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 540 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.

Celeron 540 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.

Celeron 540

2007

Why buy it

✅Draws 30W instead of 66W, a 36W reduction.

Trade-offs

❌Launch MSRP is still $86 MSRP, while Mobile Pentium 4 2.66 mostly shows up through inconsistent older-market listings.

Mobile Pentium 4 2.66

2003

Why buy it

Trade-offs

❌Lower PassMark (395 vs 408).
❌120% higher power demand at 66W vs 30W.

Quick Answers

So, is Celeron 540 better than Mobile Pentium 4 2.66?

Yes. Celeron 540 is the better all-around CPU here. It gives you a 0.2% average FPS lead across 50 shared CPU game tests in our data, 3.3% 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, Celeron 540 is the better pick. According to our tests, it delivers 0.2% 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 540 is the stronger fit. You are getting 3.3% better PassMark.

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

Celeron 540 is the better buy right now. Celeron 540 comes in at an unclear MSRP at $86 MSRP versus unclear MSRP, and it still gives you a 0.2% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (4.7 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Celeron 540 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2007 vs 2003). That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Celeron 540 vs Mobile Pentium 4 2.66 Technical Specifications

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

Celeron 540

The Celeron 540 is manufactured by Intel. It was released in 2007-01-01. Base frequency: 1.86 GHz. L3 cache: 1 MB L2 Cache. Built on 65 nm process technology. Socket: PGA478. Thermal design power (TDP): 30 Watt. Passmark benchmark score: 408 points. Launch price was $69.

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 Mobile Pentium 4 2.66 is built on the Northwood (2002−2004) architecture. In PassMark, the Celeron 540 scores 408 against the Mobile Pentium 4 2.66's 395 — a 3.2% lead for the Celeron 540. L3 cache: 1 MB L2 Cache on the Celeron 540 vs 0 kB on the Mobile Pentium 4 2.66.

Feature	Celeron 540	Mobile Pentium 4 2.66
Cores / Threads	—	1 / 2
Boost Clock	—	2.67 GHz
Base Clock	1.86 GHz	—
L3 Cache	1 MB L2 Cache	0 kB
L2 Cache	—	512 kB
Process	65 nm-50%	130 nm
Architecture	—	Northwood (2002−2004)
PassMark	408+3%	395
Geekbench 6 Single	—	800
Geekbench 6 Multi	—	800

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Memory & Platform

Both processors use the PGA478 socket with PCIe 1.1. Maximum memory speed reaches DDR2-667 on the Celeron 540 versus DDR2 on the Mobile Pentium 4 2.66 — the Celeron 540 supports 33250% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 4 GB of RAM. Memory channels: 2 (Celeron 540) vs 1 (Mobile Pentium 4 2.66). Both provide 0 PCIe lanes. Chipset compatibility: Santa Rosa (Celeron 540) and 852PM,855PM (Mobile Pentium 4 2.66).

Feature	Celeron 540	Mobile Pentium 4 2.66
Socket	PGA478	PGA478
PCIe Generation	PCIe 1.1	PCIe 1.1
Max RAM Speed	DDR2-667+33250%	DDR2
Max RAM Capacity	4 GB	4 GB
RAM Channels	2+100%	1
ECC Support	No	No
PCIe Lanes	0	0

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Advanced Features

Neither processor supports overclocking. Virtualization support: No (Celeron 540) vs None (Mobile Pentium 4 2.66). Primary use case: Celeron 540 targets Budget, Mobile Pentium 4 2.66 targets Legacy Laptop. Direct competitor: Celeron 540 rivals Pentium T2310.