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 3900X

2019

Why buy it

✅Better for gaming: +40.9% higher average FPS across 50 shared CPU benchmark tests.
✅+93.9% larger total L3 cache (64 MB vs 33 MB).
✅Draws 105W instead of 205W, a 100W reduction.
✅Includes a boxed cooler (Wraith Prism), unlike Xeon Platinum 8168.

Trade-offs

❌Less compelling for workstation-style loads than Xeon Platinum 8168, which brings 24 cores / 48 threads and 48 PCIe lanes.
❌Launch MSRP is still $499 MSRP, while Xeon Platinum 8168 mostly shows up through inconsistent older-market listings.
❌No AVX-512 support for niche heavy compute workloads where it can matter.

Xeon Platinum 8168

2017

Why buy it

✅Better for workstations and heavier parallel workloads: 24 cores / 48 threads, plus 48 PCIe lanes vs 24.
✅100% more PCIe lanes (48 vs 24) for storage and expansion-heavy builds.
✅AVX-512 support for select workstation, AI, and scientific workloads.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 3900X across 50 shared CPU benchmark tests.
❌Lower PassMark (32,373 vs 32,517).
❌Smaller total L3 cache (33 MB vs 64 MB).
❌95.2% higher power demand at 205W vs 105W.
❌No boxed cooler included, unlike Ryzen 9 3900X.

Ryzen 9 3900X

2019

Xeon Platinum 8168

2017

Why buy it

✅Better for gaming: +40.9% higher average FPS across 50 shared CPU benchmark tests.
✅+93.9% larger total L3 cache (64 MB vs 33 MB).
✅Draws 105W instead of 205W, a 100W reduction.
✅Includes a boxed cooler (Wraith Prism), unlike Xeon Platinum 8168.

Why buy it

✅Better for workstations and heavier parallel workloads: 24 cores / 48 threads, plus 48 PCIe lanes vs 24.
✅100% more PCIe lanes (48 vs 24) for storage and expansion-heavy builds.
✅AVX-512 support for select workstation, AI, and scientific workloads.

Trade-offs

❌Less compelling for workstation-style loads than Xeon Platinum 8168, which brings 24 cores / 48 threads and 48 PCIe lanes.
❌Launch MSRP is still $499 MSRP, while Xeon Platinum 8168 mostly shows up through inconsistent older-market listings.
❌No AVX-512 support for niche heavy compute workloads where it can matter.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 3900X across 50 shared CPU benchmark tests.
❌Lower PassMark (32,373 vs 32,517).
❌Smaller total L3 cache (33 MB vs 64 MB).
❌95.2% higher power demand at 205W vs 105W.
❌No boxed cooler included, unlike Ryzen 9 3900X.

Quick Answers

So, is Ryzen 9 3900X better than Xeon Platinum 8168?

Not in a simple one-size-fits-all way. Xeon Platinum 8168 makes more sense for workstation-style multi-core throughput, while Ryzen 9 3900X is the better mainstream desktop choice for gaming, platform cost, and day-to-day practicality.

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 40.9% 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 0.4% better PassMark, backed by 12 cores and 24 threads. It also carries the larger cache pool with 93.9% larger total L3 cache (64 MB vs 33 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 at an unclear MSRP at $499 MSRP versus unclear MSRP, and it gives you a 40.9% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (65.2 vs 0.0 PassMark/$), 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?

Ryzen 9 3900X is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2019 vs 2017), 93.9% larger total L3 cache (64 MB vs 33 MB), and more multi-core headroom with 12 cores / 24 threads instead of 24/48. That extra compute headroom should age better as games, background tasks, and creator workloads get heavier.

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 3900X Benchmark Check

Xeon Platinum 8168 Benchmark Check

Path of Exile 2

Preset	Ryzen 9 3900X	Xeon Platinum 8168
1080p
low	209 FPS	195 FPS
medium	170 FPS	158 FPS
high	140 FPS	128 FPS
ultra	114 FPS	100 FPS
1440p
low	171 FPS	157 FPS
medium	131 FPS	123 FPS
high	104 FPS	96 FPS
ultra	86 FPS	76 FPS
4K
low	92 FPS	72 FPS
medium	77 FPS	60 FPS
high	61 FPS	47 FPS
ultra	49 FPS	38 FPS

Open Ryzen 9 3900X Open Xeon Platinum 8168

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Ryzen 9 3900X	Xeon Platinum 8168
1080p
low	781 FPS	403 FPS
medium	654 FPS	350 FPS
high	510 FPS	292 FPS
ultra	447 FPS	246 FPS
1440p
low	648 FPS	350 FPS
medium	552 FPS	310 FPS
high	452 FPS	260 FPS
ultra	369 FPS	217 FPS
4K
low	380 FPS	228 FPS
medium	326 FPS	203 FPS
high	293 FPS	180 FPS
ultra	258 FPS	149 FPS

Open Ryzen 9 3900X Open Xeon Platinum 8168

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Ryzen 9 3900X	Xeon Platinum 8168
1080p
low	813 FPS	809 FPS
medium	794 FPS	787 FPS
high	730 FPS	744 FPS
ultra	647 FPS	659 FPS
1440p
low	707 FPS	722 FPS
medium	583 FPS	617 FPS
high	522 FPS	583 FPS
ultra	459 FPS	515 FPS
4K
low	503 FPS	465 FPS
medium	403 FPS	364 FPS
high	361 FPS	324 FPS
ultra	292 FPS	263 FPS

Open Ryzen 9 3900X Open Xeon Platinum 8168

League of Legends

League of Legends

Valorant

Preset	Ryzen 9 3900X	Xeon Platinum 8168
1080p
low	813 FPS	809 FPS
medium	813 FPS	783 FPS
high	813 FPS	686 FPS
ultra	813 FPS	597 FPS
1440p
low	813 FPS	689 FPS
medium	813 FPS	604 FPS
high	714 FPS	526 FPS
ultra	619 FPS	452 FPS
4K
low	669 FPS	483 FPS
medium	594 FPS	434 FPS
high	525 FPS	388 FPS
ultra	437 FPS	338 FPS

Open Ryzen 9 3900X Open Xeon Platinum 8168

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Ryzen 9 3900X and Xeon Platinum 8168

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.

Xeon Platinum 8168

The Xeon Platinum 8168 is manufactured by Intel. It was released in 25 April 2017 (8 years ago). It is based on the Skylake (server) (2017−2018) architecture. It features 24 cores and 48 threads. Base frequency is 2.7 GHz, with boost up to 3.7 GHz. L3 cache: 33 MB. L2 cache: 24 MB. Built on 14 nm process technology. Socket: LGA3647. Thermal design power (TDP): 205 Watt. Memory support: DDR4-2666. Passmark benchmark score: 32,373 points. Launch price was $5,890.

⚡

Processing Power

The Ryzen 9 3900X packs 12 cores / 24 threads, while the Xeon Platinum 8168 offers 24 cores / 48 threads — the Xeon Platinum 8168 has 12 more cores. Boost clocks reach 4.6 GHz on the Ryzen 9 3900X versus 3.7 GHz on the Xeon Platinum 8168 — a 21.7% clock advantage for the Ryzen 9 3900X (base: 3.8 GHz vs 2.7 GHz). The Ryzen 9 3900X uses the Matisse (Zen 2) (2019−2020) architecture (7 nm, 12 nm), while the Xeon Platinum 8168 uses Skylake (server) (2017−2018) (14 nm). In PassMark, the Ryzen 9 3900X scores 32,517 against the Xeon Platinum 8168's 32,373 — a 0.4% lead for the Ryzen 9 3900X. L3 cache: 64 MB on the Ryzen 9 3900X vs 33 MB on the Xeon Platinum 8168.

Feature	Ryzen 9 3900X	Xeon Platinum 8168
Cores / Threads	12 / 24	24 / 48+100%
Boost Clock	4.6 GHz+24%	3.7 GHz
Base Clock	3.8 GHz+41%	2.7 GHz
L3 Cache	64 MB+94%	33 MB
L2 Cache	512K (per core)	24 MB+4700%
Process	7 nm, 12 nm-50%	14 nm
Architecture	Matisse (Zen 2) (2019−2020)	Skylake (server) (2017−2018)
PassMark	32,517	32,373
Geekbench 6 Single	1,300	—
Geekbench 6 Multi	12,000	—

🧠

Memory & Platform

The Ryzen 9 3900X uses the AM4 socket (PCIe 4.0), while the Xeon Platinum 8168 uses LGA3647 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-3200 on the Ryzen 9 3900X versus 2666 on the Xeon Platinum 8168 — the Xeon Platinum 8168 supports 199.4% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon Platinum 8168 supports up to 768 of RAM compared to 128 GB — 142.9% more capacity for professional workloads. Memory channels: 2 (Ryzen 9 3900X) vs 6 (Xeon Platinum 8168). PCIe lanes: 24 (Ryzen 9 3900X) vs 48 (Xeon Platinum 8168) — the Xeon Platinum 8168 offers 24 more lanes for additional GPUs or NVMe drives. Chipset compatibility: X570,B550 (Ryzen 9 3900X) and C621 (Xeon Platinum 8168).

Feature	Ryzen 9 3900X	Xeon Platinum 8168
Socket	AM4	LGA3647
PCIe Generation	PCIe 4.0+33%	PCIe 3.0
Max RAM Speed	DDR4-3200	2666+66550%
Max RAM Capacity	128 GB+17476167%	768
RAM Channels	2	6+200%
ECC Support	Yes	Yes
PCIe Lanes	24	48+100%

🔧

Advanced Features

Only the Ryzen 9 3900X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the Xeon Platinum 8168 supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: AMD-V (Ryzen 9 3900X) vs VT-x, VT-d (Xeon Platinum 8168). Primary use case: Ryzen 9 3900X targets Workstation. Direct competitor: Xeon Platinum 8168 rivals EPYC 7501.