Ryzen 9 5900X vs Ryzen 9 8945H

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 8945H 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 8945H: 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.
✅+300% larger total L3 cache (64 MB vs 16 MB).
✅20% more PCIe lanes (24 vs 20) for storage and expansion-heavy builds.

Trade-offs

❌Launch MSRP is still $549 MSRP, while Ryzen 9 8945H mostly shows up through inconsistent older-market listings.
❌1212.5% higher power demand at 105W vs 8W.
❌Older platform position on AM4 with DDR4, while Ryzen 9 8945H moves to FP7/FP7r2/FP8 and DDR5.
❌No integrated graphics, while Ryzen 9 8945H can still boot and troubleshoot without a discrete GPU.

Ryzen 9 8945H

2023

Why buy it

✅Draws 8W instead of 105W, a 97W reduction.
✅Newer platform on FP7/FP7r2/FP8 with DDR5 support instead of AM4 and DDR4.
✅Integrated graphics onboard with Radeon 780M, 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.
❌Lower Cinebench R23 multi-core (17,500 vs 21,000).
❌Smaller total L3 cache (16 MB vs 64 MB).

Quick Answers

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

Yes. Ryzen 9 5900X is the better all-around CPU here. It gives you a 9.0% average FPS lead across 50 shared CPU game tests in our data, 20% better Cinebench R23 multi-core, and 28.8% higher PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Ryzen 9 5900X is the better pick. According to our tests, it delivers 9.0% 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 5900X is the stronger fit. You are getting 20% better Cinebench R23 multi-core, backed by 12 cores and 24 threads. It also has the larger cache pool with 300% larger total L3 cache (64 MB vs 16 MB).

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

Ryzen 9 5900X is the better buy right now. Ryzen 9 5900X comes in at an unclear MSRP at $549 MSRP versus unclear MSRP, and it still gives you a 9.0% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (71.0 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Ryzen 9 8945H makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2020) and a healthier platform with FP7/FP7r2/FP8 and DDR5 instead of AM4. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Ryzen 9 5900X vs Ryzen 9 8945H 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 8945H

The Ryzen 9 8945H is manufactured by AMD. It was released in 6 December 2023 (1 year ago). It is based on the Hawk Point-HS (Zen 4) (2023−2024) architecture. It features 8 cores and 16 threads. Base frequency is 4 GHz, with boost up to 5.2 GHz. L3 cache: 16 MB. L2 cache: 8 MB. Built on 4 nm process technology. Socket: FP7/FP7r2/FP8. Thermal design power (TDP): 8 MB + 16 MB. Memory support: DDR5. Passmark benchmark score: 30,240 points. Launch price was $499.

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Processing Power

The Ryzen 9 5900X packs 12 cores / 24 threads, while the Ryzen 9 8945H offers 8 cores / 16 threads — the Ryzen 9 5900X has 4 more cores. Boost clocks reach 4.8 GHz on the Ryzen 9 5900X versus 5.2 GHz on the Ryzen 9 8945H — a 8% clock advantage for the Ryzen 9 8945H (base: 3.7 GHz vs 4 GHz). The Ryzen 9 5900X uses the Vermeer (Zen3) (2020−2022) architecture (7 nm, 12 nm), while the Ryzen 9 8945H uses Hawk Point-HS (Zen 4) (2023−2024) (4 nm). In PassMark, the Ryzen 9 5900X scores 38,955 against the Ryzen 9 8945H's 30,240 — a 25.2% lead for the Ryzen 9 5900X. Cinebench R23 multi-core: 21,000 vs 17,500 (18.2% advantage for the Ryzen 9 5900X). Geekbench 6 single-core — the metric most relevant to gaming — records 2,174 vs 2,617, a 18.5% lead for the Ryzen 9 8945H that directly translates to higher frame rates. Multi-core Geekbench: 11,888 vs 12,662 (6.3% advantage for the Ryzen 9 8945H). L3 cache: 64 MB on the Ryzen 9 5900X vs 16 MB on the Ryzen 9 8945H.

Feature	Ryzen 9 5900X	Ryzen 9 8945H
Cores / Threads	12 / 24+50%	8 / 16
Boost Clock	4.8 GHz	5.2 GHz+8%
Base Clock	3.7 GHz	4 GHz+8%
L3 Cache	64 MB+300%	16 MB
L2 Cache	512K (per core)+6300%	8 MB
Process	7 nm, 12 nm	4 nm-43%
Architecture	Vermeer (Zen3) (2020−2022)	Hawk Point-HS (Zen 4) (2023−2024)
PassMark	38,955+29%	30,240
Cinebench R23 Multi	21,000+20%	17,500
Geekbench 6 Single	2,174	2,617+20%
Geekbench 6 Multi	11,888	12,662+7%

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Memory & Platform

The Ryzen 9 5900X uses the AM4 socket (PCIe 4.0), while the Ryzen 9 8945H uses FP7/FP7r2/FP8 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-3200 on the Ryzen 9 5900X versus DDR5-5600 on the Ryzen 9 8945H — the Ryzen 9 8945H supports 75% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 9 8945H supports up to 256 GB of RAM compared to 128 GB — 100% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 24 (Ryzen 9 5900X) vs 20 (Ryzen 9 8945H) — the Ryzen 9 5900X offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X) and FP7,FP7r2,FP8 (Ryzen 9 8945H).

Feature	Ryzen 9 5900X	Ryzen 9 8945H
Socket	AM4	FP7/FP7r2/FP8
PCIe Generation	PCIe 4.0	PCIe 4.0
Max RAM Speed	DDR4-3200	DDR5-5600+75%
Max RAM Capacity	128 GB	256 GB+100%
RAM Channels	2	2
ECC Support	Yes	No
PCIe Lanes	24+20%	20

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Advanced Features

Only the Ryzen 9 5900X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the Ryzen 9 8945H supports AVX-512 instructions — important for machine learning and scientific applications. Both support AMD-V virtualization. The Ryzen 9 8945H includes integrated graphics (Radeon 780M), while the Ryzen 9 5900X requires a dedicated GPU. Primary use case: Ryzen 9 5900X targets Workstation, Ryzen 9 8945H targets Gaming. Direct competitor: Ryzen 9 5900X rivals Core i9-12900K; Ryzen 9 8945H rivals Core i9-13900H.