Atom Z515 vs Pentium III 1133

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 Z515 vs Pentium III 1133 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 Z515 vs Pentium III 1133: Pros, Cons & Final Verdict

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

Atom Z515

2009

Why buy it

✅Better for gaming: +25.0% higher average FPS across 50 shared CPU benchmark tests.

Trade-offs

❌2141.4% higher power demand at 650W vs 29W.

Pentium III 1133

2000

Why buy it

✅Draws 29W instead of 650W, a 621W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Atom Z515 across 50 shared CPU benchmark tests.
❌Lower PassMark (180 vs 195).
❌Launch MSRP is still $990 MSRP, while Atom Z515 mostly shows up through inconsistent older-market listings.

Quick Answers

So, is Atom Z515 better than Pentium III 1133?

Yes. Atom Z515 is the better all-around CPU here. It gives you a 25.0% average FPS lead across 50 shared CPU game tests in our data, 8.3% better PassMark, and the stronger long-term platform, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Atom Z515 is the better pick. According to our tests, it delivers 25.0% 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, Atom Z515 is the stronger fit. You are getting 8.3% better PassMark, backed by 1 cores and 1 threads.

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

Atom Z515 is still the much better call for a fresh build. Atom Z515 comes in at an unclear MSRP at unclear MSRP versus $990 MSRP, and it still gives you a 25.0% average FPS lead across 50 shared CPU game tests in our data. Pentium III 1133 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2000 platform. Even with 100.0% better value on paper (0.2 vs 0.0 PassMark/$), 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 Z515 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2009 vs 2000) and more multi-core headroom with 1 cores / 1 threads instead of 1/1. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Atom Z515 vs Pentium III 1133 Technical Specifications

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

Atom Z515

The Atom Z515 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 1 threads. Base frequency is 1.2 GHz, with boost up to 1.2 GHz. L3 cache: 0 kB. L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: PBGA441. Thermal design power (TDP): 1.4 Watt. Memory support: unknown. Passmark benchmark score: 195 points. Launch price was $69.

Pentium III 1133

The Pentium III 1133 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: 1.13 GHz. L3 cache: 0 kB. L2 cache: 256 kB. Built on 180 nm process technology. Socket: PGA370. Thermal design power (TDP): 29 Watt. Passmark benchmark score: 180 points. Launch price was $69.

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Processing Power

Both the Atom Z515 and Pentium III 1133 share an identical 1-core/1-thread configuration. Boost clocks reach 1.2 GHz on the Atom Z515 versus 1.13 GHz on the Pentium III 1133 — a 6% clock advantage for the Atom Z515. The Atom Z515 uses the Silverthorne (2008−2010) architecture (45 nm), while the Pentium III 1133 uses Tualatin (2000−2002) (180 nm). In PassMark, the Atom Z515 scores 195 against the Pentium III 1133's 180 — a 8% lead for the Atom Z515. Both processors carry 0 kB of L3 cache.

Feature	Atom Z515	Pentium III 1133
Cores / Threads	1 / 1	1 / 1
Boost Clock	1.2 GHz+6%	1.13 GHz
Base Clock	1.2 GHz	—
L3 Cache	0 kB	0 kB
L2 Cache	512 kB (per core)+100%	256 kB
Process	45 nm-75%	180 nm
Architecture	Silverthorne (2008−2010)	Tualatin (2000−2002)
PassMark	195+8%	180

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Memory & Platform

The Atom Z515 uses the PBGA441 socket (PCIe 2.0), while the Pentium III 1133 uses PGA370 (PCIe 1.1) — making them incompatible on the same motherboard.