Atom E3815 vs Mobile Pentium 4 2.40

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 E3815 vs Mobile Pentium 4 2.40 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 E3815 vs Mobile Pentium 4 2.40: Pros, Cons & Final Verdict

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

Atom E3815

2013

Why buy it

✅+5.8% higher PassMark.
✅100+% more PCIe lanes (4 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Intel HD Graphics (Bay Trail), while Mobile Pentium 4 2.40 needs a discrete GPU.

Trade-offs

❌753.3% higher power demand at 512W vs 60W.

Mobile Pentium 4 2.40

2003

Why buy it

✅Draws 60W instead of 512W, a 452W reduction.

Trade-offs

❌Lower PassMark (345 vs 365).
❌No integrated graphics, while Atom E3815 can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Atom E3815 better than Mobile Pentium 4 2.40?

It depends on what you want from the system. For gaming, Mobile Pentium 4 2.40 is ahead with 63.3% higher max boost clock. For rendering, compiling, streaming, and heavier multitasking, Atom E3815 pulls ahead with 5.8% better PassMark.

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

For streaming, content creation, and heavier multitasking, Atom E3815 is the stronger fit. You are getting 5.8% better PassMark, backed by 1 cores and 1 threads.

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

Atom E3815 still makes the most sense overall. Atom E3815 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you 5.8% better PassMark.

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

Atom E3815 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2013 vs 2003) and more multi-core headroom with 1 cores / 1 threads instead of 1/2. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Atom E3815 vs Mobile Pentium 4 2.40 Technical Specifications

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

Atom E3815

The Atom E3815 is manufactured by Intel. It was released in 8 October 2013 (12 years ago). It is based on the Bay Trail-I (2013) architecture. It features 1 cores and 1 threads. Max frequency: 1.47 GHz. L3 cache: 0 kB. L2 cache: 512 kB (per core). Built on 22 nm process technology. Socket: FCBGA1170. Thermal design power (TDP): 512 kB. Memory support: DDR3. Passmark benchmark score: 365 points. Launch price was $134.

Mobile Pentium 4 2.40

The Mobile Pentium 4 2.40 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: 2.4 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 130 nm process technology. Socket: PGA478. Thermal design power (TDP): 60 Watt. Memory support: DDR1, DDR2. Passmark benchmark score: 345 points. Launch price was $69.

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Processing Power

The Atom E3815 packs 1 cores / 1 threads, matching the Mobile Pentium 4 2.40's 1 cores. Boost clocks reach 1.47 GHz on the Atom E3815 versus 2.4 GHz on the Mobile Pentium 4 2.40 — a 48.1% clock advantage for the Mobile Pentium 4 2.40. The Atom E3815 uses the Bay Trail-I (2013) architecture (22 nm), while the Mobile Pentium 4 2.40 uses Northwood (2002−2004) (130 nm). In PassMark, the Atom E3815 scores 365 against the Mobile Pentium 4 2.40's 345 — a 5.6% lead for the Atom E3815. Both processors carry 0 kB of L3 cache.

Feature	Atom E3815	Mobile Pentium 4 2.40
Cores / Threads	1 / 1	1 / 2
Boost Clock	1.47 GHz	2.4 GHz+63%
L3 Cache	0 kB	0 kB
L2 Cache	512 kB (per core)	512 kB
Process	22 nm-83%	130 nm
Architecture	Bay Trail-I (2013)	Northwood (2002−2004)
PassMark	365+6%	345

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Memory & Platform

The Atom E3815 uses the FCBGA1170 socket (PCIe 2.0), while the Mobile Pentium 4 2.40 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard.

Feature	Atom E3815	Mobile Pentium 4 2.40
Socket	FCBGA1170	PGA478
PCIe Generation	PCIe 2.0+82%	PCIe 1.1
Max RAM Speed	DDR3L-1066	—
Max RAM Capacity	8 GB	—
RAM Channels	1	—
ECC Support	Yes	—
PCIe Lanes	4	—