Athlon 64 2800+ vs Athlon XP 3100+

Athlon 64 2800+ vs Athlon XP 3100+ Performance Spectrum

Athlon 64 2800+

1 / 1

420

0.0%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Athlon XP 3100+

1 / 1

425

+1.2%

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 64 2800+ vs Athlon XP 3100+ 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 64 2800+ vs Athlon XP 3100+: Pros, Cons & Final Verdict

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

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).
❌Lower PassMark per dollar, at 2.4 vs 2.8 PassMark/$ ($178 MSRP vs $150 MSRP).
❌30.9% higher power demand at 89W vs 68W.

Athlon XP 3100+

2003

Why buy it

✅Better for gaming: +9.6% higher average FPS across 50 shared CPU benchmark tests.
✅Costs $28 less on MSRP ($150 MSRP vs $178 MSRP).
✅Delivers 20.1% more PassMark for each dollar spent, at 2.8 vs 2.4 PassMark/$ ($150 MSRP vs $178 MSRP).
✅Draws 68W instead of 89W, a 21W reduction.

Trade-offs

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

Quick Answers

So, is Athlon XP 3100+ better than 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 $28 cheaper on MSRP at $150 MSRP versus $178 MSRP, and it still gives you a 9.6% average FPS lead across 50 shared CPU game tests in our data. It is also 20.1% better value on MSRP (2.8 vs 2.4 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

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 64 2800+ vs Athlon XP 3100+ Technical Specifications

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

Athlon 64 2800+

The Athlon 64 2800+ is manufactured by AMD. It was released in Abril 2004 (21 years ago). It is based on the NewCastle (2004) architecture. It features 1 cores and 1 threads. Max frequency: 1.8 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 130 nm process technology. Socket: 754. Thermal design power (TDP): 89 Watt. Passmark benchmark score: 420 points. Launch price was $100.

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.

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Processing Power

Both the Athlon 64 2800+ and Athlon XP 3100+ share an identical 1-core/1-thread configuration. Boost clocks reach 1.8 GHz on the Athlon 64 2800+ versus 2.2 GHz on the Athlon XP 3100+ — a 20% clock advantage for the Athlon XP 3100+. The Athlon 64 2800+ uses the NewCastle (2004) architecture (130 nm), while the Athlon XP 3100+ uses Thorton (2001−2003) (130 nm). In PassMark, the Athlon 64 2800+ scores 420 against the Athlon XP 3100+'s 425 — a 1.2% lead for the Athlon XP 3100+. Both processors carry 0 kB of L3 cache.

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

🧠

Memory & Platform

The Athlon 64 2800+ uses the 754 socket (PCIe 1.1), while the Athlon XP 3100+ uses A (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR-400 on the Athlon 64 2800+ versus DDR-333 on the Athlon XP 3100+ — the Athlon XP 3100+ supports -16.8% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 4 GB of RAM. Both feature 1-channel memory with ECC support. Both provide 0 PCIe lanes. Chipset compatibility: AMD 754 (Athlon 64 2800+) and AMD Socket A (Athlon XP 3100+).

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

💰

Value Analysis

At launch, the Athlon 64 2800+ was priced at $178, while the Athlon XP 3100+ came in at $150. On launch pricing ($178 vs $150), Athlon XP 3100+ was $28 cheaper. In terms of value on MSRP (PassMark points per dollar), the Athlon 64 2800+ delivers 2.4 pts/$ vs 2.8 pts/$ for the Athlon XP 3100+ — making the Athlon XP 3100+ the 18.2% better value option.

Feature	Athlon 64 2800+	Athlon XP 3100+
MSRP	$178	$150-16%
Performance per Dollar	2.4	2.8+17%
Release Date	2004	2003

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