Mobile Sempron M100 vs Xeon 2.66

Mobile Sempron M100 vs Xeon 2.66 Performance Spectrum

Mobile Sempron M100

1 / 1

448

+0.7%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Xeon 2.66

1 / 1

445

0.0%

Atom 230

Pentium 4 2.26

Pentium M 1.40

Mobile Pentium 4 2.66

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.

Mobile Sempron M100 vs Xeon 2.66 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.

Mobile Sempron M100 vs Xeon 2.66: Pros, Cons & Final Verdict

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

Mobile Sempron M100

2009

Why buy it

✅+0.7% higher PassMark.

Trade-offs

❌475.3% higher power demand at 512W vs 89W.

Xeon 2.66

2002

Why buy it

✅Draws 89W instead of 512W, a 423W reduction.

Trade-offs

❌Lower PassMark (445 vs 448).
❌Launch MSRP is still $337 MSRP, while Mobile Sempron M100 mostly shows up through inconsistent older-market listings.

Quick Answers

So, is Xeon 2.66 better than Mobile Sempron M100?

Not really, because they are built for different jobs. Xeon 2.66 makes more sense for workstation-style multi-core throughput, while Mobile Sempron M100 is the more practical desktop choice for gaming, platform cost, and everyday use.

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

For streaming, content creation, and heavier multitasking, Mobile Sempron M100 is the stronger fit. You are getting 0.7% better PassMark, backed by 1 cores and 1 threads.

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

Xeon 2.66 is the better buy right now. Xeon 2.66 comes in at an unclear MSRP at $337 MSRP versus unclear MSRP, and it still gives you a 0.2% average FPS lead across 40 shared CPU game tests in our data. The compromise is that Mobile Sempron M100 is still stronger for heavier multi-core work with 0.7% better PassMark. It is also 100.0% better value on MSRP (1.3 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Mobile Sempron M100 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2009 vs 2002) 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.

Mobile Sempron M100 vs Xeon 2.66 Technical Specifications

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

Mobile Sempron M100

The Mobile Sempron M100 is manufactured by AMD. It was released in 10 September 2009 (16 years ago). It is based on the Caspian (2009) architecture. It features 1 cores and 1 threads. Max frequency: 2 GHz. L2 cache: 512 kB. Built on 40 nm process technology. Socket: S. Thermal design power (TDP): 512 kB. Passmark benchmark score: 448 points. Launch price was $69.

Xeon 2.66

The Xeon 2.66 is manufactured by Intel. It was released in 2015-01-01. It is based on the Prestonia (2002) architecture. It features 1 cores and 1 threads. Max frequency: 2.66 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 130 nm process technology. Socket: PGA604. Thermal design power (TDP): 89 Watt. Passmark benchmark score: 445 points. Launch price was $800.

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Processing Power

Both the Mobile Sempron M100 and Xeon 2.66 share an identical 1-core/1-thread configuration. Boost clocks reach 2 GHz on the Mobile Sempron M100 versus 2.66 GHz on the Xeon 2.66 — a 28.3% clock advantage for the Xeon 2.66. The Mobile Sempron M100 uses the Caspian (2009) architecture (40 nm), while the Xeon 2.66 uses Prestonia (2002) (130 nm). In PassMark, the Mobile Sempron M100 scores 448 against the Xeon 2.66's 445 — a 0.7% lead for the Mobile Sempron M100.

Feature	Mobile Sempron M100	Xeon 2.66
Cores / Threads	1 / 1	1 / 1
Boost Clock	2 GHz	2.66 GHz+33%
L3 Cache	—	0 kB
L2 Cache	512 kB	512 kB
Process	40 nm-69%	130 nm
Architecture	Caspian (2009)	Prestonia (2002)
PassMark	448	445

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Memory & Platform

The Mobile Sempron M100 uses the S socket (PCIe 2.0), while the Xeon 2.66 uses PGA604 (PCIe 2.0) — making them incompatible on the same motherboard.