Pentium M 1.40 vs Atom E3815

Pentium M 1.40

1 Cores1 Thrd24 WWMax: 1.4 GHz2003

Atom E3815

1 Cores1 Thrd512 WWMax: 1.47 GHz2013

Performance Spectrum - CPU

Pentium M 1.40

1 / 1

345

0.0%

365

+5.8%

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.

Value Upgrade Path

This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. Components placed above yours deliver better value for money. The Pentium M 1.40 is positioned at rank 271 and the Atom E3815 is on rank 1103, so the Pentium M 1.40 offers better cost-efficiency for playing games.

MSRP is the manufacturer's suggested retail price.•
Avg price is the current average price collected from markets across the web.

Performance Per Dollar Pentium M 1.40

#256

Atom x5-Z8300

MSRP: $20|Avg: N/A

425%

#257

Atom Z3735G

MSRP: $17|Avg: N/A

419%

#258

Core i5-480M

MSRP: $81|Avg: $77

385%

#259

Core i5-460M

MSRP: $80|Avg: $129

383%

#260

Core i5-2540M

MSRP: $266|Avg: $10

379%

#262

Core i5-450M

MSRP: $32|Avg: $31

366%

#263

Core i3-380M

MSRP: $49|Avg: $25

351%

#264

Core i5-430M

MSRP: N/A|Avg: $33

351%

#265

Core 2 Duo T6600

MSRP: N/A|Avg: $4

341%

#271

Pentium M 1.40

MSRP: N/A|Avg: N/A

100%

#274

Core 2 Extreme X9100

MSRP: $851|Avg: N/A

100%

Based on actual market prices and performance synthetic scores.

Performance Per Dollar Atom E3815

#1091

Atom x5-Z8300

MSRP: $20|Avg: N/A

3214%

#1092

Atom Z3735G

MSRP: $17|Avg: N/A

3166%

#1093

Core i5-480M

MSRP: $81|Avg: $77

2907%

#1094

Core i5-460M

MSRP: $80|Avg: $129

2894%

#1095

Core i5-2540M

MSRP: $266|Avg: $10

2867%

#1097

Core i5-450M

MSRP: $32|Avg: $31

2769%

#1098

Core i3-380M

MSRP: $49|Avg: $25

2655%

#1099

Core i5-430M

MSRP: N/A|Avg: $33

2651%

#1100

Core 2 Duo T6600

MSRP: N/A|Avg: $4

2579%

#1103

Atom E3815

MSRP: N/A|Avg: N/A

100%

#1104

Pentium 997

MSRP: $134|Avg: $10

99%

#1105

Pentium A1018

MSRP: $132|Avg: $15

99%

#1106

Core i5-2430M

MSRP: $225|Avg: N/A

98%

#1108

Pentium Dual Core T4500

MSRP: $150|Avg: $30

98%

#1109

Celeron B820

MSRP: $86|Avg: $15

97%

#1110

Pentium B980

MSRP: $125|Avg: $35

96%

#1111

Celeron 867

MSRP: $86|Avg: $15

96%

#1112

Pentium B970

MSRP: $125|Avg: $39

96%

#1113

Core i5-2410M

MSRP: $225|Avg: N/A

95%

#1114

Pentium T2370

MSRP: $86|Avg: $10

95%

#1115

Pentium N3710

MSRP: $161|Avg: $50

94%

#1116

Core m3-7Y30

MSRP: $281|Avg: $281

94%

#1117

Pentium 977

MSRP: $134|Avg: $10

94%

#1118

Core i7-2715QE

MSRP: $378|Avg: $50

93%

Based on actual market prices and performance synthetic scores.

Performance Comparison

About PassMark

🏆 Chipversus Verdict

🚀 Performance Leadership

Generational Difference: This comparison involves processors from different technological eras. The Atom E3815 (2013) utilizes 22 nm technology and DDR3, providing a fundamental performance advantage.

Insight	Pentium M 1.40	Atom E3815
Gaming	❌ Lower gaming performance	✅ Superior gaming performance
Workstation	❌ Weaker in multi-core tasks	✅ Better multi-core power
Price	Equivalent pricing	Equivalent pricing
Longevity	🛑 Legacy (Banias (2003) / 130 nm)	🛑 Legacy (Bay Trail-I (2013) / 22 nm)

💎 Value Proposition

The Pentium M 1.40 (2003) relies on 130 nm technology and DDR1, DDR2, placing it in a different performance category relative to modern standards.

Insight	Pentium M 1.40	Atom E3815
Cost Efficiency	❌ Lower cost efficiency	❌ Lower cost efficiency
Upfront Cost	Equivalent pricing	Equivalent pricing

Performance Check

Paired with RTX 4090

To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.

Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.

Pentium M 1.40 Benchmark Check

Atom E3815 Benchmark Check

Technical Specifications

Side-by-side comparison of Pentium M 1.40 and Atom E3815

Pentium M 1.40

The Pentium M 1.40 is manufactured by Intel. It was released in 2007-01-01. It is based on the Banias (2003) architecture. It features 1 cores and 1 threads. Max frequency: 1.4 GHz. L3 cache: 0 kB. L2 cache: 1 MB. Built on 130 nm process technology. Socket: PGA478. Thermal design power (TDP): 24 Watt. Memory support: DDR1, DDR2. Passmark benchmark score: 345 points. Launch price was $69.

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.

⚡

Processing Power

Both the Pentium M 1.40 and Atom E3815 share an identical 1-core/1-thread configuration. Boost clocks reach 1.4 GHz on the Pentium M 1.40 versus 1.47 GHz on the Atom E3815 — a 4.9% clock advantage for the Atom E3815. The Pentium M 1.40 uses the Banias (2003) architecture (130 nm), while the Atom E3815 uses Bay Trail-I (2013) (22 nm). In PassMark, the Pentium M 1.40 scores 345 against the Atom E3815's 365 — a 5.6% lead for the Atom E3815. Both processors carry 0 kB of L3 cache.

Feature	Pentium M 1.40	Atom E3815
Cores / Threads	1 / 1	1 / 1
Boost Clock	1.4 GHz	1.47 GHz+5%
L3 Cache	0 kB	0 kB
L2 Cache	1 MB+100%	512 kB (per core)
Process	130 nm	22 nm-83%
Architecture	Banias (2003)	Bay Trail-I (2013)
PassMark	345	365+6%

🧠

Memory & Platform

The Pentium M 1.40 uses the PGA478 socket (PCIe 1.1), while the Atom E3815 uses FCBGA1170 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Pentium M 1.40	Atom E3815
Socket	PGA478	FCBGA1170
PCIe Generation	PCIe 1.1	PCIe 2.0+82%
Max RAM Speed	—	DDR3L-1066
Max RAM Capacity	—	8 GB
RAM Channels	—	1
ECC Support	—	✅
PCIe Lanes	—	4