Mobile Pentium 4 2.80 vs Sempron 3400+

Mobile Pentium 4 2.80 vs Sempron 3400+ Performance Spectrum

Mobile Pentium 4 2.80

1 / 2

428

0.0%

433

+1.2%

Ryzen Threadripper PRO 3955WX

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About PassMark

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.

Mobile Pentium 4 2.80 vs Sempron 3400+ 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.

Mobile Pentium 4 2.80 vs Sempron 3400+: Pros, Cons & Final Verdict

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

Mobile Pentium 4 2.80

2003

Why buy it

Trade-offs

❌Lower PassMark (428 vs 433).

Sempron 3400+

2005

Why buy it

✅+1.2% higher PassMark.
✅Draws 62W instead of 68W, a 6W reduction.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Quick Answers

So, is Sempron 3400+ better than Mobile Pentium 4 2.80?

It depends on what you want from the system. For gaming, Mobile Pentium 4 2.80 is ahead with a 0.2% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Sempron 3400+ pulls ahead with 1.2% better PassMark.

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

For streaming, content creation, and heavier multitasking, Sempron 3400+ is the stronger fit. You are getting 1.2% better PassMark, backed by 1 cores and 1 threads.

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

Sempron 3400+ still makes the most sense overall. Sempron 3400+ comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you 1.2% better PassMark.

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

Sempron 3400+ makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2005 vs 2003) and more multi-core headroom with 1 cores / 1 threads instead of 1/2. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Mobile Pentium 4 2.80 vs Sempron 3400+ Technical Specifications

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

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.

Sempron 3400+

The Sempron 3400+ is manufactured by AMD. It was released in 1 October 2005 (20 years ago). It is based on the Palermo (2001−2005) architecture. It features 1 cores and 1 threads. Max frequency: 2 GHz. L3 cache: 0 kB. L2 cache: 128 kB. Built on 90 nm process technology. Socket: 939. Thermal design power (TDP): 62 Watt. Memory support: DDR1. Passmark benchmark score: 433 points. Launch price was $30.

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Processing Power

The Mobile Pentium 4 2.80 packs 1 cores / 2 threads, matching the Sempron 3400+'s 1 cores. Boost clocks reach 2.8 GHz on the Mobile Pentium 4 2.80 versus 2 GHz on the Sempron 3400+ — a 33.3% clock advantage for the Mobile Pentium 4 2.80. The Mobile Pentium 4 2.80 uses the Northwood (2002−2004) architecture (130 nm), while the Sempron 3400+ uses Palermo (2001−2005) (90 nm). In PassMark, the Mobile Pentium 4 2.80 scores 428 against the Sempron 3400+'s 433 — a 1.2% lead for the Sempron 3400+. Both processors carry 0 kB of L3 cache.

Feature	Mobile Pentium 4 2.80	Sempron 3400+
Cores / Threads	1 / 2	1 / 1
Boost Clock	2.8 GHz+40%	2 GHz
L3 Cache	0 kB	0 kB
L2 Cache	512 kB+300%	128 kB
Process	130 nm	90 nm-31%
Architecture	Northwood (2002−2004)	Palermo (2001−2005)
PassMark	428	433+1%

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Memory & Platform

The Mobile Pentium 4 2.80 uses the PGA478 socket (PCIe 1.1), while the Sempron 3400+ uses 939 (PCIe 2.0) — making them incompatible on the same motherboard.