Celeron 3955U vs Celeron N4000C

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.

Celeron 3955U vs Celeron N4000C 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.

Celeron 3955U vs Celeron N4000C: Pros, Cons & Final Verdict

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

Celeron 3955U

2015

Why buy it

✅+0.9% higher PassMark.
✅100+% more PCIe lanes (12 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with HD Graphics 510, while Celeron N4000C needs a discrete GPU.

Trade-offs

❌Smaller total L3 cache (2 MB vs 4 MB).
❌150% higher power demand at 15W vs 6W.

Celeron N4000C

2019

Why buy it

✅+100% larger total L3 cache (4 MB vs 2 MB).
✅Draws 6W instead of 15W, a 9W reduction.

Trade-offs

❌Lower PassMark (1,430 vs 1,443).
❌No integrated graphics, while Celeron 3955U can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Celeron N4000C better than Celeron 3955U?

It depends on what you want from the system. For gaming, Celeron N4000C is ahead with a 0.1% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Celeron 3955U pulls ahead with 0.9% better PassMark. Celeron N4000C also has the bigger cache pool with 100% larger total L3 cache (4 MB vs 2 MB).

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 0.9% better PassMark, backed by 2 cores and 2 threads.

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

Celeron N4000C still makes the most sense overall. Celeron N4000C comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 0.1% average FPS lead across 50 shared CPU game tests in our data.

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

Celeron N4000C makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2019 vs 2015) and 100% larger total L3 cache (4 MB vs 2 MB). That makes it the safer long-term bet.

Celeron 3955U vs Celeron N4000C Technical Specifications

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

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.

Celeron N4000C

The Celeron N4000C is manufactured by Intel. It was released in 2007-01-01. It features 2 cores and 2 threads. Base frequency is 1.1 GHz, with boost up to 2.6 GHz. L3 cache: 4 MB. Built on 14 nm process technology. Socket: FCBGA1090. Thermal design power (TDP): 6 Watt. Memory support: DDR4/LPDDR4 up to 2400 MT/s. Passmark benchmark score: 1,430 points. Launch price was $69.

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Processing Power

Both the Celeron 3955U and Celeron N4000C share an identical 2-core/2-thread configuration. Boost clocks reach 2 GHz on the Celeron 3955U versus 2.6 GHz on the Celeron N4000C — a 26.1% clock advantage for the Celeron N4000C (base: 2 GHz vs 1.1 GHz). The Celeron 3955U is built on the Skylake (2015−2016) architecture. In PassMark, the Celeron 3955U scores 1,443 against the Celeron N4000C's 1,430 — a 0.9% lead for the Celeron 3955U. L3 cache: 2 MB on the Celeron 3955U vs 4 MB on the Celeron N4000C.

Feature	Celeron 3955U	Celeron N4000C
Cores / Threads	2 / 2	2 / 2
Boost Clock	2 GHz	2.6 GHz+30%
Base Clock	2 GHz+82%	1.1 GHz
L3 Cache	2 MB	4 MB+100%
L2 Cache	512 kB	—
Process	14 nm	14 nm
Architecture	Skylake (2015−2016)	—
PassMark	1,443	1,430
Geekbench 6 Single	431	—
Geekbench 6 Multi	741	—

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Memory & Platform

The Celeron 3955U uses the BGA1356 socket (PCIe 3.0), while the Celeron N4000C uses FCBGA1090 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Celeron 3955U	Celeron N4000C
Socket	BGA1356	FCBGA1090
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR4-2133	—
Max RAM Capacity	32 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	12	—

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Advanced Features

Virtualization: VT-x, VT-d (Celeron 3955U) / not specified (Celeron N4000C). The Celeron 3955U includes integrated graphics (HD Graphics 510), while the Celeron N4000C requires a dedicated GPU. Primary use case: Celeron 3955U targets Budget. Direct competitor: Celeron 3955U rivals Pentium 3825U.