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 9900X

2024

Why buy it

✅Better for gaming: +6.6% higher average FPS across 50 shared CPU benchmark tests.

Trade-offs

❌Lower Cinebench R23 multi-core (33,003 vs 38,010).
❌Launch MSRP is still $499 MSRP, while Ryzen 9 9955HX mostly shows up through inconsistent older-market listings.
❌118.2% higher power demand at 120W vs 55W.

Ryzen 9 9955HX

2025

Why buy it

✅+15.2% higher Cinebench R23 multi-core.
✅Draws 55W instead of 120W, a 65W reduction.
✅16.7% more PCIe lanes (28 vs 24) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 9900X across 50 shared CPU benchmark tests.

Ryzen 9 9900X

2024

Ryzen 9 9955HX

2025

Why buy it

✅Better for gaming: +6.6% higher average FPS across 50 shared CPU benchmark tests.

Why buy it

✅+15.2% higher Cinebench R23 multi-core.
✅Draws 55W instead of 120W, a 65W reduction.
✅16.7% more PCIe lanes (28 vs 24) for storage and expansion-heavy builds.

Trade-offs

❌Lower Cinebench R23 multi-core (33,003 vs 38,010).
❌Launch MSRP is still $499 MSRP, while Ryzen 9 9955HX mostly shows up through inconsistent older-market listings.
❌118.2% higher power demand at 120W vs 55W.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 9900X across 50 shared CPU benchmark tests.

Quick Answers

So, is Ryzen 9 9955HX better than Ryzen 9 9900X?

It depends on what matters more to you. For gaming, Ryzen 9 9900X is ahead with a 6.6% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Ryzen 9 9955HX pulls ahead with 15.2% better Cinebench R23 multi-core.

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

For streaming, content creation, and heavier multitasking, Ryzen 9 9955HX is the better fit. You are getting 15.2% better Cinebench R23 multi-core, backed by 16 cores and 32 threads.

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

Ryzen 9 9955HX is still the faster CPU overall, but Ryzen 9 9900X makes more sense if price matters more than absolute performance. Ryzen 9 9955HX is at an unclear MSRP at unclear MSRP versus $499 MSRP, and it gives you 15.2% better Cinebench R23 multi-core. The trade-off is that Ryzen 9 9900X is still the better pure gaming CPU with a 6.6% average FPS lead across 50 shared CPU game tests in our data. Ryzen 9 9900X is also 100.0% better value on MSRP (109.3 vs 0.0 PassMark/$), which is why it is easier to justify for price-conscious builds on paper.

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

Ryzen 9 9955HX is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2025 vs 2024) and more multi-core headroom with 16 cores / 32 threads instead of 12/24. 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 9900X Benchmark Check

Ryzen 9 9955HX Benchmark Check

Path of Exile 2

Preset	Ryzen 9 9900X	Ryzen 9 9955HX
1080p
low	287 FPS	284 FPS
medium	259 FPS	261 FPS
high	218 FPS	214 FPS
ultra	190 FPS	180 FPS
1440p
low	270 FPS	260 FPS
medium	218 FPS	217 FPS
high	170 FPS	167 FPS
ultra	152 FPS	147 FPS
4K
low	186 FPS	181 FPS
medium	151 FPS	151 FPS
high	112 FPS	115 FPS
ultra	100 FPS	102 FPS

Open Ryzen 9 9900X Open Ryzen 9 9955HX

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Ryzen 9 9900X	Ryzen 9 9955HX
1080p
low	772 FPS	666 FPS
medium	625 FPS	577 FPS
high	467 FPS	433 FPS
ultra	393 FPS	369 FPS
1440p
low	635 FPS	564 FPS
medium	534 FPS	503 FPS
high	412 FPS	389 FPS
ultra	321 FPS	305 FPS
4K
low	356 FPS	318 FPS
medium	303 FPS	288 FPS
high	266 FPS	253 FPS
ultra	224 FPS	214 FPS

Open Ryzen 9 9900X Open Ryzen 9 9955HX

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Ryzen 9 9900X	Ryzen 9 9955HX
1080p
low	899 FPS	848 FPS
medium	711 FPS	678 FPS
high	618 FPS	600 FPS
ultra	526 FPS	515 FPS
1440p
low	726 FPS	678 FPS
medium	577 FPS	542 FPS
high	492 FPS	469 FPS
ultra	418 FPS	397 FPS
4K
low	517 FPS	482 FPS
medium	432 FPS	399 FPS
high	388 FPS	359 FPS
ultra	322 FPS	301 FPS

Open Ryzen 9 9900X Open Ryzen 9 9955HX

League of Legends

League of Legends

Valorant

Preset	Ryzen 9 9900X	Ryzen 9 9955HX
1080p
low	1126 FPS	1071 FPS
medium	989 FPS	966 FPS
high	862 FPS	843 FPS
ultra	766 FPS	759 FPS
1440p
low	891 FPS	840 FPS
medium	774 FPS	746 FPS
high	677 FPS	651 FPS
ultra	580 FPS	564 FPS
4K
low	644 FPS	618 FPS
medium	569 FPS	553 FPS
high	502 FPS	487 FPS
ultra	433 FPS	420 FPS

Open Ryzen 9 9900X Open Ryzen 9 9955HX

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Ryzen 9 9900X and Ryzen 9 9955HX

Ryzen 9 9900X

The Ryzen 9 9900X is manufactured by AMD. It was released in 15 August 2024 (1 year ago). It is based on the Granite Ridge (2024−2025) architecture. It features 12 cores and 24 threads. Base frequency is 4.4 GHz, with boost up to 5.6 GHz. L3 cache: 64 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: AM5. Thermal design power (TDP): 120 Watt. Memory support: DDR5. Passmark benchmark score: 54,530 points. Launch price was $499.

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.

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Processing Power

The Ryzen 9 9900X packs 12 cores / 24 threads, while the Ryzen 9 9955HX offers 16 cores / 32 threads — the Ryzen 9 9955HX has 4 more cores. Boost clocks reach 5.6 GHz on the Ryzen 9 9900X versus 5.4 GHz on the Ryzen 9 9955HX — a 3.6% clock advantage for the Ryzen 9 9900X (base: 4.4 GHz vs 2.5 GHz). The Ryzen 9 9900X uses the Granite Ridge (2024−2025) architecture (4 nm), while the Ryzen 9 9955HX uses Fire Range-HX (Zen 5) (2025) (4 nm). In PassMark, the Ryzen 9 9900X scores 54,530 against the Ryzen 9 9955HX's 55,711 — a 2.1% lead for the Ryzen 9 9955HX. Cinebench R23 multi-core: 33,003 vs 38,010 (14.1% advantage for the Ryzen 9 9955HX). Geekbench 6 single-core — the metric most relevant to gaming — records 3,401 vs 3,219, a 5.5% lead for the Ryzen 9 9900X that directly translates to higher frame rates. Multi-core Geekbench: 19,756 vs 19,563 (1% advantage for the Ryzen 9 9900X). Both processors carry 64 MB (total) of L3 cache.

Feature	Ryzen 9 9900X	Ryzen 9 9955HX
Cores / Threads	12 / 24	16 / 32+33%
Boost Clock	5.6 GHz+4%	5.4 GHz
Base Clock	4.4 GHz+76%	2.5 GHz
L3 Cache	64 MB (total)	64 MB (total)
L2 Cache	1 MB (per core)	1 MB (per core)
Process	4 nm	4 nm
Architecture	Granite Ridge (2024−2025)	Fire Range-HX (Zen 5) (2025)
PassMark	54,530	55,711+2%
Cinebench R23 Multi	33,003	38,010+15%
Geekbench 6 Single	3,401+6%	3,219
Geekbench 6 Multi	19,756	19,563

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Memory & Platform

The Ryzen 9 9900X uses the AM5 socket (PCIe 5.0), while the Ryzen 9 9955HX uses FL1 (PCIe 5.0) — making them incompatible on the same motherboard. Both support up to DDR5-5600 memory speed. The Ryzen 9 9900X supports up to 256 GB of RAM compared to 96 GB — 90.9% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 24 (Ryzen 9 9900X) vs 28 (Ryzen 9 9955HX) — the Ryzen 9 9955HX offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: A620,B650,X670,X870 (Ryzen 9 9900X) and AMD FL1 (Ryzen 9 9955HX).

Feature	Ryzen 9 9900X	Ryzen 9 9955HX
Socket	AM5	FL1
PCIe Generation	PCIe 5.0	PCIe 5.0
Max RAM Speed	DDR5-5600	DDR5-5600
Max RAM Capacity	256 GB+167%	96 GB
RAM Channels	2	2
ECC Support	Yes	Yes
PCIe Lanes	24	28+17%

🔧

Advanced Features

Both processors feature an unlocked multiplier for overclocking. Both support AVX-512 instructions, benefiting scientific computing, AI inference, and encryption workloads. Virtualization support: AMD-V (Ryzen 9 9900X) vs true (Ryzen 9 9955HX). Both include integrated graphics — Radeon 610M (Ryzen 9 9900X) and Radeon 610M (Ryzen 9 9955HX) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Direct competitor: Ryzen 9 9955HX rivals Core Ultra 9 275HX.