Athlon X2 340 vs Celeron 3865U

Athlon X2 340 vs Celeron 3865U Performance Spectrum

Athlon X2 340

2 / 2

1,333

0.0%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Celeron 3865U

2 / 2

1,343

+0.8%

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.

Athlon X2 340 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.

Athlon X2 340 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.

Athlon X2 340

2012

Why buy it

✅+2.1% higher Geekbench single-core performance for gaming and desktop responsiveness.
✅60% more PCIe lanes (16 vs 10) for storage and expansion-heavy builds.
✅Includes a boxed cooler (AMD Stock), unlike Celeron 3865U.

Trade-offs

❌Lower Geekbench multi-core (549 vs 674).
❌Launch MSRP is still $30 MSRP, while Celeron 3865U mostly shows up through inconsistent older-market listings.
❌333.3% higher power demand at 65W vs 15W.
❌No integrated graphics, while Celeron 3865U can still boot and troubleshoot without a discrete GPU.

Celeron 3865U

2017

Why buy it

✅+22.8% higher Geekbench multi-core.
✅Draws 15W instead of 65W, a 50W reduction.
✅Integrated graphics onboard with Intel HD Graphics 610, while Athlon X2 340 needs a discrete GPU.

Trade-offs

❌Lower Geekbench single-core performance for gaming (389 vs 397).
❌No boxed cooler included, unlike Athlon X2 340.

Quick Answers

So, is Celeron 3865U better than Athlon X2 340?

It depends on what you want from the system. For gaming, Athlon X2 340 is ahead with a 0.4% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Celeron 3865U pulls ahead with 22.8% better Geekbench multi-core.

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 22.8% better Geekbench multi-core, backed by 2 cores and 2 threads.

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

Celeron 3865U is still the much better call for a fresh build. Celeron 3865U comes in at an unclear MSRP at unclear MSRP versus $30 MSRP, and it still gives you 22.8% better Geekbench multi-core. Athlon X2 340 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2012 platform. Even with 100.0% better value on paper (44.4 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on FM2.

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 2/2. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Athlon X2 340 vs Celeron 3865U Technical Specifications

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

Athlon X2 340

The Athlon X2 340 is manufactured by AMD. It was released in 2009-01-01. It is based on the Trinity (2012−2013) architecture. It features 2 cores and 2 threads. Base frequency is 3.2 GHz, with boost up to 3.6 GHz. L2 cache: 1 MB (total). Built on 32 nm process technology. Socket: FM2. Thermal design power (TDP): 65 Watt. Memory support: DDR3-1600. Passmark benchmark score: 1,333 points. Launch price was $149.

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.

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Processing Power

Both the Athlon X2 340 and Celeron 3865U share an identical 2-core/2-thread configuration. Boost clocks reach 3.6 GHz on the Athlon X2 340 versus 1.8 GHz on the Celeron 3865U — a 66.7% clock advantage for the Athlon X2 340 (base: 3.2 GHz vs 1.8 GHz). The Athlon X2 340 uses the Trinity (2012−2013) architecture (32 nm), while the Celeron 3865U uses Kaby Lake-U (2017) (14 nm). In PassMark, the Athlon X2 340 scores 1,333 against the Celeron 3865U's 1,343 — a 0.7% lead for the Celeron 3865U. Geekbench 6 single-core — the metric most relevant to gaming — records 397 vs 389, a 2% lead for the Athlon X2 340 that directly translates to higher frame rates. Multi-core Geekbench: 549 vs 674 (20.4% advantage for the Celeron 3865U).

Feature	Athlon X2 340	Celeron 3865U
Cores / Threads	2 / 2	2 / 2
Boost Clock	3.6 GHz+100%	1.8 GHz
Base Clock	3.2 GHz+78%	1.8 GHz
L3 Cache	—	2 MB (total)
L2 Cache	1 MB (total)	256K (per core)+25500%
Process	32 nm	14 nm-56%
Architecture	Trinity (2012−2013)	Kaby Lake-U (2017)
PassMark	1,333	1,343
Geekbench 6 Single	397+2%	389
Geekbench 6 Multi	549	674+23%

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Memory & Platform

The Athlon X2 340 uses the FM2 socket (PCIe 2.0), while the Celeron 3865U uses BGA1356 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1600 on the Athlon X2 340 versus DDR4-2133 / LPDDR3-1866 on the Celeron 3865U — the Celeron 3865U supports 33.3% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 32 GB of RAM. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Athlon X2 340) vs 10 (Celeron 3865U) — the Athlon X2 340 offers 6 more lanes for additional GPUs or NVMe drives. Chipset compatibility: A55,A75,A85X,A88X (Athlon X2 340) and 100-series,200-series (Celeron 3865U).

Feature	Athlon X2 340	Celeron 3865U
Socket	FM2	BGA1356
PCIe Generation	PCIe 2.0	PCIe 3.0+50%
Max RAM Speed	DDR3-1600	DDR4-2133 / LPDDR3-1866+33%
Max RAM Capacity	32 GB	32 GB
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	16+60%	10

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Advanced Features

Neither processor supports overclocking. Virtualization support: AMD-V (Athlon X2 340) vs VT-x / VT-d / EPT (Celeron 3865U). The Celeron 3865U includes integrated graphics (Intel HD Graphics 610), while the Athlon X2 340 requires a dedicated GPU. Primary use case: Athlon X2 340 targets Desktop, Celeron 3865U targets Entry-level. Direct competitor: Celeron 3865U rivals Pentium Gold 4415U.