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

✅+89.6% larger total L3 cache (64 MB vs 34 MB).
✅Costs $520 less on MSRP ($549 MSRP vs $1,069 MSRP).
✅Delivers 59.2% more PassMark for each dollar spent, at 71.0 vs 44.6 PassMark/$ ($549 MSRP vs $1,069 MSRP).
✅Draws 105W instead of 252W, a 147W reduction.

Trade-offs

❌Lower PassMark (38,955 vs 47,638).
❌Less compelling for workstation-style loads than Xeon w5-2555X, which brings 14 cores / 28 threads and 112 PCIe lanes.
❌Older platform position on AM4 with DDR4, while Xeon w5-2555X moves to LGA4677 and DDR5.

Xeon w5-2555X

2024

Why buy it

✅+22.3% higher PassMark.
✅Better for workstations and heavier parallel workloads: 14 cores / 28 threads, plus 112 PCIe lanes vs 24.
✅Newer platform on LGA4677 with DDR5 support instead of AM4 and DDR4.
✅366.7% more PCIe lanes (112 vs 24) for storage and expansion-heavy builds.

Trade-offs

❌Smaller total L3 cache (34 MB vs 64 MB).
❌Lower PassMark per dollar, at 44.6 vs 71.0 PassMark/$ ($1,069 MSRP vs $549 MSRP).
❌140% higher power demand at 252W vs 105W.

Ryzen 9 5900X

2020

Xeon w5-2555X

2024

Why buy it

✅+89.6% larger total L3 cache (64 MB vs 34 MB).
✅Costs $520 less on MSRP ($549 MSRP vs $1,069 MSRP).
✅Delivers 59.2% more PassMark for each dollar spent, at 71.0 vs 44.6 PassMark/$ ($549 MSRP vs $1,069 MSRP).
✅Draws 105W instead of 252W, a 147W reduction.

Why buy it

✅+22.3% higher PassMark.
✅Better for workstations and heavier parallel workloads: 14 cores / 28 threads, plus 112 PCIe lanes vs 24.
✅Newer platform on LGA4677 with DDR5 support instead of AM4 and DDR4.
✅366.7% more PCIe lanes (112 vs 24) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (38,955 vs 47,638).
❌Less compelling for workstation-style loads than Xeon w5-2555X, which brings 14 cores / 28 threads and 112 PCIe lanes.
❌Older platform position on AM4 with DDR4, while Xeon w5-2555X moves to LGA4677 and DDR5.

Trade-offs

❌Smaller total L3 cache (34 MB vs 64 MB).
❌Lower PassMark per dollar, at 44.6 vs 71.0 PassMark/$ ($1,069 MSRP vs $549 MSRP).
❌140% higher power demand at 252W vs 105W.

Quick Answers

So, is Xeon w5-2555X better than Ryzen 9 5900X?

Not in a simple one-size-fits-all way. Xeon w5-2555X 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 gaming?

For gaming, the two CPUs are effectively a wash in the available data.

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

For streaming, content creation, and heavier multitasking, Xeon w5-2555X is the better fit. You are getting 22.3% better PassMark, backed by 14 cores and 28 threads.

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

Xeon w5-2555X is still the faster CPU overall, but Ryzen 9 5900X makes more sense if price matters more than absolute performance. Xeon w5-2555X is 94.7% more expensive on MSRP at $1,069 MSRP versus $549 MSRP, and it gives you a 0.8% average FPS lead across 35 shared CPU game tests in our data. Ryzen 9 5900X is also 59.2% better value on MSRP (71.0 vs 44.6 PassMark/$), which is why it is easier to justify for price-conscious builds on paper.

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

Xeon w5-2555X is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2024 vs 2020), a healthier platform with LGA4677 and DDR5 instead of AM4, more multi-core headroom with 14 cores / 28 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 w5-2555X Benchmark Check

Path of Exile 2

Preset	Ryzen 9 5900X	Xeon w5-2555X
1080p
low	323 FPS	323 FPS
medium	291 FPS	294 FPS
high	243 FPS	239 FPS
ultra	193 FPS	202 FPS
1440p
low	307 FPS	285 FPS
medium	248 FPS	232 FPS
high	192 FPS	177 FPS
ultra	157 FPS	156 FPS
4K
low	193 FPS	196 FPS
medium	156 FPS	159 FPS
high	115 FPS	121 FPS
ultra	103 FPS	107 FPS

Open Ryzen 9 5900X Open Xeon w5-2555X

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Ryzen 9 5900X	Xeon w5-2555X
1080p
low	772 FPS	626 FPS
medium	647 FPS	519 FPS
high	508 FPS	424 FPS
ultra	450 FPS	384 FPS
1440p
low	619 FPS	517 FPS
medium	536 FPS	450 FPS
high	443 FPS	378 FPS
ultra	364 FPS	326 FPS
4K
low	365 FPS	321 FPS
medium	318 FPS	281 FPS
high	289 FPS	258 FPS
ultra	255 FPS	228 FPS

Open Ryzen 9 5900X Open Xeon w5-2555X

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Ryzen 9 5900X	Xeon w5-2555X
1080p
low	832 FPS	1025 FPS
medium	645 FPS	1191 FPS
high	558 FPS	1136 FPS
ultra	459 FPS	875 FPS
1440p
low	721 FPS	1025 FPS
medium	565 FPS	953 FPS
high	488 FPS	859 FPS
ultra	407 FPS	656 FPS
4K
low	511 FPS	656 FPS
medium	421 FPS	553 FPS
high	374 FPS	494 FPS
ultra	308 FPS	420 FPS

Open Ryzen 9 5900X Open Xeon w5-2555X

League of Legends

League of Legends

Valorant

Preset	Ryzen 9 5900X	Xeon w5-2555X
1080p
low	974 FPS	1191 FPS
medium	974 FPS	1015 FPS
high	934 FPS	982 FPS
ultra	826 FPS	847 FPS
1440p
low	959 FPS	1023 FPS
medium	843 FPS	883 FPS
high	726 FPS	767 FPS
ultra	617 FPS	653 FPS
4K
low	694 FPS	733 FPS
medium	621 FPS	637 FPS
high	541 FPS	562 FPS
ultra	437 FPS	437 FPS

Open Ryzen 9 5900X Open Xeon w5-2555X

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Ryzen 9 5900X and Xeon w5-2555X

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 w5-2555X

The Xeon w5-2555X is manufactured by Intel. It was released in 2015-01-01. It features 14 cores and 28 threads. Base frequency is 3.3 GHz, with boost up to 4.8 GHz. L3 cache: 33.75 MB Intel® Smart Cache. Built on Intel 7 nm process technology. Socket: LGA4677. Thermal design power (TDP): 252 Watt. Memory support: DDR5-4800. Passmark benchmark score: 47,638 points. Launch price was $800.

⚡

Processing Power

The Ryzen 9 5900X packs 12 cores / 24 threads, while the Xeon w5-2555X offers 14 cores / 28 threads — the Xeon w5-2555X has 2 more cores. Boost clocks reach 4.8 GHz on the Ryzen 9 5900X versus 4.8 GHz on the Xeon w5-2555X — identical boost frequencies (base: 3.7 GHz vs 3.3 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 w5-2555X's 47,638 — a 20.1% lead for the Xeon w5-2555X. L3 cache: 64 MB on the Ryzen 9 5900X vs 33.75 MB Intel® Smart Cache on the Xeon w5-2555X.

Feature	Ryzen 9 5900X	Xeon w5-2555X
Cores / Threads	12 / 24	14 / 28+17%
Boost Clock	4.8 GHz	4.8 GHz
Base Clock	3.7 GHz+12%	3.3 GHz
L3 Cache	64 MB+90%	33.75 MB Intel® Smart Cache
L2 Cache	512K (per core)	—
Process	7 nm, 12 nm	Intel 7 nm
Architecture	Vermeer (Zen3) (2020−2022)	—
PassMark	38,955	47,638+22%
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 w5-2555X 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 w5-2555X — the Xeon w5-2555X supports 199.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon w5-2555X 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 w5-2555X). PCIe lanes: 24 (Ryzen 9 5900X) vs 112 (Xeon w5-2555X) — the Xeon w5-2555X offers 88 more lanes for additional GPUs or NVMe drives. Chipset compatibility: A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X) and W790 (Xeon w5-2555X).

Feature	Ryzen 9 5900X	Xeon w5-2555X
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	112+367%

🔧

Advanced Features

Both processors feature an unlocked multiplier for overclocking. Only the Xeon w5-2555X supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: AMD-V (Ryzen 9 5900X) vs VT-x, VT-d (Xeon w5-2555X). Primary use case: Ryzen 9 5900X targets Workstation. Direct competitor: Ryzen 9 5900X rivals Core i9-12900K; Xeon w5-2555X rivals Threadripper PRO 7965WX.

Feature	Ryzen 9 5900X	Xeon w5-2555X
Integrated GPU	No	No
IGPU Model	—	None
Unlocked	Yes	Yes
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 w5-2555X debuted at $1069. On MSRP ($549 vs $1069), the Ryzen 9 5900X is $520 cheaper. In terms of value on MSRP (PassMark points per dollar), the Ryzen 9 5900X delivers 71.0 pts/$ vs 44.6 pts/$ for the Xeon w5-2555X — making the Ryzen 9 5900X the 45.7% better value option.