Core i5-12400F vs Pentium III 1400S

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.

Core i5-12400F vs Pentium III 1400S 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.

Core i5-12400F vs Pentium III 1400S: Pros, Cons & Final Verdict

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

Core i5-12400F

2022

Why buy it

✅Better for gaming: +3293.7% higher average FPS across 50 shared CPU benchmark tests.
✅Costs $76 less on MSRP ($174 MSRP vs $250 MSRP).
✅Delivers 12208.4% more PassMark for each dollar spent, at 112.3 vs 0.9 PassMark/$ ($174 MSRP vs $250 MSRP).
✅Newer platform on LGA1700 with DDR5 support instead of PGA370 and older memory support.
✅100+% more PCIe lanes (20 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌103.1% higher power demand at 65W vs 32W.

Pentium III 1400S

2002

Why buy it

✅Draws 32W instead of 65W, a 33W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-12400F across 50 shared CPU benchmark tests.
❌Lower PassMark (228 vs 19,532).
❌Lower PassMark per dollar, at 0.9 vs 112.3 PassMark/$ ($250 MSRP vs $174 MSRP).
❌Older platform position on PGA370, while Core i5-12400F moves to LGA1700 and DDR5.

Quick Answers

So, is Core i5-12400F better than Pentium III 1400S?

Yes. Core i5-12400F is the better all-around CPU here. It gives you a 3293.7% average FPS lead across 50 shared CPU game tests in our data, 8466.7% 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 3293.7% 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 8466.7% better PassMark, backed by 6 cores and 12 threads.

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 $76 cheaper on MSRP at $174 MSRP versus $250 MSRP, and it still gives you a 3293.7% average FPS lead across 50 shared CPU game tests in our data. It is also 12208.4% better value on MSRP (112.3 vs 0.9 PassMark/$), 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 2002), a healthier platform with LGA1700 and DDR5 instead of PGA370, and more multi-core headroom with 6 cores / 12 threads instead of 1/1. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i5-12400F vs Pentium III 1400S Technical Specifications

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

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.

Pentium III 1400S

The Pentium III 1400S is manufactured by Intel. It was released in 2007-01-01. It is based on the Tualatin (2000−2002) architecture. It features 1 cores and 1 threads. Max frequency: 1.4 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 130 nm process technology. Socket: PGA370. Thermal design power (TDP): 32 Watt. Passmark benchmark score: 228 points. Launch price was $69.

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Processing Power

The Core i5-12400F packs 6 cores / 12 threads, while the Pentium III 1400S offers 1 cores / 1 threads — the Core i5-12400F has 5 more cores. Boost clocks reach 4.4 GHz on the Core i5-12400F versus 1.4 GHz on the Pentium III 1400S — a 103.4% clock advantage for the Core i5-12400F. The Core i5-12400F uses the Alder Lake-S (2022) architecture (Intel 7 nm), while the Pentium III 1400S uses Tualatin (2000−2002) (130 nm). In PassMark, the Core i5-12400F scores 19,532 against the Pentium III 1400S's 228 — a 195.4% lead for the Core i5-12400F. L3 cache: 18 MB (total) on the Core i5-12400F vs 0 kB on the Pentium III 1400S.

Feature	Core i5-12400F	Pentium III 1400S
Cores / Threads	6 / 12+500%	1 / 1
Boost Clock	4.4 GHz+214%	1.4 GHz
Base Clock	2.5 GHz	—
L3 Cache	18 MB (total)	0 kB
L2 Cache	1.25 MB (per core)+150%	512 kB
Process	Intel 7 nm-95%	130 nm
Architecture	Alder Lake-S (2022)	Tualatin (2000−2002)
PassMark	19,532+8467%	228
Cinebench R23 Multi	12,380	—
Geekbench 6 Single	1,700	—
Geekbench 6 Multi	657	—

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Memory & Platform

The Core i5-12400F uses the LGA1700 socket (PCIe 3.0), while the Pentium III 1400S uses PGA370 (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800, DDR4-3200 on the Core i5-12400F versus PC133 on the Pentium III 1400S — the Core i5-12400F supports 3509% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i5-12400F supports up to 128 GB of RAM compared to 4 GB — 3100% more capacity for professional workloads. Memory channels: 2 (Core i5-12400F) vs 1 (Pentium III 1400S). PCIe lanes: 20 (Core i5-12400F) vs 0 (Pentium III 1400S) — the Core i5-12400F offers 20 more lanes for additional GPUs or NVMe drives. Chipset compatibility: H610,B660,H670,Z690,B760,H770,Z790 (Core i5-12400F) and Intel 815,VIA Apollo Pro 133T (Pentium III 1400S).

Feature	Core i5-12400F	Pentium III 1400S
Socket	LGA1700	PGA370
PCIe Generation	PCIe 3.0+173%	PCIe 1.1
Max RAM Speed	DDR5-4800, DDR4-3200+3509%	PC133
Max RAM Capacity	128 GB+3100%	4 GB
RAM Channels	2+100%	1
ECC Support	No	Yes
PCIe Lanes	20	0

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Advanced Features

Virtualization support: VT-x, VT-d, EPT (Core i5-12400F) vs No (Pentium III 1400S). Primary use case: Core i5-12400F targets Gaming Performance/Value. Direct competitor: Core i5-12400F rivals Ryzen 5 5600.

Feature	Core i5-12400F	Pentium III 1400S
Integrated GPU	No	No
AVX-512	—	No
Virtualization	VT-x, VT-d, EPT	No
Target Use	Gaming Performance/Value	—

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Value Analysis

At launch, the Core i5-12400F was priced at $174, while the Pentium III 1400S came in at $250. On launch pricing ($174 vs $250), Core i5-12400F was $76 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i5-12400F delivers 112.3 pts/$ vs 0.9 pts/$ for the Pentium III 1400S — making the Core i5-12400F the 196.8% better value option.

Feature	Core i5-12400F	Pentium III 1400S
MSRP	$174-30%	$250
Performance per Dollar	112.3+12378%	0.9
Release Date	2022	2002

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