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: +13.1% higher average FPS across 4 shared CPU benchmark tests.
✅+33.3% larger total L3 cache (64 MB vs 48 MB).
✅Costs $14 less on MSRP ($549 MSRP vs $563 MSRP).
✅Draws 105W instead of 150W, a 45W reduction.

Trade-offs

❌Lower PassMark (38,955 vs 39,341).
❌Less compelling for workstation-style loads than Xeon 6505P, which brings 12 cores / 24 threads and 88 PCIe lanes.
❌Older platform position on AM4 with DDR4, while Xeon 6505P moves to LGA4710 and DDR5.

Xeon 6505P

2025

Why buy it

✅+1% higher PassMark.
✅Better for workstations and heavier parallel workloads: 12 cores / 24 threads, plus 88 PCIe lanes vs 24.
✅Newer platform on LGA4710 with DDR5 support instead of AM4 and DDR4.
✅266.7% more PCIe lanes (88 vs 24) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 5900X across 4 shared CPU benchmark tests.
❌Smaller total L3 cache (48 MB vs 64 MB).
❌
2.6% HIGHER MSRP
$563 MSRPvs$549 MSRP
❌42.9% higher power demand at 150W vs 105W.

Ryzen 9 5900X

2020

Xeon 6505P

2025

Why buy it

✅Better for gaming: +13.1% higher average FPS across 4 shared CPU benchmark tests.
✅+33.3% larger total L3 cache (64 MB vs 48 MB).
✅Costs $14 less on MSRP ($549 MSRP vs $563 MSRP).
✅Draws 105W instead of 150W, a 45W reduction.

Why buy it

✅+1% higher PassMark.
✅Better for workstations and heavier parallel workloads: 12 cores / 24 threads, plus 88 PCIe lanes vs 24.
✅Newer platform on LGA4710 with DDR5 support instead of AM4 and DDR4.
✅266.7% more PCIe lanes (88 vs 24) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (38,955 vs 39,341).
❌Less compelling for workstation-style loads than Xeon 6505P, which brings 12 cores / 24 threads and 88 PCIe lanes.
❌Older platform position on AM4 with DDR4, while Xeon 6505P moves to LGA4710 and DDR5.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 5900X across 4 shared CPU benchmark tests.
❌Smaller total L3 cache (48 MB vs 64 MB).
❌
2.6% HIGHER MSRP
$563 MSRPvs$549 MSRP
❌42.9% higher power demand at 150W vs 105W.

Quick Answers

So, is Ryzen 9 5900X better than Xeon 6505P?

Not in a simple one-size-fits-all way. Xeon 6505P 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 6505P is the better fit. You are getting 1% better PassMark, backed by 12 cores and 24 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 $14 cheaper on MSRP at $549 MSRP versus $563 MSRP, and it gives you a 13.1% average FPS lead across 4 shared CPU game tests in our data. The trade-off is that Xeon 6505P is still stronger for heavier multi-core work with 1% better PassMark. It is also 1.5% better value on MSRP (71.0 vs 69.9 PassMark/$), 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 6505P is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2025 vs 2020), a healthier platform with LGA4710 and DDR5 instead of AM4, more multi-core headroom with 12 cores / 24 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 6505P Benchmark Check

Path of Exile 2

Preset	Ryzen 9 5900X	Xeon 6505P
1080p
low	323 FPS	183 FPS
medium	291 FPS	147 FPS
high	243 FPS	119 FPS
ultra	193 FPS	95 FPS
1440p
low	307 FPS	153 FPS
medium	248 FPS	120 FPS
high	192 FPS	93 FPS
ultra	157 FPS	75 FPS
4K
low	193 FPS	70 FPS
medium	156 FPS	59 FPS
high	115 FPS	46 FPS
ultra	103 FPS	38 FPS

Open Ryzen 9 5900X Open Xeon 6505P

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Ryzen 9 5900X	Xeon 6505P
1080p
low	772 FPS	292 FPS
medium	647 FPS	261 FPS
high	508 FPS	216 FPS
ultra	450 FPS	192 FPS
1440p
low	619 FPS	252 FPS
medium	536 FPS	227 FPS
high	443 FPS	194 FPS
ultra	364 FPS	161 FPS
4K
low	365 FPS	158 FPS
medium	318 FPS	144 FPS
high	289 FPS	134 FPS
ultra	255 FPS	120 FPS

Open Ryzen 9 5900X Open Xeon 6505P

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Ryzen 9 5900X	Xeon 6505P
1080p
low	832 FPS	984 FPS
medium	645 FPS	947 FPS
high	558 FPS	875 FPS
ultra	459 FPS	792 FPS
1440p
low	721 FPS	810 FPS
medium	565 FPS	719 FPS
high	488 FPS	663 FPS
ultra	407 FPS	595 FPS
4K
low	511 FPS	511 FPS
medium	421 FPS	421 FPS
high	374 FPS	371 FPS
ultra	308 FPS	304 FPS

Open Ryzen 9 5900X Open Xeon 6505P

League of Legends

League of Legends

Valorant

Preset	Ryzen 9 5900X	Xeon 6505P
1080p
low	974 FPS	927 FPS
medium	974 FPS	838 FPS
high	934 FPS	722 FPS
ultra	826 FPS	626 FPS
1440p
low	959 FPS	718 FPS
medium	843 FPS	632 FPS
high	726 FPS	541 FPS
ultra	617 FPS	469 FPS
4K
low	694 FPS	523 FPS
medium	621 FPS	467 FPS
high	541 FPS	410 FPS
ultra	437 FPS	353 FPS

Open Ryzen 9 5900X Open Xeon 6505P

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Ryzen 9 5900X and Xeon 6505P

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 6505P

The Xeon 6505P is manufactured by Intel. It was released in 24 February 2025 (less than a year ago). It is based on the Granite Rapids (2024−2025) architecture. It features 12 cores and 24 threads. Base frequency is 2.2 GHz, with boost up to 4.1 GHz. L3 cache: 48 MB (total). L2 cache: 2 MB (per core). Built on Intel 3 nm process technology. Socket: LGA4710. Thermal design power (TDP): 150 Watt. Memory support: DDR5(6400MT/s). Passmark benchmark score: 39,341 points. Launch price was $563.

⚡

Processing Power

Both the Ryzen 9 5900X and Xeon 6505P share an identical 12-core/24-thread configuration. Boost clocks reach 4.8 GHz on the Ryzen 9 5900X versus 4.1 GHz on the Xeon 6505P — a 15.7% clock advantage for the Ryzen 9 5900X (base: 3.7 GHz vs 2.2 GHz). The Ryzen 9 5900X uses the Vermeer (Zen3) (2020−2022) architecture (7 nm, 12 nm), while the Xeon 6505P uses Granite Rapids (2024−2025) (Intel 3 nm). In PassMark, the Ryzen 9 5900X scores 38,955 against the Xeon 6505P's 39,341 — a 1% lead for the Xeon 6505P. L3 cache: 64 MB on the Ryzen 9 5900X vs 48 MB (total) on the Xeon 6505P.

Feature	Ryzen 9 5900X	Xeon 6505P
Cores / Threads	12 / 24	12 / 24
Boost Clock	4.8 GHz+17%	4.1 GHz
Base Clock	3.7 GHz+68%	2.2 GHz
L3 Cache	64 MB+33%	48 MB (total)
L2 Cache	512K (per core)	2 MB (per core)+300%
Process	7 nm, 12 nm	Intel 3 nm-57%
Architecture	Vermeer (Zen3) (2020−2022)	Granite Rapids (2024−2025)
PassMark	38,955	39,341
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 6505P uses LGA4710 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-3200 on the Ryzen 9 5900X versus 6400 on the Xeon 6505P — the Xeon 6505P supports 199.8% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon 6505P 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 6505P). PCIe lanes: 24 (Ryzen 9 5900X) vs 88 (Xeon 6505P) — the Xeon 6505P offers 64 more lanes for additional GPUs or NVMe drives. Chipset compatibility: A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X) and LGA4710 (Xeon 6505P).

Feature	Ryzen 9 5900X	Xeon 6505P
Socket	AM4	LGA4710
PCIe Generation	PCIe 4.0	PCIe 5.0+25%
Max RAM Speed	DDR4-3200	6400+159900%
Max RAM Capacity	128 GB+3276700%	4096
RAM Channels	2	8+300%
ECC Support	Yes	Yes
PCIe Lanes	24	88+267%

🔧

Advanced Features

Only the Ryzen 9 5900X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the Xeon 6505P supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: AMD-V (Ryzen 9 5900X) vs VT-x, VT-d (Xeon 6505P). Primary use case: Ryzen 9 5900X targets Workstation. Direct competitor: Ryzen 9 5900X rivals Core i9-12900K; Xeon 6505P rivals EPYC 9334.

Feature	Ryzen 9 5900X	Xeon 6505P
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 6505P debuted at $563. On MSRP ($549 vs $563), the Ryzen 9 5900X is $14 cheaper. In terms of value on MSRP (PassMark points per dollar), the Ryzen 9 5900X delivers 71.0 pts/$ vs 69.9 pts/$ for the Xeon 6505P — making the Ryzen 9 5900X the 1.5% better value option.