Mobile Sempron 3300+ vs Pentium 4 2.66

Mobile Sempron 3300+ vs Pentium 4 2.66 Performance Spectrum

Mobile Sempron 3300+

1 / 1

376

0.0%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Pentium 4 2.66

1 / 1

378

+0.5%

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 3300+ vs Pentium 4 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 3300+ vs Pentium 4 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 3300+

2005

Why buy it

Trade-offs

❌Lower PassMark (376 vs 378).
❌16.4% higher power demand at 128W vs 110W.

Pentium 4 2.66

2002

Why buy it

✅Draws 110W instead of 128W, a 18W reduction.

Trade-offs

❌Launch MSRP is still $300 MSRP, while Mobile Sempron 3300+ mostly shows up through inconsistent older-market listings.

Quick Answers

So, is Pentium 4 2.66 better than Mobile Sempron 3300+?

Yes. Pentium 4 2.66 is the better all-around CPU here. It gives you 0.5% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Pentium 4 2.66 has the edge because it leads the single-thread side of this matchup with 33% higher max boost clock.

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

For streaming, content creation, and heavier multitasking, Pentium 4 2.66 is the stronger fit. You are getting 0.5% better PassMark, backed by 1 cores and 1 threads.

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

Pentium 4 2.66 is the better buy right now. Pentium 4 2.66 comes in at an unclear MSRP at $300 MSRP versus unclear MSRP, and it still gives you 0.5% higher PassMark. It is also 100.0% better value on MSRP (1.3 vs 0.0 PassMark/$), 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 3300+ makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2005 vs 2002). That makes it the safer long-term bet.

Mobile Sempron 3300+ vs Pentium 4 2.66 Technical Specifications

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

Mobile Sempron 3300+

The Mobile Sempron 3300+ is manufactured by AMD. It was released in 1 June 2005 (20 years ago). It is based on the Roma (2005) architecture. It features 1 cores and 1 threads. Max frequency: 2 GHz. L2 cache: 128 kB. Built on 90 nm process technology. Socket: 745. Thermal design power (TDP): 128 kB. Passmark benchmark score: 376 points. Launch price was $69.

Pentium 4 2.66

The Pentium 4 2.66 is manufactured by Intel. It was released in 2007-01-01. It is based on the NetBurst (2000−2006) 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: PGA478. Thermal design power (TDP): 110 Watt. Memory support: DDR1, DDR2. Passmark benchmark score: 378 points. Launch price was $69.

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Processing Power

Both the Mobile Sempron 3300+ and Pentium 4 2.66 share an identical 1-core/1-thread configuration. Boost clocks reach 2 GHz on the Mobile Sempron 3300+ versus 2.66 GHz on the Pentium 4 2.66 — a 28.3% clock advantage for the Pentium 4 2.66. The Mobile Sempron 3300+ uses the Roma (2005) architecture (90 nm), while the Pentium 4 2.66 uses NetBurst (2000−2006) (130 nm). In PassMark, the Mobile Sempron 3300+ scores 376 against the Pentium 4 2.66's 378 — a 0.5% lead for the Pentium 4 2.66.

Feature	Mobile Sempron 3300+	Pentium 4 2.66
Cores / Threads	1 / 1	1 / 1
Boost Clock	2 GHz	2.66 GHz+33%
L3 Cache	—	0 kB
L2 Cache	128 kB	512 kB+300%
Process	90 nm-31%	130 nm
Architecture	Roma (2005)	NetBurst (2000−2006)
PassMark	376	378

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Memory & Platform

The Mobile Sempron 3300+ uses the 745 socket (PCIe 2.0), while the Pentium 4 2.66 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard.