Athlon XP 1900+ vs Atom Z520

Athlon XP 1900+ vs Atom Z520 Performance Spectrum

Athlon XP 1900+

1 / 1

238

+10.7%

Athlon XP 1600+

Ryzen 7 4700GE

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Ryzen Threadripper 7970X

Ryzen Threadripper PRO 7985WX

Ryzen Threadripper 7980X

Atom Z520

1 / 2

215

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 1900+ vs Atom Z520 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 1900+ vs Atom Z520: 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 1900+

2001

Why buy it

✅Better for gaming: +20.0% higher average FPS across 46 shared CPU benchmark tests.

Trade-offs

❌Launch MSRP is still $269 MSRP, while Atom Z520 mostly shows up through inconsistent older-market listings.
❌3300% higher power demand at 68W vs 2W.

Atom Z520

2008

Why buy it

✅Draws 2W instead of 68W, a 66W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Athlon XP 1900+ across 46 shared CPU benchmark tests.
❌Lower PassMark (215 vs 238).

Quick Answers

So, is Athlon XP 1900+ better than Atom Z520?

Yes. Athlon XP 1900+ is the better all-around CPU here. It gives you a 20.0% average FPS lead across 46 shared CPU game tests in our data and 10.7% 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 1900+ is the better pick. According to our tests, it delivers 20.0% more average FPS across 46 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Athlon XP 1900+ is the stronger fit. You are getting 10.7% better PassMark, backed by 1 cores and 1 threads.

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

Athlon XP 1900+ is the better buy right now. Athlon XP 1900+ comes in at an unclear MSRP at $269 MSRP versus unclear MSRP, and it still gives you a 20.0% average FPS lead across 46 shared CPU game tests in our data. It is also 100.0% better value on MSRP (0.9 vs 0.0 PassMark/$), 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 Z520 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2008 vs 2001). That makes it the safer long-term bet.

Athlon XP 1900+ vs Atom Z520 Technical Specifications

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

Athlon XP 1900+

The Athlon XP 1900+ is manufactured by AMD. It was released in 2009-01-01. It is based on the Thoroughbred (2001−2002) architecture. It features 1 cores and 1 threads. Max frequency: 1.6 GHz. L3 cache: 0 kB. L2 cache: 256 kB. Built on 180 nm process technology. Socket: A. Thermal design power (TDP): 68 Watt. Passmark benchmark score: 238 points. Launch price was $149.

Atom Z520

The Atom Z520 is manufactured by Intel. It was released in 2 April 2008 (17 years ago). It is based on the Silverthorne (2008−2010) architecture. It features 1 cores and 2 threads. Base frequency is 1.33 GHz, with boost up to 0.03 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 45 nm process technology. Socket: PBGA441. Thermal design power (TDP): 2 Watt. Passmark benchmark score: 215 points. Launch price was $65.

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Processing Power

The Athlon XP 1900+ packs 1 cores / 1 threads, matching the Atom Z520's 1 cores. Boost clocks reach 1.6 GHz on the Athlon XP 1900+ versus 0.03 GHz on the Atom Z520 — a 192.6% clock advantage for the Athlon XP 1900+. The Athlon XP 1900+ uses the Thoroughbred (2001−2002) architecture (180 nm), while the Atom Z520 uses Silverthorne (2008−2010) (45 nm). In PassMark, the Athlon XP 1900+ scores 238 against the Atom Z520's 215 — a 10.2% lead for the Athlon XP 1900+. Both processors carry 0 kB of L3 cache.

Feature	Athlon XP 1900+	Atom Z520
Cores / Threads	1 / 1	1 / 2
Boost Clock	1.6 GHz+5233%	0.03 GHz
Base Clock	—	1.33 GHz
L3 Cache	0 kB	0 kB
L2 Cache	256 kB	512 kB+100%
Process	180 nm	45 nm-75%
Architecture	Thoroughbred (2001−2002)	Silverthorne (2008−2010)
PassMark	238+11%	215

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Memory & Platform

The Athlon XP 1900+ uses the A socket (PCIe 1.1), while the Atom Z520 uses PBGA441 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR-266 on the Athlon XP 1900+ versus DDR2-533 on the Atom Z520 — the Atom Z520 supports -300.4% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Athlon XP 1900+ 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 1900+) and Intel US15W (Atom Z520).