Ryzen 9 5900X vs Ryzen 9 8945HX

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 5900X vs Ryzen 9 8945HX 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 5900X vs Ryzen 9 8945HX: 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 5900X

2020

Why buy it

✅Better for gaming: +9.0% higher average FPS across 50 shared CPU benchmark tests.

Trade-offs

❌Lower PassMark (38,955 vs 53,211).
❌Launch MSRP is still $549 MSRP, while Ryzen 9 8945HX mostly shows up through inconsistent older-market listings.
❌90.9% higher power demand at 105W vs 55W.
❌Older platform position on AM4 with DDR4, while Ryzen 9 8945HX moves to FL1 and DDR5.
❌No integrated graphics, while Ryzen 9 8945HX can still boot and troubleshoot without a discrete GPU.

Ryzen 9 8945HX

2025

Why buy it

✅+36.6% higher PassMark.
✅Draws 55W instead of 105W, a 50W reduction.
✅Newer platform on FL1 with DDR5 support instead of AM4 and DDR4.
✅16.7% more PCIe lanes (28 vs 24) for storage and expansion-heavy builds.
✅Integrated graphics onboard with AMD Radeon 610M, while Ryzen 9 5900X needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 5900X across 50 shared CPU benchmark tests.

Quick Answers

So, is Ryzen 9 8945HX better than Ryzen 9 5900X?

It depends on what you want from the system. For gaming, Ryzen 9 5900X is ahead with a 9.0% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Ryzen 9 8945HX pulls ahead with 36.6% better PassMark.

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

For streaming, content creation, and heavier multitasking, Ryzen 9 8945HX is the stronger fit. You are getting 36.6% better PassMark, backed by 16 cores and 32 threads.

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

Ryzen 9 8945HX is still the faster CPU overall, but Ryzen 9 5900X is easier to justify if budget matters more than peak performance. Ryzen 9 8945HX comes in at an unclear MSRP at unclear MSRP versus $549 MSRP, and it still gives you 36.6% better PassMark. The compromise is that Ryzen 9 5900X is still the better pure gaming CPU with a 9.0% average FPS lead across 50 shared CPU game tests in our data. Ryzen 9 5900X is also 100.0% better value on MSRP (71.0 vs 0.0 PassMark/$), 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 8945HX makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2025 vs 2020), a healthier platform with FL1 and DDR5 instead of AM4, and more multi-core headroom with 16 cores / 32 threads instead of 12/24. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Ryzen 9 5900X vs Ryzen 9 8945HX Technical Specifications

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

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.

Ryzen 9 8945HX

The Ryzen 9 8945HX is manufactured by AMD. It was released in 2025-04-01. It is based on the Dragon Range (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 5 nm process technology. Socket: FL1. Thermal design power (TDP): 55 Watt. Memory support: DDR5. Passmark benchmark score: 53,211 points. Launch price was $700.

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Processing Power

The Ryzen 9 5900X packs 12 cores / 24 threads, while the Ryzen 9 8945HX offers 16 cores / 32 threads — the Ryzen 9 8945HX has 4 more cores. Boost clocks reach 4.8 GHz on the Ryzen 9 5900X versus 5.4 GHz on the Ryzen 9 8945HX — a 11.8% clock advantage for the Ryzen 9 8945HX (base: 3.7 GHz vs 2.5 GHz). The Ryzen 9 5900X uses the Vermeer (Zen3) (2020−2022) architecture (7 nm, 12 nm), while the Ryzen 9 8945HX uses Dragon Range (2025) (5 nm). In PassMark, the Ryzen 9 5900X scores 38,955 against the Ryzen 9 8945HX's 53,211 — a 30.9% lead for the Ryzen 9 8945HX. L3 cache: 64 MB on the Ryzen 9 5900X vs 64 MB (total) on the Ryzen 9 8945HX.

Feature	Ryzen 9 5900X	Ryzen 9 8945HX
Cores / Threads	12 / 24	16 / 32+33%
Boost Clock	4.8 GHz	5.4 GHz+13%
Base Clock	3.7 GHz+48%	2.5 GHz
L3 Cache	64 MB	64 MB (total)
L2 Cache	512K (per core)+51100%	1 MB (per core)
Process	7 nm, 12 nm	5 nm-29%
Architecture	Vermeer (Zen3) (2020−2022)	Dragon Range (2025)
PassMark	38,955	53,211+37%
Cinebench R23 Multi	21,000	—
Geekbench 6 Single	2,174	—
Geekbench 6 Multi	11,888	—

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Memory & Platform

The Ryzen 9 5900X uses the AM4 socket (PCIe 4.0), while the Ryzen 9 8945HX uses FL1 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-3200 on the Ryzen 9 5900X versus 5600 on the Ryzen 9 8945HX — the Ryzen 9 8945HX supports 75% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 9 5900X supports up to 128 GB of RAM compared to 96 GB — 33.3% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 24 (Ryzen 9 5900X) vs 28 (Ryzen 9 8945HX) — the Ryzen 9 8945HX offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X) and FL1 (Ryzen 9 8945HX).

Feature	Ryzen 9 5900X	Ryzen 9 8945HX
Socket	AM4	FL1
PCIe Generation	PCIe 4.0	PCIe 5.0+25%
Max RAM Speed	DDR4-3200	5600+75%
Max RAM Capacity	128 GB+33%	96 GB
RAM Channels	2	2
ECC Support	Yes	Yes
PCIe Lanes	24	28+17%

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Advanced Features

Both processors feature an unlocked multiplier for overclocking. Only the Ryzen 9 8945HX supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: AMD-V (Ryzen 9 5900X) vs VT-x, VT-d, AMD-V (Ryzen 9 8945HX). The Ryzen 9 8945HX includes integrated graphics (AMD Radeon 610M), while the Ryzen 9 5900X requires a dedicated GPU. Primary use case: Ryzen 9 5900X targets Workstation. Direct competitor: Ryzen 9 5900X rivals Core i9-12900K; Ryzen 9 8945HX rivals Core Ultra 9 275HX.