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 5900X

2020

Why buy it

✅Better for gaming: +34.8% higher average FPS across 50 shared CPU benchmark tests.
✅+21.9% larger total L3 cache (64 MB vs 53 MB).
✅Costs $1,612 less on MSRP ($549 MSRP vs $2,161 MSRP).
✅Delivers 167.0% more PassMark for each dollar spent, at 71.0 vs 26.6 PassMark/$ ($549 MSRP vs $2,161 MSRP).
✅Draws 105W instead of 195W, a 90W reduction.

Trade-offs

❌Lower PassMark (38,955 vs 57,434).
❌Less compelling for workstation-style loads than Xeon Gold 6423N, which brings 28 cores / 56 threads and 80 PCIe lanes.
❌Older platform position on AM4 with DDR4, while Xeon Gold 6423N moves to LGA4677 and DDR5.

Xeon Gold 6423N

2023

Why buy it

✅+47.4% higher PassMark.
✅Better for workstations and heavier parallel workloads: 28 cores / 56 threads, plus 80 PCIe lanes vs 24.
✅Newer platform on LGA4677 with DDR5 support instead of AM4 and DDR4.
✅233.3% more PCIe lanes (80 vs 24) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 5900X across 50 shared CPU benchmark tests.
❌Smaller total L3 cache (53 MB vs 64 MB).
❌Lower PassMark per dollar, at 26.6 vs 71.0 PassMark/$ ($2,161 MSRP vs $549 MSRP).
❌85.7% higher power demand at 195W vs 105W.

Ryzen 9 5900X

2020

Xeon Gold 6423N

2023

Why buy it

✅Better for gaming: +34.8% higher average FPS across 50 shared CPU benchmark tests.
✅+21.9% larger total L3 cache (64 MB vs 53 MB).
✅Costs $1,612 less on MSRP ($549 MSRP vs $2,161 MSRP).
✅Delivers 167.0% more PassMark for each dollar spent, at 71.0 vs 26.6 PassMark/$ ($549 MSRP vs $2,161 MSRP).
✅Draws 105W instead of 195W, a 90W reduction.

Why buy it

✅+47.4% higher PassMark.
✅Better for workstations and heavier parallel workloads: 28 cores / 56 threads, plus 80 PCIe lanes vs 24.
✅Newer platform on LGA4677 with DDR5 support instead of AM4 and DDR4.
✅233.3% more PCIe lanes (80 vs 24) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (38,955 vs 57,434).
❌Less compelling for workstation-style loads than Xeon Gold 6423N, which brings 28 cores / 56 threads and 80 PCIe lanes.
❌Older platform position on AM4 with DDR4, while Xeon Gold 6423N moves to LGA4677 and DDR5.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 5900X across 50 shared CPU benchmark tests.
❌Smaller total L3 cache (53 MB vs 64 MB).
❌Lower PassMark per dollar, at 26.6 vs 71.0 PassMark/$ ($2,161 MSRP vs $549 MSRP).
❌85.7% higher power demand at 195W vs 105W.

Quick Answers

So, is Ryzen 9 5900X better than Xeon Gold 6423N?

Not in a simple one-size-fits-all way. Xeon Gold 6423N makes more sense for workstation-style multi-core throughput, while Ryzen 9 5900X 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, Xeon Gold 6423N is the better fit. You are getting 47.4% better PassMark, backed by 28 cores and 56 threads.

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

Ryzen 9 5900X is the smarter buy today. Ryzen 9 5900X is $1,612 cheaper on MSRP at $549 MSRP versus $2,161 MSRP, and it gives you a 34.8% average FPS lead across 50 shared CPU game tests in our data. The trade-off is that Xeon Gold 6423N is still stronger for heavier multi-core work with 47.4% better PassMark. It is also 167.0% better value on MSRP (71.0 vs 26.6 PassMark/$), 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 6423N is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2020), a healthier platform with LGA4677 and DDR5 instead of AM4, more multi-core headroom with 28 cores / 56 threads instead of 12/24, and AVX-512 support for heavier modern compute workloads. 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 9 5900X Benchmark Check

Xeon Gold 6423N Benchmark Check

Path of Exile 2

Preset	Ryzen 9 5900X	Xeon Gold 6423N
1080p
low	323 FPS	194 FPS
medium	291 FPS	157 FPS
high	243 FPS	127 FPS
ultra	193 FPS	100 FPS
1440p
low	307 FPS	157 FPS
medium	248 FPS	123 FPS
high	192 FPS	96 FPS
ultra	157 FPS	76 FPS
4K
low	193 FPS	72 FPS
medium	156 FPS	60 FPS
high	115 FPS	47 FPS
ultra	103 FPS	38 FPS

Open Ryzen 9 5900X Open Xeon Gold 6423N

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Ryzen 9 5900X	Xeon Gold 6423N
1080p
low	772 FPS	237 FPS
medium	647 FPS	211 FPS
high	508 FPS	175 FPS
ultra	450 FPS	142 FPS
1440p
low	619 FPS	199 FPS
medium	536 FPS	181 FPS
high	443 FPS	155 FPS
ultra	364 FPS	120 FPS
4K
low	365 FPS	124 FPS
medium	318 FPS	115 FPS
high	289 FPS	101 FPS
ultra	255 FPS	82 FPS

Open Ryzen 9 5900X Open Xeon Gold 6423N

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Ryzen 9 5900X	Xeon Gold 6423N
1080p
low	832 FPS	945 FPS
medium	645 FPS	827 FPS
high	558 FPS	782 FPS
ultra	459 FPS	693 FPS
1440p
low	721 FPS	748 FPS
medium	565 FPS	645 FPS
high	488 FPS	610 FPS
ultra	407 FPS	541 FPS
4K
low	511 FPS	480 FPS
medium	421 FPS	379 FPS
high	374 FPS	337 FPS
ultra	308 FPS	275 FPS

Open Ryzen 9 5900X Open Xeon Gold 6423N

League of Legends

League of Legends

Valorant

Preset	Ryzen 9 5900X	Xeon Gold 6423N
1080p
low	974 FPS	924 FPS
medium	974 FPS	835 FPS
high	934 FPS	719 FPS
ultra	826 FPS	621 FPS
1440p
low	959 FPS	713 FPS
medium	843 FPS	628 FPS
high	726 FPS	538 FPS
ultra	617 FPS	460 FPS
4K
low	694 FPS	515 FPS
medium	621 FPS	461 FPS
high	541 FPS	404 FPS
ultra	437 FPS	349 FPS

Open Ryzen 9 5900X Open Xeon Gold 6423N

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Ryzen 9 5900X and Xeon Gold 6423N

Ryzen 9 5900X

The Ryzen 9 5900X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen3) (2020−2022) architecture. It features 12 cores and 24 threads. Base frequency is 3.7 GHz, with boost up to 4.8 GHz. L3 cache: 64 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4-3200. Passmark benchmark score: 38,955 points. Launch price was $549.

Xeon Gold 6423N

The Xeon Gold 6423N is manufactured by Intel. It was released in 2023-07-01. It features 28 cores and 56 threads. Base frequency is 2 GHz, with boost up to 3.6 GHz. L3 cache: 52.5 MB. Built on Intel 7 nm process technology. Socket: LGA4677. Thermal design power (TDP): 195 Watt. Memory support: DDR5-4400. Passmark benchmark score: 57,434 points. Launch price was $2,161.

⚡

Processing Power

The Ryzen 9 5900X packs 12 cores / 24 threads, while the Xeon Gold 6423N offers 28 cores / 56 threads — the Xeon Gold 6423N has 16 more cores. Boost clocks reach 4.8 GHz on the Ryzen 9 5900X versus 3.6 GHz on the Xeon Gold 6423N — a 28.6% clock advantage for the Ryzen 9 5900X (base: 3.7 GHz vs 2 GHz). The Ryzen 9 5900X is built on the Vermeer (Zen3) (2020−2022) architecture. In PassMark, the Ryzen 9 5900X scores 38,955 against the Xeon Gold 6423N's 57,434 — a 38.3% lead for the Xeon Gold 6423N. L3 cache: 64 MB on the Ryzen 9 5900X vs 52.5 MB on the Xeon Gold 6423N.

Feature	Ryzen 9 5900X	Xeon Gold 6423N
Cores / Threads	12 / 24	28 / 56+133%
Boost Clock	4.8 GHz+33%	3.6 GHz
Base Clock	3.7 GHz+85%	2 GHz
L3 Cache	64 MB+22%	52.5 MB
L2 Cache	512K (per core)	—
Process	7 nm, 12 nm	Intel 7 nm
Architecture	Vermeer (Zen3) (2020−2022)	—
PassMark	38,955	57,434+47%
Cinebench R23 Multi	21,000	—
Geekbench 6 Single	2,174	—
Geekbench 6 Multi	11,888	—

🧠

Memory & Platform

The Ryzen 9 5900X uses the AM4 socket (PCIe 4.0), while the Xeon Gold 6423N uses LGA4677 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-3200 on the Ryzen 9 5900X versus 4800 on the Xeon Gold 6423N — the Xeon Gold 6423N supports 199.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon Gold 6423N supports up to 4096 of RAM compared to 128 GB — 187.9% more capacity for professional workloads. Memory channels: 2 (Ryzen 9 5900X) vs 8 (Xeon Gold 6423N). PCIe lanes: 24 (Ryzen 9 5900X) vs 80 (Xeon Gold 6423N) — the Xeon Gold 6423N offers 56 more lanes for additional GPUs or NVMe drives. Chipset compatibility: A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X) and C741 (Xeon Gold 6423N).

Feature	Ryzen 9 5900X	Xeon Gold 6423N
Socket	AM4	LGA4677
PCIe Generation	PCIe 4.0	PCIe 5.0+25%
Max RAM Speed	DDR4-3200	4800+119900%
Max RAM Capacity	128 GB+3276700%	4096
RAM Channels	2	8+300%
ECC Support	Yes	Yes
PCIe Lanes	24	80+233%

🔧

Advanced Features

Only the Ryzen 9 5900X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the Xeon Gold 6423N supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: AMD-V (Ryzen 9 5900X) vs VT-x, VT-d (Xeon Gold 6423N). Primary use case: Ryzen 9 5900X targets Workstation. Direct competitor: Ryzen 9 5900X rivals Core i9-12900K; Xeon Gold 6423N rivals EPYC 9354.

Feature	Ryzen 9 5900X	Xeon Gold 6423N
Integrated GPU	No	No
IGPU Model	—	None
Unlocked	Yes	No
AVX-512	No	Yes
Virtualization	AMD-V	VT-x, VT-d
Target Use	Workstation	—

💰

Value Analysis

The Ryzen 9 5900X launched at $549 MSRP, while the Xeon Gold 6423N debuted at $2161. On MSRP ($549 vs $2161), the Ryzen 9 5900X is $1612 cheaper. In terms of value on MSRP (PassMark points per dollar), the Ryzen 9 5900X delivers 71.0 pts/$ vs 26.6 pts/$ for the Xeon Gold 6423N — making the Ryzen 9 5900X the 91% better value option.