Ryzen 9 9955HX vs Xeon Platinum 8358

Ryzen 9 9955HX vs Xeon Platinum 8358 Performance Spectrum

Ryzen 9 9955HX

16 / 32

55,711

+2.4%

Ryzen Threadripper 2970WX

Ryzen 7 9700X

Ryzen AI Max PRO 390

Ryzen Threadripper PRO 5955WX

Ryzen 9 9950X3D

Ryzen Threadripper PRO 7965WX

Ryzen Threadripper PRO 7975WX

Ryzen Threadripper PRO 7985WX

Xeon Platinum 8358

32 / 64

54,416

0.0%

About PassMark

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.

Ryzen 9 9955HX vs Xeon Platinum 8358 FPS Benchmarks

Predicted gaming performance across popular games. Tested paired with GeForce RTX 5090 to isolate CPU performance.

Search any supported game below to compare 1080p FPS for both components.

Ryzen 9 9955HX vs Xeon Platinum 8358: Pros, Cons & Final Verdict

See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.

Ryzen 9 9955HX

2025

Why buy it

✅Better for gaming: +12.8% higher average FPS across 50 shared CPU benchmark tests.
✅+33.3% larger total L3 cache (64 MB vs 48 MB).
✅Draws 55W instead of 250W, a 195W reduction.
✅Newer platform on FL1 with DDR5 support instead of LGA4189 and DDR4.
✅Integrated graphics onboard with Radeon 610M, while Xeon Platinum 8358 needs a discrete GPU.

Trade-offs

❌Less compelling for workstation-style loads than Xeon Platinum 8358, which brings 32 cores / 64 threads and 64 PCIe lanes.

Xeon Platinum 8358

2021

Why buy it

✅Better for workstations and heavier parallel workloads: 32 cores / 64 threads, plus 64 PCIe lanes vs 28.
✅128.6% more PCIe lanes (64 vs 28) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 9955HX across 50 shared CPU benchmark tests.
❌Lower PassMark (54,416 vs 55,711).
❌Smaller total L3 cache (48 MB vs 64 MB).
❌Launch MSRP is still $4,607 MSRP, while Ryzen 9 9955HX mostly shows up through inconsistent older-market listings.
❌354.5% higher power demand at 250W vs 55W.

Quick Answers

So, is Ryzen 9 9955HX better than Xeon Platinum 8358?

Not really, because they are built for different jobs. Xeon Platinum 8358 makes more sense for workstation-style multi-core throughput, while Ryzen 9 9955HX is the more practical desktop choice for gaming, platform cost, and everyday use.

Which one is better for gaming?

If gaming is the priority, Ryzen 9 9955HX is the better pick. According to our tests, it delivers 12.8% 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 9955HX is the stronger fit. You are getting 2.4% better PassMark, backed by 16 cores and 32 threads. It also has the larger cache pool with 33.3% larger total L3 cache (64 MB vs 48 MB).

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

Ryzen 9 9955HX is still the faster CPU overall, but Xeon Platinum 8358 is easier to justify if budget matters more than peak performance. Ryzen 9 9955HX comes in at an unclear MSRP at unclear MSRP versus $4,607 MSRP, and it still gives you a 12.8% average FPS lead across 50 shared CPU game tests in our data. Xeon Platinum 8358 is also 100.0% better value on MSRP (11.8 vs 0.0 PassMark/$), which is why it can still make sense for tighter-budget builds on paper.

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

Ryzen 9 9955HX makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2025 vs 2021), a healthier platform with FL1 and DDR5 instead of LGA4189, 33.3% larger total L3 cache (64 MB vs 48 MB), and more multi-core headroom with 16 cores / 32 threads instead of 32/64. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Ryzen 9 9955HX vs Xeon Platinum 8358 Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

Ryzen 9 9955HX

The Ryzen 9 9955HX is manufactured by AMD. It was released in 2025-01-01. It is based on the Fire Range-HX (Zen 5) (2025) architecture. It features 16 cores and 32 threads. Base frequency is 2.5 GHz, with boost up to 5.4 GHz. L3 cache: 64 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: FL1. Thermal design power (TDP): 55 Watt. Memory support: DDR5. Passmark benchmark score: 55,711 points. Launch price was $650.

Xeon Platinum 8358

The Xeon Platinum 8358 is manufactured by Intel. It was released in 2021-04-06. It is based on the Ice Lake-SP (2021) architecture. It features 32 cores and 64 threads. Base frequency is 2.6 GHz, with boost up to 3.4 GHz. L3 cache: 48 MB (total). L2 cache: 1 MB (per core). Built on 10 nm process technology. Socket: LGA4189. Thermal design power (TDP): 250 Watt. Memory support: DDR4-3200. Passmark benchmark score: 54,416 points. Launch price was $3,950.

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Processing Power

The Ryzen 9 9955HX packs 16 cores / 32 threads, while the Xeon Platinum 8358 offers 32 cores / 64 threads — the Xeon Platinum 8358 has 16 more cores. Boost clocks reach 5.4 GHz on the Ryzen 9 9955HX versus 3.4 GHz on the Xeon Platinum 8358 — a 45.5% clock advantage for the Ryzen 9 9955HX (base: 2.5 GHz vs 2.6 GHz). The Ryzen 9 9955HX uses the Fire Range-HX (Zen 5) (2025) architecture (4 nm), while the Xeon Platinum 8358 uses Ice Lake-SP (2021) (10 nm). In PassMark, the Ryzen 9 9955HX scores 55,711 against the Xeon Platinum 8358's 54,416 — a 2.4% lead for the Ryzen 9 9955HX. L3 cache: 64 MB (total) on the Ryzen 9 9955HX vs 48 MB (total) on the Xeon Platinum 8358.

Feature	Ryzen 9 9955HX	Xeon Platinum 8358
Cores / Threads	16 / 32	32 / 64+100%
Boost Clock	5.4 GHz+59%	3.4 GHz
Base Clock	2.5 GHz	2.6 GHz+4%
L3 Cache	64 MB (total)+33%	48 MB (total)
L2 Cache	1 MB (per core)	1 MB (per core)
Process	4 nm-60%	10 nm
Architecture	Fire Range-HX (Zen 5) (2025)	Ice Lake-SP (2021)
PassMark	55,711+2%	54,416
Cinebench R23 Multi	38,010	—
Geekbench 6 Single	3,219	—
Geekbench 6 Multi	19,563	—

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Memory & Platform

The Ryzen 9 9955HX uses the FL1 socket (PCIe 5.0), while the Xeon Platinum 8358 uses LGA4189 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-5600 on the Ryzen 9 9955HX versus 3200 on the Xeon Platinum 8358 — the Ryzen 9 9955HX supports 75% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon Platinum 8358 supports up to 4096 GB of RAM compared to 96 GB — 4166.7% more capacity for professional workloads. Memory channels: 2 (Ryzen 9 9955HX) vs 8 (Xeon Platinum 8358). PCIe lanes: 28 (Ryzen 9 9955HX) vs 64 (Xeon Platinum 8358) — the Xeon Platinum 8358 offers 36 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AMD FL1 (Ryzen 9 9955HX) and C621A (Xeon Platinum 8358).

Feature	Ryzen 9 9955HX	Xeon Platinum 8358
Socket	FL1	LGA4189
PCIe Generation	PCIe 5.0+25%	PCIe 4.0
Max RAM Speed	DDR5-5600+75%	3200
Max RAM Capacity	96 GB	4096 GB+4167%
RAM Channels	2	8+300%
ECC Support	Yes	Yes
PCIe Lanes	28	64+129%

🔧

Advanced Features

Only the Ryzen 9 9955HX has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Both support AVX-512 instructions, benefiting scientific computing, AI inference, and encryption workloads. Virtualization support: true (Ryzen 9 9955HX) vs VT-x, VT-d (Xeon Platinum 8358). The Ryzen 9 9955HX includes integrated graphics (Radeon 610M), while the Xeon Platinum 8358 requires a dedicated GPU. Direct competitor: Ryzen 9 9955HX rivals Core Ultra 9 275HX; Xeon Platinum 8358 rivals EPYC 7543.