Celeron 420 vs Mobile Pentium 4 2.80

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 420 vs Mobile Pentium 4 2.80 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 420 vs Mobile Pentium 4 2.80: Pros, Cons & Final Verdict

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

Celeron 420

2007

Why buy it

✅Draws 35W instead of 68W, a 33W reduction.

Trade-offs

❌Lower PassMark (425 vs 428).
❌Launch MSRP is still $39 MSRP, while Mobile Pentium 4 2.80 mostly shows up through inconsistent older-market listings.

Mobile Pentium 4 2.80

2003

Why buy it

Trade-offs

❌94.3% higher power demand at 68W vs 35W.

Quick Answers

So, is Mobile Pentium 4 2.80 better than Celeron 420?

Yes. Mobile Pentium 4 2.80 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 and 0.7% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Mobile Pentium 4 2.80 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, Mobile Pentium 4 2.80 is the stronger fit. You are getting 0.7% better PassMark, backed by 1 cores and 2 threads.

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

Mobile Pentium 4 2.80 is still the much better call for a fresh build. Mobile Pentium 4 2.80 comes in at an unclear MSRP at unclear MSRP versus $39 MSRP, and it still gives you a 0.2% average FPS lead across 50 shared CPU game tests in our data. Celeron 420 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2007 platform. Even with 100.0% better value on paper (10.9 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on LGA775.

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

Celeron 420 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2007 vs 2003). That makes it the safer long-term bet.

Celeron 420 vs Mobile Pentium 4 2.80 Technical Specifications

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

Celeron 420

The Celeron 420 is manufactured by Intel. It was released in 3 June 2007 (18 years ago). It is based on the Conroe-L (2007−2008) architecture. It features 1 cores and 1 threads. Base frequency is 1.6 GHz, with boost up to 1.6 GHz. L3 cache: 0 kB. L2 cache: 512 kB (total). Built on 65 nm process technology. Socket: LGA775. Thermal design power (TDP): 35 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 425 points. Launch price was $23.

Mobile Pentium 4 2.80

The Mobile Pentium 4 2.80 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: 2.8 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 130 nm process technology. Socket: PGA478. Thermal design power (TDP): 68 Watt. Memory support: DDR1, DDR2. Passmark benchmark score: 428 points. Launch price was $69.

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Processing Power

The Celeron 420 packs 1 cores / 1 threads, matching the Mobile Pentium 4 2.80's 1 cores. Boost clocks reach 1.6 GHz on the Celeron 420 versus 2.8 GHz on the Mobile Pentium 4 2.80 — a 54.5% clock advantage for the Mobile Pentium 4 2.80. The Celeron 420 uses the Conroe-L (2007−2008) architecture (65 nm), while the Mobile Pentium 4 2.80 uses Northwood (2002−2004) (130 nm). In PassMark, the Celeron 420 scores 425 against the Mobile Pentium 4 2.80's 428 — a 0.7% lead for the Mobile Pentium 4 2.80. Both processors carry 0 kB of L3 cache.

Feature	Celeron 420	Mobile Pentium 4 2.80
Cores / Threads	1 / 1	1 / 2
Boost Clock	1.6 GHz	2.8 GHz+75%
Base Clock	1.6 GHz	—
L3 Cache	0 kB	0 kB
L2 Cache	512 kB (total)	512 kB
Process	65 nm-50%	130 nm
Architecture	Conroe-L (2007−2008)	Northwood (2002−2004)
PassMark	425	428

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Memory & Platform

The Celeron 420 uses the LGA775 socket (PCIe 1.1), while the Mobile Pentium 4 2.80 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard.

Feature	Celeron 420	Mobile Pentium 4 2.80
Socket	LGA775	PGA478
PCIe Generation	PCIe 1.1	PCIe 1.1
Max RAM Speed	DDR2-800	—
Max RAM Capacity	16 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	0	—

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Advanced Features

Virtualization: No (Celeron 420) / not specified (Mobile Pentium 4 2.80). Primary use case: Celeron 420 targets Budget. Direct competitor: Celeron 420 rivals Pentium 4 2.80.