Atom Z530 vs Pentium III 1400S

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.

Atom Z530 vs Pentium III 1400S 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.

Atom Z530 vs Pentium III 1400S: Pros, Cons & Final Verdict

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

Atom Z530

2008

Why buy it

✅+11.8% higher PassMark.
✅Draws 2W instead of 32W, a 30W reduction.

Trade-offs

❌No boxed cooler included, unlike Pentium III 1400S.

Pentium III 1400S

2002

Why buy it

✅Includes a boxed cooler (Yes), unlike Atom Z530.

Trade-offs

❌Lower PassMark (228 vs 255).
❌Launch MSRP is still $250 MSRP, while Atom Z530 mostly shows up through inconsistent older-market listings.
❌1354.5% higher power demand at 32W vs 2.2W.

Quick Answers

So, is Atom Z530 better than Pentium III 1400S?

It depends on what you want from the system. For gaming, Pentium III 1400S is ahead with 1300% higher max boost clock. For rendering, compiling, streaming, and heavier multitasking, Atom Z530 pulls ahead with 11.8% better PassMark.

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

For streaming, content creation, and heavier multitasking, Atom Z530 is the stronger fit. You are getting 11.8% better PassMark, backed by 1 cores and 2 threads.

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

Atom Z530 is still the much better call for a fresh build. Atom Z530 comes in at an unclear MSRP at unclear MSRP versus $250 MSRP, and it still gives you 11.8% better PassMark. Pentium III 1400S only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2002 platform. Even with 100.0% better value on paper (0.9 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on PGA370.

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

Atom Z530 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2008 vs 2002) and more multi-core headroom with 1 cores / 2 threads instead of 1/1. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Atom Z530 vs Pentium III 1400S Technical Specifications

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

Atom Z530

The Atom Z530 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 1.6 GHz, with boost up to 0.1 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: 255 points. Launch price was $95.

Pentium III 1400S

The Pentium III 1400S is manufactured by Intel. It was released in 2007-01-01. It is based on the Tualatin (2000−2002) architecture. It features 1 cores and 1 threads. Max frequency: 1.4 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 130 nm process technology. Socket: PGA370. Thermal design power (TDP): 32 Watt. Passmark benchmark score: 228 points. Launch price was $69.

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Processing Power

The Atom Z530 packs 1 cores / 2 threads, matching the Pentium III 1400S's 1 cores. Boost clocks reach 0.1 GHz on the Atom Z530 versus 1.4 GHz on the Pentium III 1400S — a 173.3% clock advantage for the Pentium III 1400S. The Atom Z530 uses the Silverthorne (2008−2010) architecture (45 nm), while the Pentium III 1400S uses Tualatin (2000−2002) (130 nm). In PassMark, the Atom Z530 scores 255 against the Pentium III 1400S's 228 — a 11.2% lead for the Atom Z530. Both processors carry 0 kB of L3 cache.

Feature	Atom Z530	Pentium III 1400S
Cores / Threads	1 / 2	1 / 1
Boost Clock	0.1 GHz	1.4 GHz+1300%
Base Clock	1.6 GHz	—
L3 Cache	0 kB	0 kB
L2 Cache	512 kB	512 kB
Process	45 nm-65%	130 nm
Architecture	Silverthorne (2008−2010)	Tualatin (2000−2002)
PassMark	255+12%	228

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Memory & Platform

The Atom Z530 uses the PBGA441 socket (PCIe 2.0), while the Pentium III 1400S uses PGA370 (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR2-533 on the Atom Z530 versus PC133 on the Pentium III 1400S — the Atom Z530 supports 300.8% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Pentium III 1400S 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: Intel US15W (Atom Z530) and Intel 815,VIA Apollo Pro 133T (Pentium III 1400S).

Feature	Atom Z530	Pentium III 1400S
Socket	PBGA441	PGA370
PCIe Generation	PCIe 2.0+82%	PCIe 1.1
Max RAM Speed	DDR2-533+301%	PC133
Max RAM Capacity	2 GB	4 GB+100%
RAM Channels	1	1
ECC Support	No	Yes
PCIe Lanes	0	0