Athlon XP 2500+ vs Mobile Sempron SI-42

Athlon XP 2500+ vs Mobile Sempron SI-42 Performance Spectrum

Athlon XP 2500+

1 / 1

320

0.0%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Ryzen Threadripper 7970X

Mobile Sempron SI-42

1 / 1

332

+3.8%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Ryzen Threadripper 7970X

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.

Athlon XP 2500+ vs Mobile Sempron SI-42 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.

Athlon XP 2500+ vs Mobile Sempron SI-42: Pros, Cons & Final Verdict

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

Athlon XP 2500+

2003

Why buy it

✅Draws 68W instead of 512W, a 444W reduction.
✅Includes a boxed cooler (Yes), unlike Mobile Sempron SI-42.

Trade-offs

❌Lower PassMark (320 vs 332).
❌Launch MSRP is still $172 MSRP, while Mobile Sempron SI-42 mostly shows up through inconsistent older-market listings.

Mobile Sempron SI-42

2009

Why buy it

Trade-offs

❌652.9% higher power demand at 512W vs 68W.
❌No boxed cooler included, unlike Athlon XP 2500+.

Quick Answers

So, is Mobile Sempron SI-42 better than Athlon XP 2500+?

Yes. Mobile Sempron SI-42 is the better all-around CPU here. It gives you 3.8% 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, Mobile Sempron SI-42 has the edge because it leads the single-thread side of this matchup with 14.8% higher max boost clock.

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

For streaming, content creation, and heavier multitasking, Mobile Sempron SI-42 is the stronger fit. You are getting 3.8% better PassMark, backed by 1 cores and 1 threads.

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

Mobile Sempron SI-42 is still the much better call for a fresh build. Mobile Sempron SI-42 comes in at an unclear MSRP at unclear MSRP versus $172 MSRP, and it still gives you 3.8% higher PassMark. Athlon XP 2500+ only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2003 platform. Even with 100.0% better value on paper (1.9 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on A.

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

Mobile Sempron SI-42 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2009 vs 2003) and more multi-core headroom with 1 cores / 1 threads instead of 1/1. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Athlon XP 2500+ vs Mobile Sempron SI-42 Technical Specifications

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

Athlon XP 2500+

The Athlon XP 2500+ is manufactured by AMD. It was released in 2009-01-01. It is based on the Barton (2001−2004) architecture. It features 1 cores and 1 threads. Max frequency: 1.83 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 130 nm process technology. Socket: A. Thermal design power (TDP): 68 Watt. Passmark benchmark score: 320 points. Launch price was $149.

Mobile Sempron SI-42

The Mobile Sempron SI-42 is manufactured by AMD. It was released in 1 September 2009 (16 years ago). It is based on the Sable (2008−2009) architecture. It features 1 cores and 1 threads. Max frequency: 2.1 GHz. L2 cache: 512 kB. Built on 65 nm process technology. Socket: S1g2. Thermal design power (TDP): 512 kB. Passmark benchmark score: 332 points. Launch price was $69.

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Processing Power

Both the Athlon XP 2500+ and Mobile Sempron SI-42 share an identical 1-core/1-thread configuration. Boost clocks reach 1.83 GHz on the Athlon XP 2500+ versus 2.1 GHz on the Mobile Sempron SI-42 — a 13.7% clock advantage for the Mobile Sempron SI-42. The Athlon XP 2500+ uses the Barton (2001−2004) architecture (130 nm), while the Mobile Sempron SI-42 uses Sable (2008−2009) (65 nm). In PassMark, the Athlon XP 2500+ scores 320 against the Mobile Sempron SI-42's 332 — a 3.7% lead for the Mobile Sempron SI-42.

Feature	Athlon XP 2500+	Mobile Sempron SI-42
Cores / Threads	1 / 1	1 / 1
Boost Clock	1.83 GHz	2.1 GHz+15%
L3 Cache	0 kB	—
L2 Cache	512 kB	512 kB
Process	130 nm	65 nm-50%
Architecture	Barton (2001−2004)	Sable (2008−2009)
PassMark	320	332+4%

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Memory & Platform

The Athlon XP 2500+ uses the A socket (PCIe 1.1), while the Mobile Sempron SI-42 uses S1g2 (PCIe 2.0) — making them incompatible on the same motherboard.