Athlon XP 3100+ vs Mobile Athlon 64 2800+

Athlon XP 3100+ vs Mobile Athlon 64 2800+ Performance Spectrum

Athlon XP 3100+

1 / 1

425

+1.2%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Mobile Athlon 64 2800+

1 / 1

420

0.0%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

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 3100+ vs Mobile Athlon 64 2800+ 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 3100+ vs Mobile Athlon 64 2800+: 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 3100+

2003

Why buy it

✅Better for gaming: +9.6% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 68W instead of 512W, a 444W reduction.

Trade-offs

❌Launch MSRP is still $150 MSRP, while Mobile Athlon 64 2800+ mostly shows up through inconsistent older-market listings.

Mobile Athlon 64 2800+

2004

Why buy it

Trade-offs

❌Worse for gaming: lower average FPS than Athlon XP 3100+ across 50 shared CPU benchmark tests.
❌Lower PassMark (420 vs 425).
❌652.9% higher power demand at 512W vs 68W.

Quick Answers

So, is Athlon XP 3100+ better than Mobile Athlon 64 2800+?

Yes. Athlon XP 3100+ is the better all-around CPU here. It gives you a 9.6% average FPS lead across 50 shared CPU game tests in our data and 1.2% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Athlon XP 3100+ is the better pick. According to our tests, it delivers 9.6% 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, Athlon XP 3100+ 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?

Athlon XP 3100+ is the better buy right now. Athlon XP 3100+ comes in at an unclear MSRP at $150 MSRP versus unclear MSRP, and it still gives you a 9.6% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (2.8 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Mobile Athlon 64 2800+ makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2004 vs 2003). That makes it the safer long-term bet.

Athlon XP 3100+ vs Mobile Athlon 64 2800+ Technical Specifications

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

Athlon XP 3100+

The Athlon XP 3100+ is manufactured by AMD. It was released in 2009-01-01. It is based on the Thorton (2001−2003) architecture. It features 1 cores and 1 threads. Max frequency: 2.2 GHz. L3 cache: 0 kB. L2 cache: 256 kB. Built on 130 nm process technology. Socket: A. Thermal design power (TDP): 68 Watt. Passmark benchmark score: 425 points. Launch price was $149.

Mobile Athlon 64 2800+

The Mobile Athlon 64 2800+ is manufactured by AMD. It was released in Agosto 2004 (21 years ago). It is based on the Oakville (2003−2004) architecture. It features 1 cores and 1 threads. Max frequency: 1.8 GHz. L2 cache: 512K. Socket: 754. Thermal design power (TDP): 512 kB. Memory support: DDR1. Passmark benchmark score: 420 points. Launch price was $69.

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Processing Power

Both the Athlon XP 3100+ and Mobile Athlon 64 2800+ share an identical 1-core/1-thread configuration. Boost clocks reach 2.2 GHz on the Athlon XP 3100+ versus 1.8 GHz on the Mobile Athlon 64 2800+ — a 20% clock advantage for the Athlon XP 3100+. The Athlon XP 3100+ uses the Thorton (2001−2003) architecture (130 nm), while the Mobile Athlon 64 2800+ uses Oakville (2003−2004). In PassMark, the Athlon XP 3100+ scores 425 against the Mobile Athlon 64 2800+'s 420 — a 1.2% lead for the Athlon XP 3100+.

Feature	Athlon XP 3100+	Mobile Athlon 64 2800+
Cores / Threads	1 / 1	1 / 1
Boost Clock	2.2 GHz+22%	1.8 GHz
L3 Cache	0 kB	—
L2 Cache	256 kB	512K+100%
Process	130 nm	—
Architecture	Thorton (2001−2003)	Oakville (2003−2004)
PassMark	425+1%	420

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Memory & Platform

The Athlon XP 3100+ uses the A socket (PCIe 1.1), while the Mobile Athlon 64 2800+ uses 754 (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR-333 on the Athlon XP 3100+ versus 400 on the Mobile Athlon 64 2800+ — the Mobile Athlon 64 2800+ supports -220.1% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Athlon XP 3100+ supports up to 4 GB of RAM compared to 2 GB — 100% more capacity for professional workloads. Both feature 1-channel memory with ECC support. Both provide 0 PCIe lanes. Chipset compatibility: AMD Socket A (Athlon XP 3100+) and 754 (Mobile Athlon 64 2800+).

Feature	Athlon XP 3100+	Mobile Athlon 64 2800+
Socket	A	754
PCIe Generation	PCIe 1.1	PCIe 1.1
Max RAM Speed	DDR-333	400
Max RAM Capacity	4 GB+100%	2 GB
RAM Channels	1	1
ECC Support	No	No
PCIe Lanes	0	0

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Advanced Features

Virtualization: not specified (Athlon XP 3100+) / false (Mobile Athlon 64 2800+). Direct competitor: Mobile Athlon 64 2800+ rivals Pentium M 725.