Celeron U3400 vs Core i5-12400F

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 U3400 vs Core i5-12400F 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 U3400 vs Core i5-12400F: Pros, Cons & Final Verdict

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

Celeron U3400

2010

Why buy it

✅Costs $88 less on MSRP ($86 MSRP vs $174 MSRP).
✅Draws 18W instead of 65W, a 47W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-12400F across 50 shared CPU benchmark tests.
❌Lower PassMark (575 vs 19,532).
❌Smaller total L3 cache (2 MB vs 18 MB).
❌Lower PassMark per dollar, at 6.7 vs 112.3 PassMark/$ ($86 MSRP vs $174 MSRP).
❌Older platform position on BGA1288, while Core i5-12400F moves to LGA1700 and DDR5.

Core i5-12400F

2022

Why buy it

✅Better for gaming: +1386.3% higher average FPS across 50 shared CPU benchmark tests.
✅+800% larger total L3 cache (18 MB vs 2 MB).
✅Delivers 1578.9% more PassMark for each dollar spent, at 112.3 vs 6.7 PassMark/$ ($174 MSRP vs $86 MSRP).
✅Newer platform on LGA1700 with DDR5 support instead of BGA1288 and older memory support.
✅100+% more PCIe lanes (20 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌
102.3% HIGHER MSRP
$174 MSRPvs$86 MSRP
❌261.1% higher power demand at 65W vs 18W.

Quick Answers

So, is Core i5-12400F better than Celeron U3400?

Yes. Core i5-12400F is the better all-around CPU here. It gives you a 1386.3% average FPS lead across 50 shared CPU game tests in our data, 3296.9% 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, Core i5-12400F is the better pick. According to our tests, it delivers 1386.3% 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, Core i5-12400F is the stronger fit. You are getting 3296.9% better PassMark, backed by 6 cores and 12 threads. It also has the larger cache pool with 800% larger total L3 cache (18 MB vs 2 MB).

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

Core i5-12400F is the better buy right now. Core i5-12400F comes in 102.3% more expensive on MSRP at $174 MSRP versus $86 MSRP, and it still gives you a 1386.3% average FPS lead across 50 shared CPU game tests in our data. It is also 1578.9% better value on MSRP (112.3 vs 6.7 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Core i5-12400F makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2022 vs 2010), a healthier platform with LGA1700 and DDR5 instead of BGA1288, 800% larger total L3 cache (18 MB vs 2 MB), and more multi-core headroom with 6 cores / 12 threads instead of 2/2. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Celeron U3400 vs Core i5-12400F Technical Specifications

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

Celeron U3400

The Celeron U3400 is manufactured by Intel. It was released in 2007-01-01. It is based on the Westmere (2010−2011) architecture. It features 2 cores and 2 threads. Base frequency is 1.06 GHz, with boost up to 0.07 GHz. L3 cache: 2 MB. L2 cache: 512 kB. Built on 32 nm process technology. Socket: BGA1288. Thermal design power (TDP): 18 Watt. Memory support: DDR3-800. Passmark benchmark score: 575 points. Launch price was $69.

Core i5-12400F

The Core i5-12400F is manufactured by Intel. It was released in 4 January 2022 (3 years ago). It is based on the Alder Lake-S (2022) architecture. It features 6 cores and 12 threads. Base frequency is 2.5 GHz, with boost up to 4.4 GHz. L3 cache: 18 MB (total). L2 cache: 1.25 MB (per core). Built on Intel 7 nm process technology. Socket: LGA1700. Thermal design power (TDP): 65 Watt. Memory support: DDR5-4800, DDR4-3200. Passmark benchmark score: 19,532 points. Launch price was $180.

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Processing Power

The Celeron U3400 packs 2 cores / 2 threads, while the Core i5-12400F offers 6 cores / 12 threads — the Core i5-12400F has 4 more cores. Boost clocks reach 0.07 GHz on the Celeron U3400 versus 4.4 GHz on the Core i5-12400F — a 193.7% clock advantage for the Core i5-12400F (base: 1.06 GHz vs 2.5 GHz). The Celeron U3400 uses the Westmere (2010−2011) architecture (32 nm), while the Core i5-12400F uses Alder Lake-S (2022) (Intel 7 nm). In PassMark, the Celeron U3400 scores 575 against the Core i5-12400F's 19,532 — a 188.6% lead for the Core i5-12400F. L3 cache: 2 MB on the Celeron U3400 vs 18 MB (total) on the Core i5-12400F.

Feature	Celeron U3400	Core i5-12400F
Cores / Threads	2 / 2	6 / 12+200%
Boost Clock	0.07 GHz	4.4 GHz+6186%
Base Clock	1.06 GHz	2.5 GHz+136%
L3 Cache	2 MB	18 MB (total)+800%
L2 Cache	512 kB	1.25 MB (per core)+150%
Process	32 nm	Intel 7 nm-78%
Architecture	Westmere (2010−2011)	Alder Lake-S (2022)
PassMark	575	19,532+3297%
Cinebench R23 Multi	—	12,380
Geekbench 6 Single	—	1,700
Geekbench 6 Multi	—	657

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Memory & Platform

The Celeron U3400 uses the BGA1288 socket (PCIe 2.0), while the Core i5-12400F uses LGA1700 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Celeron U3400	Core i5-12400F
Socket	BGA1288	LGA1700
PCIe Generation	PCIe 2.0	PCIe 3.0+50%
Max RAM Speed	—	DDR5-4800, DDR4-3200
Max RAM Capacity	—	128 GB
RAM Channels	—	2
ECC Support	—	No
PCIe Lanes	—	20

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Advanced Features

Virtualization: not specified (Celeron U3400) / VT-x, VT-d, EPT (Core i5-12400F). Primary use case: Core i5-12400F targets Gaming Performance/Value. Direct competitor: Core i5-12400F rivals Ryzen 5 5600.

Feature	Celeron U3400	Core i5-12400F
Integrated GPU	—	No
Virtualization	—	VT-x, VT-d, EPT
Target Use	—	Gaming Performance/Value

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Value Analysis

At launch, the Celeron U3400 was priced at $86, while the Core i5-12400F came in at $174. On launch pricing ($86 vs $174), Celeron U3400 was $88 cheaper. In terms of value on MSRP (PassMark points per dollar), the Celeron U3400 delivers 6.7 pts/$ vs 112.3 pts/$ for the Core i5-12400F — making the Core i5-12400F the 177.5% better value option.

Feature	Celeron U3400	Core i5-12400F
MSRP	$86-51%	$174
Performance per Dollar	6.7	112.3+1576%
Release Date	2010	2022

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