Atom x7405C vs Ryzen 9 5900X

Atom x7405C vs Ryzen 9 5900X Performance Spectrum

Atom x7405C

4 / 4

5,218

0.0%

38,955

+646.6%

Ryzen Threadripper 9960X

Ryzen Threadripper PRO 9975WX

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.

Atom x7405C vs Ryzen 9 5900X 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.

Atom x7405C vs Ryzen 9 5900X: Pros, Cons & Final Verdict

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

Atom x7405C

2024

Why buy it

✅Draws 12W instead of 105W, a 93W reduction.
✅Newer platform on FCBGA1264 with DDR5 support instead of AM4 and DDR4.
✅Integrated graphics onboard with Intel UHD Graphics, 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 PassMark (5,218 vs 38,955).
❌Smaller total L3 cache (6 MB vs 64 MB).

Ryzen 9 5900X

2020

Why buy it

✅Better for gaming: +221.1% higher average FPS across 50 shared CPU benchmark tests.
✅+966.7% larger total L3 cache (64 MB vs 6 MB).
✅166.7% more PCIe lanes (24 vs 9) for storage and expansion-heavy builds.

Trade-offs

❌Launch MSRP is still $549 MSRP, while Atom x7405C mostly shows up through inconsistent older-market listings.
❌775% higher power demand at 105W vs 12W.
❌Older platform position on AM4 with DDR4, while Atom x7405C moves to FCBGA1264 and DDR5.
❌No integrated graphics, while Atom x7405C can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Ryzen 9 5900X better than Atom x7405C?

Yes. Ryzen 9 5900X is the better all-around CPU here. It gives you a 221.1% average FPS lead across 50 shared CPU game tests in our data and 646.6% better 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 221.1% 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 646.6% better PassMark, backed by 12 cores and 24 threads. It also has the larger cache pool with 966.7% larger total L3 cache (64 MB vs 6 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 $549 MSRP versus unclear MSRP, and it still gives you a 221.1% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (71.0 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Atom x7405C makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2024 vs 2020) and a healthier platform with FCBGA1264 and DDR5 instead of AM4. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Atom x7405C vs Ryzen 9 5900X Technical Specifications

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

Atom x7405C

The Atom x7405C is manufactured by Intel. It was released in 8 April 2024 (1 year ago). It is based on the Amston Lake (2024−2025) architecture. It features 4 cores and 4 threads. Base frequency is 1.7 GHz, with boost up to 3.4 GHz. L3 cache: 6 MB (total). L2 cache: 2 MB (total). Built on 10 nm process technology. Socket: FCBGA1264. Thermal design power (TDP): 12 Watt. Memory support: DDR4, DDR5. Passmark benchmark score: 5,218 points. Launch price was $57.

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.

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Processing Power

The Atom x7405C packs 4 cores / 4 threads, while the Ryzen 9 5900X offers 12 cores / 24 threads — the Ryzen 9 5900X has 8 more cores. Boost clocks reach 3.4 GHz on the Atom x7405C versus 4.8 GHz on the Ryzen 9 5900X — a 34.1% clock advantage for the Ryzen 9 5900X (base: 1.7 GHz vs 3.7 GHz). The Atom x7405C uses the Amston Lake (2024−2025) architecture (10 nm), while the Ryzen 9 5900X uses Vermeer (Zen3) (2020−2022) (7 nm, 12 nm). In PassMark, the Atom x7405C scores 5,218 against the Ryzen 9 5900X's 38,955 — a 152.7% lead for the Ryzen 9 5900X. L3 cache: 6 MB (total) on the Atom x7405C vs 64 MB on the Ryzen 9 5900X.

Feature	Atom x7405C	Ryzen 9 5900X
Cores / Threads	4 / 4	12 / 24+200%
Boost Clock	3.4 GHz	4.8 GHz+41%
Base Clock	1.7 GHz	3.7 GHz+118%
L3 Cache	6 MB (total)	64 MB+967%
L2 Cache	2 MB (total)	512K (per core)+25500%
Process	10 nm	7 nm, 12 nm-30%
Architecture	Amston Lake (2024−2025)	Vermeer (Zen3) (2020−2022)
PassMark	5,218	38,955+647%
Cinebench R23 Multi	—	21,000
Geekbench 6 Single	—	2,174
Geekbench 6 Multi	—	11,888

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Memory & Platform

The Atom x7405C uses the FCBGA1264 socket (PCIe 4.0), while the Ryzen 9 5900X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800 on the Atom x7405C versus DDR4-3200 on the Ryzen 9 5900X — the Atom x7405C supports 50% 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 16 GB — 700% more capacity for professional workloads. Memory channels: 1 (Atom x7405C) vs 2 (Ryzen 9 5900X). PCIe lanes: 9 (Atom x7405C) vs 24 (Ryzen 9 5900X) — the Ryzen 9 5900X offers 15 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Intel BGA1264 (Atom x7405C) and A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X).

Feature	Atom x7405C	Ryzen 9 5900X
Socket	FCBGA1264	AM4
PCIe Generation	PCIe 4.0	PCIe 4.0
Max RAM Speed	DDR5-4800+50%	DDR4-3200
Max RAM Capacity	16 GB	128 GB+700%
RAM Channels	1	2+100%
ECC Support	No	Yes
PCIe Lanes	9	24+167%

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Advanced Features

Virtualization: not specified (Atom x7405C) / AMD-V (Ryzen 9 5900X). The Atom x7405C includes integrated graphics (Intel UHD Graphics), 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.