Mobile Pentium 4 2.66 vs Ryzen 9 5900X

Mobile Pentium 4 2.66

1 Cores2 Thrd66 WWMax: 2.67 GHz2003

Ryzen 9 5900X

12 Cores24 Thrd105 WWMax: 4.8 GHz2020

Performance Spectrum - CPU

Mobile Pentium 4 2.66

1 / 2

395

0.0%

38,955

+9762.0%

Ryzen Threadripper 9960X

Ryzen Threadripper PRO 9975WX

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. The Mobile Pentium 4 2.66 is positioned at rank #771 in our cost-efficiency ranking, representing a Lower cost-benefit for your build. Components placed above yours deliver better value for money.

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

Performance Per Dollar Mobile Pentium 4 2.66

#759

Atom x5-Z8300

MSRP: $20|Avg: N/A

1114%

#760

Atom Z3735G

MSRP: $17|Avg: N/A

1098%

#761

Core i5-480M

MSRP: $81|Avg: $77

1008%

#762

Core i5-460M

MSRP: $80|Avg: $129

1003%

#763

Core i5-2540M

MSRP: $266|Avg: $10

994%

#765

Core i5-450M

MSRP: $32|Avg: $31

960%

#766

Core i3-380M

MSRP: $49|Avg: $25

921%

#767

Core i5-430M

MSRP: N/A|Avg: $33

919%

#768

Core 2 Duo T6600

MSRP: N/A|Avg: $4

894%

#771

Mobile Pentium 4 2.66

MSRP: N/A|Avg: N/A

100%

#772

Core i7-9750HF

MSRP: $395|Avg: $395

100%

Based on actual market prices and performance synthetic scores.

Performance Per Dollar Ryzen 9 5900X

#141

Core i9-13900K

MSRP: $599|Avg: $500

105%

#142

Core i3-14100

MSRP: $134|Avg: $131

104%

#143

Ryzen 5 3400G

MSRP: $149|Avg: $80

103%

#144

Core i7-10700KF

MSRP: $405|Avg: $160

103%

#145

Core i5-11600K

MSRP: $262|Avg: $170

103%

#146

Core i7-13700K

MSRP: $409|Avg: $400

103%

#147

Ryzen 5 PRO 3400G

MSRP: $149|Avg: $80

102%

#148

Ryzen 7 PRO 2700X

MSRP: $329|Avg: $150

102%

#149

Core i9-12900KS

MSRP: $739|Avg: $385

102%

#150

Ryzen 5 5500X3D

MSRP: $185|Avg: $180

101%

#151

Core Ultra 7 265T

MSRP: $384|Avg: $362

101%

#152

Ryzen 3 3200GE

MSRP: $85|Avg: $64

101%

#153

Core i3-9100T

MSRP: $122|Avg: $50

101%

#154

Ryzen 5 4600G

MSRP: $154|Avg: $143

100%

#155

Core i7-13700T

MSRP: $384|Avg: $250

100%

#156

Ryzen 9 5900X

MSRP: $549|Avg: $350

100%

#157

Core i7-13700F

MSRP: $359|Avg: $345

100%

#158

Core i5-13600T

MSRP: $255|Avg: $255

99%

#159

Ryzen 5 3400GE

MSRP: $149|Avg: $80

99%

#160

Core i7-12700F

MSRP: $314|Avg: $275

99%

#161

Core i5-9400

MSRP: $192|Avg: $85

99%

#162

Core i3-13100

MSRP: $134|Avg: $128

99%

#163

Core i9-10910

MSRP: $488|Avg: $200

96%

#164

Core i5-14600T

MSRP: $255|Avg: $255

96%

#165

Core i5-11500T

MSRP: $192|Avg: $120

95%

#166

Ryzen 7 5700X3D

MSRP: $249|Avg: $249

95%

#167

Ryzen 3 8300GE

MSRP: $129|Avg: $129

95%

#168

Core i3-13100T

MSRP: $134|Avg: $122

94%

#169

Core i5-10600T

MSRP: $213|Avg: $110

94%

#170

Ryzen 3 3200G

MSRP: $100|Avg: $67

94%

#171

Core Ultra 9 285

MSRP: $589|Avg: $550

94%

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 Ryzen 9 5900X (2020) utilizes 7 nm, 12 nm technology and DDR4-3200, providing a fundamental performance advantage.

Insight	Mobile Pentium 4 2.66	Ryzen 9 5900X
Gaming	❌ Lower gaming performance	✅ Superior gaming performance
Workstation	❌ Weaker in multi-core tasks	✅ Better multi-core power
Price	✅ More affordable ($0)	⚠️ Higher cost ($350)
Longevity	🛑 Legacy (Northwood (2002−2004) / 130 nm)	✨ Modern (Vermeer (Zen3) (2020−2022) / 7 nm, 12 nm)

💎 Value Proposition

The Mobile Pentium 4 2.66 (2003) relies on 130 nm technology and DDR1, DDR2, placing it in a different performance category relative to modern standards.

Insight	Mobile Pentium 4 2.66	Ryzen 9 5900X
Cost Efficiency	❌ Lower cost efficiency	❌ Lower cost efficiency
Upfront Cost	✅ More affordable ($0)	⚠️ Higher cost ($350)

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.

Mobile Pentium 4 2.66 Benchmark Check

Ryzen 9 5900X Benchmark Check

Technical Specifications

Side-by-side comparison of Mobile Pentium 4 2.66 and Ryzen 9 5900X

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.

Ryzen 9 5900X

The Ryzen 9 5900X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen3) (2020−2022) architecture. It features 12 cores and 24 threads. Base frequency is 3.7 GHz, with boost up to 4.8 GHz. L3 cache: 64 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4-3200. Passmark benchmark score: 38,955 points. Launch price was $549.

⚡

Processing Power

The Mobile Pentium 4 2.66 packs 1 cores / 2 threads, while the Ryzen 9 5900X offers 12 cores / 24 threads — the Ryzen 9 5900X has 11 more cores. Boost clocks reach 2.67 GHz on the Mobile Pentium 4 2.66 versus 4.8 GHz on the Ryzen 9 5900X — a 57% clock advantage for the Ryzen 9 5900X. The Mobile Pentium 4 2.66 uses the Northwood (2002−2004) architecture (130 nm), while the Ryzen 9 5900X uses Vermeer (Zen3) (2020−2022) (7 nm, 12 nm). In PassMark, the Mobile Pentium 4 2.66 scores 395 against the Ryzen 9 5900X's 38,955 — a 196% lead for the Ryzen 9 5900X. Geekbench 6 single-core — the metric most relevant to gaming — records 800 vs 2,174, a 92.4% lead for the Ryzen 9 5900X that directly translates to higher frame rates. Multi-core Geekbench: 800 vs 11,888 (174.8% advantage for the Ryzen 9 5900X). L3 cache: 0 kB on the Mobile Pentium 4 2.66 vs 64 MB on the Ryzen 9 5900X.

Feature	Mobile Pentium 4 2.66	Ryzen 9 5900X
Cores / Threads	1 / 2	12 / 24+1100%
Boost Clock	2.67 GHz	4.8 GHz+80%
Base Clock	—	3.7 GHz
L3 Cache	0 kB	64 MB
L2 Cache	512 kB	512K (per core)
Process	130 nm	7 nm, 12 nm-95%
Architecture	Northwood (2002−2004)	Vermeer (Zen3) (2020−2022)
PassMark	395	38,955+9762%
Cinebench R23 Multi	—	21,000
Geekbench 6 Single	800	2,174+172%
Geekbench 6 Multi	800	11,888+1386%

🧠

Memory & Platform

The Mobile Pentium 4 2.66 uses the PGA478 socket (PCIe 1.1), while the Ryzen 9 5900X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR2 on the Mobile Pentium 4 2.66 versus DDR4-3200 on the Ryzen 9 5900X — the Ryzen 9 5900X supports 66.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 9 5900X supports up to 128 GB of RAM compared to 4 GB — 187.9% more capacity for professional workloads. Memory channels: 1 (Mobile Pentium 4 2.66) vs 2 (Ryzen 9 5900X). PCIe lanes: 0 (Mobile Pentium 4 2.66) vs 24 (Ryzen 9 5900X) — the Ryzen 9 5900X offers 24 more lanes for additional GPUs or NVMe drives. Chipset compatibility: 852PM,855PM (Mobile Pentium 4 2.66) and A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X).

Feature	Mobile Pentium 4 2.66	Ryzen 9 5900X
Socket	PGA478	AM4
PCIe Generation	PCIe 1.1	PCIe 4.0+264%
Max RAM Speed	DDR2	DDR4-3200+100%
Max RAM Capacity	4 GB	128 GB+3100%
RAM Channels	1	2+100%
ECC Support	❌	✅
PCIe Lanes	0	24

🔧

Advanced Features

Only the Ryzen 9 5900X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: None (Mobile Pentium 4 2.66) vs AMD-V (Ryzen 9 5900X). Primary use case: Mobile Pentium 4 2.66 targets Legacy Laptop, Ryzen 9 5900X targets Workstation. Direct competitor: Ryzen 9 5900X rivals Core i9-12900K.