Atom N550 vs Celeron 3955U

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 N550 vs Celeron 3955U 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 N550 vs Celeron 3955U: Pros, Cons & Final Verdict

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

Atom N550

2010

Why buy it

✅Draws 9W instead of 15W, a 6W reduction.

Trade-offs

❌Lower PassMark (1,435 vs 1,443).

Celeron 3955U

2015

Why buy it

✅100+% more PCIe lanes (12 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌66.7% higher power demand at 15W vs 9W.

Quick Answers

So, is Celeron 3955U better than Atom N550?

Yes. Celeron 3955U is the better all-around CPU here. It gives you a 2.3% average FPS lead across 50 shared CPU game tests in our data, 0.6% better PassMark, and the stronger long-term platform, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Celeron 3955U is the better pick. According to our tests, it delivers 2.3% 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, Celeron 3955U is the stronger fit. You are getting 0.6% better PassMark, backed by 2 cores and 2 threads.

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

Celeron 3955U still makes the most sense overall. Celeron 3955U comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 2.3% average FPS lead across 50 shared CPU game tests in our data.

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

Celeron 3955U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2015 vs 2010) and more multi-core headroom with 2 cores / 2 threads instead of 2/4. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Atom N550 vs Celeron 3955U Technical Specifications

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

Atom N550

The Atom N550 is manufactured by Intel. It was released in 23 August 2010 (15 years ago). It is based on the Pineview (2009−2011) architecture. It features 2 cores and 4 threads. Base frequency is 1.5 GHz, with boost up to 1.5 GHz. L3 cache: 0 kB. L2 cache: 512K (per core). Built on 45 nm process technology. Socket: FCBGA559. Thermal design power (TDP): 8.5 Watt. Memory support: DDR3. Passmark benchmark score: 1,435 points. Launch price was $86.

Celeron 3955U

The Celeron 3955U is manufactured by Intel. It was released in 15 August 2015 (10 years ago). It is based on the Skylake (2015−2016) architecture. It features 2 cores and 2 threads. Base frequency is 2 GHz, with boost up to 2 GHz. L3 cache: 2 MB. L2 cache: 512 kB. Built on 14 nm process technology. Socket: BGA1356. Thermal design power (TDP): 15 Watt. Memory support: DDR4-1866/2133, LPDDR3-1600/1866, DDR3L-1333/1600. Passmark benchmark score: 1,443 points. Launch price was $107.

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Processing Power

The Atom N550 packs 2 cores / 4 threads, matching the Celeron 3955U's 2 cores. Boost clocks reach 1.5 GHz on the Atom N550 versus 2 GHz on the Celeron 3955U — a 28.6% clock advantage for the Celeron 3955U (base: 1.5 GHz vs 2 GHz). The Atom N550 uses the Pineview (2009−2011) architecture (45 nm), while the Celeron 3955U uses Skylake (2015−2016) (14 nm). In PassMark, the Atom N550 scores 1,435 against the Celeron 3955U's 1,443 — a 0.6% lead for the Celeron 3955U. L3 cache: 0 kB on the Atom N550 vs 2 MB on the Celeron 3955U.

Feature	Atom N550	Celeron 3955U
Cores / Threads	2 / 4	2 / 2
Boost Clock	1.5 GHz	2 GHz+33%
Base Clock	1.5 GHz	2 GHz+33%
L3 Cache	0 kB	2 MB
L2 Cache	512K (per core)	512 kB
Process	45 nm	14 nm-69%
Architecture	Pineview (2009−2011)	Skylake (2015−2016)
PassMark	1,435	1,443
Geekbench 6 Single	—	431
Geekbench 6 Multi	—	741

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Memory & Platform

The Atom N550 uses the FCBGA559 socket (PCIe 2.0), while the Celeron 3955U uses BGA1356 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-667 on the Atom N550 versus DDR4-2133 on the Celeron 3955U — the Celeron 3955U supports 219.8% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron 3955U supports up to 32 GB of RAM compared to 2 GB — 1500% more capacity for professional workloads. Memory channels: 1 (Atom N550) vs 2 (Celeron 3955U). PCIe lanes: 0 (Atom N550) vs 12 (Celeron 3955U) — the Celeron 3955U offers 12 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Intel NM10 (Atom N550) and Sunrise Point-LP (Celeron 3955U).

Feature	Atom N550	Celeron 3955U
Socket	FCBGA559	BGA1356
PCIe Generation	PCIe 2.0	PCIe 3.0+50%
Max RAM Speed	DDR3-667	DDR4-2133+220%
Max RAM Capacity	2 GB	32 GB+1500%
RAM Channels	1	2+100%
ECC Support	No	No
PCIe Lanes	0	12

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Advanced Features

Virtualization: not specified (Atom N550) / VT-x, VT-d (Celeron 3955U). Both include integrated graphics — Intel GMA 3150 (Atom N550) and HD Graphics 510 (Celeron 3955U) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Celeron 3955U targets Budget. Direct competitor: Celeron 3955U rivals Pentium 3825U.