Core i5-12400F vs Mobile Pentium 4 2.66

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 Mobile Pentium 4 2.66 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 Mobile Pentium 4 2.66: 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: +1936.2% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 65W instead of 66W, a 1W reduction.
✅Newer platform on LGA1700 with DDR5 support instead of PGA478 and older memory support.
✅100+% more PCIe lanes (20 vs 0) for storage and expansion-heavy builds.
✅Includes a boxed cooler (Yes), unlike Mobile Pentium 4 2.66.

Trade-offs

❌Lower Geekbench multi-core (657 vs 800).
❌Launch MSRP is still $174 MSRP, while Mobile Pentium 4 2.66 mostly shows up through inconsistent older-market listings.

Mobile Pentium 4 2.66

2003

Why buy it

✅+21.8% higher Geekbench multi-core.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-12400F across 50 shared CPU benchmark tests.
❌Older platform position on PGA478, while Core i5-12400F moves to LGA1700 and DDR5.
❌No boxed cooler included, unlike Core i5-12400F.

Quick Answers

So, is Core i5-12400F better than Mobile Pentium 4 2.66?

It depends on what you want from the system. For gaming, Core i5-12400F is ahead with a 1936.2% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Mobile Pentium 4 2.66 pulls ahead with 21.8% better Geekbench multi-core.

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

For streaming, content creation, and heavier multitasking, Mobile Pentium 4 2.66 is the stronger fit. You are getting 21.8% better Geekbench multi-core, backed by 1 cores and 2 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 at an unclear MSRP at $174 MSRP versus unclear MSRP, and it still gives you a 1936.2% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Mobile Pentium 4 2.66 is still stronger for heavier multi-core work with 21.8% better Geekbench multi-core. It is also 100.0% better value on MSRP (112.3 vs 0.0 PassMark/$), 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 2003) and a healthier platform with LGA1700 and DDR5 instead of PGA478. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i5-12400F vs Mobile Pentium 4 2.66 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.

Mobile Pentium 4 2.66

The Mobile Pentium 4 2.66 is manufactured by Intel. It was released in Junho 2003 (22 years ago). It is based on the Northwood (2002−2004) architecture. It features 1 cores and 2 threads. Max frequency: 2.67 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 130 nm process technology. Socket: PGA478. Thermal design power (TDP): 66 Watt. Memory support: DDR1, DDR2. Passmark benchmark score: 395 points. Launch price was $69.

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Processing Power

The Core i5-12400F packs 6 cores / 12 threads, while the Mobile Pentium 4 2.66 offers 1 cores / 2 threads — the Core i5-12400F has 5 more cores. Boost clocks reach 4.4 GHz on the Core i5-12400F versus 2.67 GHz on the Mobile Pentium 4 2.66 — a 48.9% clock advantage for the Core i5-12400F. The Core i5-12400F uses the Alder Lake-S (2022) architecture (Intel 7 nm), while the Mobile Pentium 4 2.66 uses Northwood (2002−2004) (130 nm). In PassMark, the Core i5-12400F scores 19,532 against the Mobile Pentium 4 2.66's 395 — a 192.1% lead for the Core i5-12400F. Geekbench 6 single-core — the metric most relevant to gaming — records 1,700 vs 800, a 72% lead for the Core i5-12400F that directly translates to higher frame rates. Multi-core Geekbench: 657 vs 800 (19.6% advantage for the Mobile Pentium 4 2.66). L3 cache: 18 MB (total) on the Core i5-12400F vs 0 kB on the Mobile Pentium 4 2.66.

Feature	Core i5-12400F	Mobile Pentium 4 2.66
Cores / Threads	6 / 12+500%	1 / 2
Boost Clock	4.4 GHz+65%	2.67 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)	Northwood (2002−2004)
PassMark	19,532+4845%	395
Cinebench R23 Multi	12,380	—
Geekbench 6 Single	1,700+113%	800
Geekbench 6 Multi	657	800+22%

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Memory & Platform

The Core i5-12400F uses the LGA1700 socket (PCIe 3.0), while the Mobile Pentium 4 2.66 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800, DDR4-3200 on the Core i5-12400F versus DDR2 on the Mobile Pentium 4 2.66 — the Core i5-12400F supports 239900% 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 (Mobile Pentium 4 2.66). PCIe lanes: 20 (Core i5-12400F) vs 0 (Mobile Pentium 4 2.66) — 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 852PM,855PM (Mobile Pentium 4 2.66).

Feature	Core i5-12400F	Mobile Pentium 4 2.66
Socket	LGA1700	PGA478
PCIe Generation	PCIe 3.0+173%	PCIe 1.1
Max RAM Speed	DDR5-4800, DDR4-3200+239900%	DDR2
Max RAM Capacity	128 GB+3100%	4 GB
RAM Channels	2+100%	1
ECC Support	No	No
PCIe Lanes	20	0

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Advanced Features

Virtualization support: VT-x, VT-d, EPT (Core i5-12400F) vs None (Mobile Pentium 4 2.66). Primary use case: Core i5-12400F targets Gaming Performance/Value, Mobile Pentium 4 2.66 targets Legacy Laptop. Direct competitor: Core i5-12400F rivals Ryzen 5 5600.