Athlon XP 2800+ vs Atom Z550

Athlon XP 2800+ vs Atom Z550 Performance Spectrum

Athlon XP 2800+

1 / 1

380

+1.3%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Atom Z550

1 / 2

375

0.0%

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 2800+ vs Atom Z550 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 2800+ vs Atom Z550: 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 2800+

2001

Why buy it

✅Better for gaming: +10.9% higher average FPS across 50 shared CPU benchmark tests.
✅Includes a boxed cooler (Stock), unlike Atom Z550.

Trade-offs

❌Launch MSRP is still $375 MSRP, while Atom Z550 mostly shows up through inconsistent older-market listings.
❌2983.3% higher power demand at 74W vs 2.4W.

Atom Z550

2009

Why buy it

✅Draws 2W instead of 74W, a 72W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Athlon XP 2800+ across 50 shared CPU benchmark tests.
❌Lower PassMark (375 vs 380).
❌No boxed cooler included, unlike Athlon XP 2800+.

Quick Answers

So, is Athlon XP 2800+ better than Atom Z550?

Yes. Athlon XP 2800+ is the better all-around CPU here. It gives you a 10.9% average FPS lead across 50 shared CPU game tests in our data and 1.3% 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 2800+ is the better pick. According to our tests, it delivers 10.9% 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 2800+ is the stronger fit. You are getting 1.3% better PassMark, backed by 1 cores and 1 threads.

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

Athlon XP 2800+ is the better buy right now. Athlon XP 2800+ comes in at an unclear MSRP at $375 MSRP versus unclear MSRP, and it still gives you a 10.9% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (1.0 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Atom Z550 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2009 vs 2001). That makes it the safer long-term bet.

Athlon XP 2800+ vs Atom Z550 Technical Specifications

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

Athlon XP 2800+

The Athlon XP 2800+ 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: 2.25 GHz. L3 cache: 0 kB. L2 cache: 512K. Built on 130 nm process technology. Socket: A. Thermal design power (TDP): 74 Watt. Passmark benchmark score: 380 points. Launch price was $149.

Atom Z550

The Atom Z550 is manufactured by Intel. It was released in 8 April 2009 (16 years ago). It is based on the Silverthorne (2008−2010) architecture. It features 1 cores and 2 threads. Base frequency is 2 GHz, with boost up to 2 GHz. L3 cache: 0 kB. L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: PBGA441. Thermal design power (TDP): 2.4 Watt. Memory support: unknown. Passmark benchmark score: 375 points. Launch price was $69.

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Processing Power

The Athlon XP 2800+ packs 1 cores / 1 threads, matching the Atom Z550's 1 cores. Boost clocks reach 2.25 GHz on the Athlon XP 2800+ versus 2 GHz on the Atom Z550 — a 11.8% clock advantage for the Athlon XP 2800+. The Athlon XP 2800+ uses the Barton (2001−2004) architecture (130 nm), while the Atom Z550 uses Silverthorne (2008−2010) (45 nm). In PassMark, the Athlon XP 2800+ scores 380 against the Atom Z550's 375 — a 1.3% lead for the Athlon XP 2800+. Both processors carry 0 kB of L3 cache.

Feature	Athlon XP 2800+	Atom Z550
Cores / Threads	1 / 1	1 / 2
Boost Clock	2.25 GHz+13%	2 GHz
Base Clock	—	2 GHz
L3 Cache	0 kB	0 kB
L2 Cache	512K	512 kB (per core)
Process	130 nm	45 nm-65%
Architecture	Barton (2001−2004)	Silverthorne (2008−2010)
PassMark	380+1%	375
Geekbench 6 Single	250	—
Geekbench 6 Multi	250	—

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Memory & Platform

The Athlon XP 2800+ uses the A socket (PCIe 1.1), while the Atom Z550 uses PBGA441 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR-333 on the Athlon XP 2800+ versus DDR2-533 on the Atom Z550 — the Atom Z550 supports -260.1% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 2 GB of RAM. Both feature 1-channel memory with ECC support. Both provide 0 PCIe lanes. Chipset compatibility: KT400,nForce2 Ultra 400 (Athlon XP 2800+) and Intel US15W (Atom Z550).