Celeron 3865U vs Celeron 4205U

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 3865U vs Celeron 4205U 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 3865U vs Celeron 4205U: Pros, Cons & Final Verdict

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

Celeron 3865U

2017

Why buy it

✅+12.1% higher Geekbench single-core performance for gaming and desktop responsiveness.

Trade-offs

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

Celeron 4205U

2019

Why buy it

Trade-offs

❌Lower Geekbench single-core performance for gaming (347 vs 389).
❌Lower Geekbench multi-core (585 vs 674).

Quick Answers

So, is Celeron 3865U better than Celeron 4205U?

Yes. Celeron 3865U is the better all-around CPU here. It gives you a 0.5% average FPS lead across 50 shared CPU game tests in our data and 15.2% better Geekbench multi-core, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Celeron 3865U is the better pick. According to our tests, it delivers 0.5% 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 3865U is the stronger fit. You are getting 15.2% 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 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 a 0.5% average FPS lead across 50 shared CPU game tests in our data.

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

Celeron 4205U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2019 vs 2017). That makes it the safer long-term bet.

Celeron 3865U vs Celeron 4205U Technical Specifications

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

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.

Celeron 4205U

The Celeron 4205U is manufactured by Intel. It was released in 23 January 2019 (6 years ago). It is based on the Whiskey Lake-U (2018−2019) 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: 256 kB (per core). Built on 14 nm process technology. Socket: FCBGA1528. Thermal design power (TDP): 15 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 1,350 points. Launch price was $107.

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Processing Power

Both the Celeron 3865U and Celeron 4205U share an identical 2-core/2-thread configuration. Boost clocks reach 1.8 GHz on the Celeron 3865U versus 1.8 GHz on the Celeron 4205U — identical boost frequencies (base: 1.8 GHz vs 1.8 GHz). The Celeron 3865U uses the Kaby Lake-U (2017) architecture (14 nm), while the Celeron 4205U uses Whiskey Lake-U (2018−2019) (14 nm). In PassMark, the Celeron 3865U scores 1,343 against the Celeron 4205U's 1,350 — a 0.5% lead for the Celeron 4205U. Geekbench 6 single-core — the metric most relevant to gaming — records 389 vs 347, a 11.4% lead for the Celeron 3865U that directly translates to higher frame rates. Multi-core Geekbench: 674 vs 585 (14.1% advantage for the Celeron 3865U). Both processors carry 2 MB (total) of L3 cache.

Feature	Celeron 3865U	Celeron 4205U
Cores / Threads	2 / 2	2 / 2
Boost Clock	1.8 GHz	1.8 GHz
Base Clock	1.8 GHz	1.8 GHz
L3 Cache	2 MB (total)	2 MB (total)
L2 Cache	256K (per core)	256 kB (per core)
Process	14 nm	14 nm
Architecture	Kaby Lake-U (2017)	Whiskey Lake-U (2018−2019)
PassMark	1,343	1,350
Geekbench 6 Single	389+12%	347
Geekbench 6 Multi	674+15%	585

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Memory & Platform

The Celeron 3865U uses the BGA1356 socket (PCIe 3.0), while the Celeron 4205U uses FCBGA1528 (PCIe 3.0) — making them incompatible on the same motherboard. Both support up to DDR4-2133 / LPDDR3-1866 memory speed. The Celeron 4205U supports up to 64 GB of RAM compared to 32 GB — 100% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 10 (Celeron 3865U) vs 12 (Celeron 4205U) — the Celeron 4205U offers 2 more lanes for additional GPUs or NVMe drives. Chipset compatibility: 100-series,200-series (Celeron 3865U) and Whiskey Lake-U (Celeron 4205U).

Feature	Celeron 3865U	Celeron 4205U
Socket	BGA1356	FCBGA1528
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR4-2133 / LPDDR3-1866	DDR4-2133
Max RAM Capacity	32 GB	64 GB+100%
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	10	12+20%

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Advanced Features

Neither processor supports overclocking. Virtualization support: VT-x / VT-d / EPT (Celeron 3865U) vs VT-x, VT-d (Celeron 4205U). Both include integrated graphics — Intel HD Graphics 610 (Celeron 3865U) and UHD Graphics 610 (Celeron 4205U) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Celeron 3865U targets Entry-level, Celeron 4205U targets Budget. Direct competitor: Celeron 3865U rivals Pentium Gold 4415U; Celeron 4205U rivals Pentium Gold 4417U.

Feature	Celeron 3865U	Celeron 4205U
Integrated GPU	Yes	Yes
IGPU Model	Intel HD Graphics 610	UHD Graphics 610
Unlocked	No	No
AVX-512	No	No
Virtualization	VT-x / VT-d / EPT	VT-x, VT-d
Target Use	Entry-level	Budget