Atom D425 vs Mobile Pentium 4 2.66

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 D425 vs Mobile 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.

Atom D425 vs Mobile 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.

Atom D425

2010

Why buy it

✅Draws 10W instead of 66W, a 56W reduction.
✅Integrated graphics onboard with Intel GMA 3150, while Mobile Pentium 4 2.66 needs a discrete GPU.

Trade-offs

❌Lower PassMark (385 vs 395).

Mobile Pentium 4 2.66

2003

Why buy it

Trade-offs

❌560% higher power demand at 66W vs 10W.
❌No integrated graphics, while Atom D425 can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Mobile Pentium 4 2.66 better than Atom D425?

Yes. Mobile Pentium 4 2.66 is the better all-around CPU here. It gives you a 0.4% average FPS lead across 50 shared CPU game tests in our data and 2.6% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Mobile Pentium 4 2.66 is the better pick. According to our tests, it delivers 0.4% 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, Mobile Pentium 4 2.66 is the stronger fit. You are getting 2.6% better PassMark, backed by 1 cores and 2 threads.

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

Mobile Pentium 4 2.66 still makes the most sense overall. Mobile Pentium 4 2.66 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 0.4% average FPS lead across 50 shared CPU game tests in our data.

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

Atom D425 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2010 vs 2003). That makes it the safer long-term bet.

Atom D425 vs Mobile Pentium 4 2.66 Technical Specifications

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

Atom D425

The Atom D425 is manufactured by Intel. It was released in 21 June 2010 (15 years ago). It is based on the Pineview (2009−2011) architecture. It features 1 cores and 2 threads. Base frequency is 1.8 GHz, with boost up to 1.83 GHz. L3 cache: 0 kB. L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: FCBGA559. Thermal design power (TDP): 10 Watt. Memory support: DDR2, DDR3. Passmark benchmark score: 385 points. Launch price was $993.

Mobile Pentium 4 2.66

The Mobile Pentium 4 2.66 is manufactured by Intel. It was released in Junho 2003 (22 years ago). It is based on the Northwood (2002−2004) architecture. It features 1 cores and 2 threads. Max frequency: 2.67 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 130 nm process technology. Socket: PGA478. Thermal design power (TDP): 66 Watt. Memory support: DDR1, DDR2. Passmark benchmark score: 395 points. Launch price was $69.

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Processing Power

Both the Atom D425 and Mobile Pentium 4 2.66 share an identical 1-core/2-thread configuration. Boost clocks reach 1.83 GHz on the Atom D425 versus 2.67 GHz on the Mobile Pentium 4 2.66 — a 37.3% clock advantage for the Mobile Pentium 4 2.66. The Atom D425 uses the Pineview (2009−2011) architecture (45 nm), while the Mobile Pentium 4 2.66 uses Northwood (2002−2004) (130 nm). In PassMark, the Atom D425 scores 385 against the Mobile Pentium 4 2.66's 395 — a 2.6% lead for the Mobile Pentium 4 2.66. Both processors carry 0 kB of L3 cache.

Feature	Atom D425	Mobile Pentium 4 2.66
Cores / Threads	1 / 2	1 / 2
Boost Clock	1.83 GHz	2.67 GHz+46%
Base Clock	1.8 GHz	—
L3 Cache	0 kB	0 kB
L2 Cache	512 kB (per core)	512 kB
Process	45 nm-65%	130 nm
Architecture	Pineview (2009−2011)	Northwood (2002−2004)
PassMark	385	395+3%
Geekbench 6 Single	—	800
Geekbench 6 Multi	—	800

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Memory & Platform

The Atom D425 uses the FCBGA559 socket (PCIe 2.0), while the Mobile Pentium 4 2.66 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-800 on the Atom D425 versus DDR2 on the Mobile Pentium 4 2.66 — the Atom D425 supports 39900% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 4 GB of RAM. Both feature 1-channel memory with ECC support. Both provide 0 PCIe lanes. Chipset compatibility: Intel NM10 (Atom D425) and 852PM,855PM (Mobile Pentium 4 2.66).

Feature	Atom D425	Mobile Pentium 4 2.66
Socket	FCBGA559	PGA478
PCIe Generation	PCIe 2.0+82%	PCIe 1.1
Max RAM Speed	DDR3-800+39900%	DDR2
Max RAM Capacity	4 GB	4 GB
RAM Channels	1	1
ECC Support	No	No
PCIe Lanes	0	0

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Advanced Features

Virtualization: not specified (Atom D425) / None (Mobile Pentium 4 2.66). The Atom D425 includes integrated graphics (Intel GMA 3150), while the Mobile Pentium 4 2.66 requires a dedicated GPU. Primary use case: Mobile Pentium 4 2.66 targets Legacy Laptop.