A8-4555M vs Celeron 3865U

A8-4555M vs Celeron 3865U Performance Spectrum

A8-4555M

4 / 4

1,341

0.0%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Celeron 3865U

2 / 2

1,343

+0.1%

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.

A8-4555M vs Celeron 3865U 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.

A8-4555M vs Celeron 3865U: Pros, Cons & Final Verdict

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

A8-4555M

2012

Why buy it

✅60% more PCIe lanes (16 vs 10) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (1,341 vs 1,343).
❌26.7% higher power demand at 19W vs 15W.

Celeron 3865U

2017

Why buy it

✅+0.1% higher PassMark.
✅Draws 15W instead of 19W, a 4W reduction.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Quick Answers

So, is Celeron 3865U better than A8-4555M?

It depends on what you want from the system. For gaming, A8-4555M is ahead with a 1.6% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Celeron 3865U pulls ahead with 0.1% better PassMark.

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

For streaming, content creation, and heavier multitasking, Celeron 3865U is the stronger fit. You are getting 0.1% better PassMark, backed by 2 cores and 2 threads.

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

Celeron 3865U still makes the most sense overall. Celeron 3865U comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you 0.1% better PassMark.

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

Celeron 3865U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2017 vs 2012) and more multi-core headroom with 2 cores / 2 threads instead of 4/4. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

A8-4555M vs Celeron 3865U Technical Specifications

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

A8-4555M

The A8-4555M is manufactured by AMD. It was released in 2014-01-01. It is based on the Trinity (2012−2013) architecture. It features 4 cores and 4 threads. Base frequency is 1.6 GHz, with boost up to 2.4 GHz. L3 cache: 0 kB. L2 cache: 4 MB (total). Built on 32 nm process technology. Socket: FP2. Thermal design power (TDP): 19 Watt. Memory support: unknown Dual-channel. Passmark benchmark score: 1,341 points. Launch price was $90.

Celeron 3865U

The Celeron 3865U is manufactured by Intel. It was released in 3 January 2017 (8 years ago). It is based on the Kaby Lake-U (2017) architecture. It features 2 cores and 2 threads. Base frequency is 1.8 GHz, with boost up to 1.8 GHz. L3 cache: 2 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: BGA1356. Thermal design power (TDP): 15 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 1,343 points. Launch price was $107.

⚡

Processing Power

The A8-4555M packs 4 cores / 4 threads, while the Celeron 3865U offers 2 cores / 2 threads — the A8-4555M has 2 more cores. Boost clocks reach 2.4 GHz on the A8-4555M versus 1.8 GHz on the Celeron 3865U — a 28.6% clock advantage for the A8-4555M (base: 1.6 GHz vs 1.8 GHz). The A8-4555M uses the Trinity (2012−2013) architecture (32 nm), while the Celeron 3865U uses Kaby Lake-U (2017) (14 nm). In PassMark, the A8-4555M scores 1,341 against the Celeron 3865U's 1,343 — a 0.1% lead for the Celeron 3865U. L3 cache: 0 kB on the A8-4555M vs 2 MB (total) on the Celeron 3865U.

Feature	A8-4555M	Celeron 3865U
Cores / Threads	4 / 4+100%	2 / 2
Boost Clock	2.4 GHz+33%	1.8 GHz
Base Clock	1.6 GHz	1.8 GHz+12%
L3 Cache	0 kB	2 MB (total)
L2 Cache	4 MB (total)	256K (per core)+6300%
Process	32 nm	14 nm-56%
Architecture	Trinity (2012−2013)	Kaby Lake-U (2017)
PassMark	1,341	1,343
Geekbench 6 Single	—	389
Geekbench 6 Multi	—	674

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Memory & Platform

The A8-4555M uses the FP2 socket (PCIe 2.0), while the Celeron 3865U uses BGA1356 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 1333 on the A8-4555M versus DDR4-2133 / LPDDR3-1866 on the Celeron 3865U — the Celeron 3865U supports 60% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron 3865U supports up to 32 GB of RAM compared to 16 GB — 100% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (A8-4555M) vs 10 (Celeron 3865U) — the A8-4555M offers 6 more lanes for additional GPUs or NVMe drives. Chipset compatibility: FP2 (A8-4555M) and 100-series,200-series (Celeron 3865U).

Feature	A8-4555M	Celeron 3865U
Socket	FP2	BGA1356
PCIe Generation	PCIe 2.0	PCIe 3.0+50%
Max RAM Speed	1333	DDR4-2133 / LPDDR3-1866+60%
Max RAM Capacity	16 GB	32 GB+100%
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	16+60%	10

🔧

Advanced Features

Neither processor supports overclocking. Virtualization support: true (A8-4555M) vs VT-x / VT-d / EPT (Celeron 3865U). Both include integrated graphics — Radeon HD 7600G (A8-4555M) and Intel HD Graphics 610 (Celeron 3865U) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Celeron 3865U targets Entry-level. Direct competitor: A8-4555M rivals Core i3-2367M; Celeron 3865U rivals Pentium Gold 4415U.