Gold 6246R

The Xeon Gold 6246R is manufactured by Intel. It was released in 24 February 2020 (5 years ago). It is based on the Cascade Lake (2019−2020) architecture. It features 16 cores and 32 threads. Base frequency is 3.4 GHz, with boost up to 4.1 GHz. L3 cache: 35.75 MB. L2 cache: 16 MB. Built on 14 nm process technology. Socket: LGA3647. Thermal design power (TDP): 205 Watt. Memory support: DDR4-2933. Passmark benchmark score: 30,468 points. Launch price was $3,286.

⚡

Processing Power

The Ryzen 9 3900 packs 12 cores / 24 threads, while the Xeon Gold 6246R offers 16 cores / 32 threads — the Xeon Gold 6246R has 4 more cores. Boost clocks reach 4.3 GHz on the Ryzen 9 3900 versus 4.1 GHz on the Xeon Gold 6246R — a 4.8% clock advantage for the Ryzen 9 3900 (base: 3.1 GHz vs 3.4 GHz). The Ryzen 9 3900 uses the Matisse (Zen 2) (2019−2020) architecture (7 nm, 12 nm), while the Xeon Gold 6246R uses Cascade Lake (2019−2020) (14 nm). In PassMark, the Ryzen 9 3900 scores 30,588 against the Xeon Gold 6246R's 30,468 — a 0.4% lead for the Ryzen 9 3900. Cinebench R23 multi-core: 17,700 vs 16,000 (10.1% advantage for the Ryzen 9 3900). Geekbench 6 single-core — the metric most relevant to gaming — records 1,713 vs 1,293, a 27.9% lead for the Ryzen 9 3900 that directly translates to higher frame rates. Multi-core Geekbench: 10,983 vs 9,848 (10.9% advantage for the Ryzen 9 3900). L3 cache: 64 MB on the Ryzen 9 3900 vs 35.75 MB on the Xeon Gold 6246R.

Feature	Ryzen 9 3900	Xeon Gold 6246R
Cores / Threads	12 / 24	16 / 32+33%
Boost Clock	4.3 GHz+5%	4.1 GHz
Base Clock	3.1 GHz	3.4 GHz+10%
L3 Cache	64 MB+79%	35.75 MB
L2 Cache	512 kB (per core)	16 MB+3100%
Process	7 nm, 12 nm-50%	14 nm
Architecture	Matisse (Zen 2) (2019−2020)	Cascade Lake (2019−2020)
PassMark	30,588	30,468
Cinebench R23 Multi	17,700+11%	16,000
Geekbench 6 Single	1,713+32%	1,293
Geekbench 6 Multi	10,983+12%	9,848

🧠

Memory & Platform

The Ryzen 9 3900 uses the AM4 socket (PCIe 4.0), while the Xeon Gold 6246R uses LGA3647 (PCIe 3.0) — making them incompatible on the same motherboard. Both support up to DDR4-3200 memory speed. The Xeon Gold 6246R supports up to 1024 GB of RAM compared to 128 GB — 155.6% more capacity for professional workloads. Memory channels: 2 (Ryzen 9 3900) vs 6 (Xeon Gold 6246R). PCIe lanes: 24 (Ryzen 9 3900) vs 48 (Xeon Gold 6246R) — the Xeon Gold 6246R offers 24 more lanes for additional GPUs or NVMe drives. Chipset compatibility: X570,B550,X470,B450 (Ryzen 9 3900) and Lewisburg (Xeon Gold 6246R).

Feature	Ryzen 9 3900	Xeon Gold 6246R
Socket	AM4	LGA3647
PCIe Generation	PCIe 4.0+33%	PCIe 3.0
Max RAM Speed	DDR4-3200	DDR4-2933
Max RAM Capacity	128 GB	1024 GB+700%
RAM Channels	2	6+200%
ECC Support	No	Yes
PCIe Lanes	24	48+100%

🔧

Advanced Features

Only the Ryzen 9 3900 has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the Xeon Gold 6246R supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: AMD-V (Ryzen 9 3900) vs VT-x, VT-d, EPT (Xeon Gold 6246R). Primary use case: Ryzen 9 3900 targets Workstation Desktop (low power), Xeon Gold 6246R targets High-frequency Server / Financial. Direct competitor: Ryzen 9 3900 rivals Core i9-9900; Xeon Gold 6246R rivals EPYC 7302.

Feature	Ryzen 9 3900	Xeon Gold 6246R
Integrated GPU	No	No
Unlocked	Yes	No
AVX-512	No	Yes
Virtualization	AMD-V	VT-x, VT-d, EPT
Target Use	Workstation Desktop (low power)	High-frequency Server / Financial