Core i7-1355U vs Xeon E5-2666 V3

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.

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

Performance Per Dollar Core i7-1355U

#119

Ryzen 7 PRO 250

MSRP: $400|Avg: $380

108%

#120

Core i7-11850HE

MSRP: $400|Avg: $75

106%

#124

Core i5-1240P

MSRP: $309|Avg: $200

104%

#125

Core i7-13700H

MSRP: $502|Avg: N/A

103%

#131

Core i7-1355U

MSRP: N/A|Avg: N/A

100%

#144

Core i7-12650H

MSRP: $457|Avg: N/A

94%

Based on actual market prices and performance synthetic scores.

Performance Per Dollar Xeon E5-2666 V3

#176

Xeon 6325P

MSRP: $281|Avg: $281

104%

#178

Xeon Silver 4510

MSRP: $563|Avg: $563

103%

#179

Xeon W-3223

MSRP: $294|Avg: $294

103%

#182

EPYC Embedded 8224P

MSRP: $855|Avg: $1048

102%

#187

Xeon Gold 5520+

MSRP: $1083|Avg: $764

101%

#188

EPYC 8124P

MSRP: $639|Avg: $639

100%

#190

Xeon E5-2666 V3

MSRP: N/A|Avg: N/A

100%

#196

Xeon 6515P

MSRP: $740|Avg: $886

98%

#201

Xeon Gold 6248R

MSRP: $2700|Avg: N/A

97%

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 Core i7-1355U (2023) utilizes Intel 7 nm technology and DDR5-5200, DDR4-3200, LPDDR4x-4267, providing a fundamental performance advantage.

Insight	Core i7-1355U	Xeon E5-2666 V3
Gaming	✅ Superior gaming performance	❌ Lower gaming performance
Workstation	✅ Better multi-core power	❌ Weaker in multi-core tasks
Price	Equivalent pricing	Equivalent pricing
Longevity	✨ Modern (Raptor Lake-U (2023) / Intel 7 nm)	🛑 Legacy (Haswell-EP (2014−2015) / 22 nm)

💎 Value Proposition

The Xeon E5-2666 V3 (2014) relies on 22 nm technology and **DDR3, DDR4 2133 MHz Quad-channel**, placing it in a different performance category relative to modern standards.

Insight	Core i7-1355U	Xeon E5-2666 V3
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.

Core i7-1355U Benchmark Check

Xeon E5-2666 V3 Benchmark Check

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Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i7-1355U and Xeon E5-2666 V3

Core i7-1355U

The Core i7-1355U is manufactured by Intel. It was released in 4 January 2023 (2 years ago). It is based on the Raptor Lake-U (2023) architecture. It features 10 cores and 12 threads. Base frequency is 1.7 GHz, with boost up to 5 GHz. L3 cache: 12 MB (total). L2 cache: 1.25 MB (per core). Built on Intel 7 nm process technology. Socket: FCBGA1744. Thermal design power (TDP): 15 Watt. Memory support: DDR5-5200, DDR4-3200, LPDDR4x-4267. Passmark benchmark score: 14,116 points. Launch price was $469.

Xeon E5-2666 V3

The Xeon E5-2666 V3 is manufactured by Intel. It was released in 2015-01-01. It is based on the Haswell-EP (2014−2015) architecture. It features 10 cores and 20 threads. Base frequency is 2.9 GHz, with boost up to 3.5 GHz. L3 cache: 25 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: LGA2011-3. Thermal design power (TDP): 135 Watt. Memory support: DDR3, DDR4 2133 MHz Quad-channel. Passmark benchmark score: 14,044 points. Launch price was $800.

⚡

Processing Power

The Core i7-1355U packs 10 cores / 12 threads, matching the Xeon E5-2666 V3's 10 cores. Boost clocks reach 5 GHz on the Core i7-1355U versus 3.5 GHz on the Xeon E5-2666 V3 — a 35.3% clock advantage for the Core i7-1355U (base: 1.7 GHz vs 2.9 GHz). The Core i7-1355U uses the Raptor Lake-U (2023) architecture (Intel 7 nm), while the Xeon E5-2666 V3 uses Haswell-EP (2014−2015) (22 nm). In PassMark, the Core i7-1355U scores 14,116 against the Xeon E5-2666 V3's 14,044 — a 0.5% lead for the Core i7-1355U. L3 cache: 12 MB (total) on the Core i7-1355U vs 25 MB (total) on the Xeon E5-2666 V3.

Feature	Core i7-1355U	Xeon E5-2666 V3
Cores / Threads	10 / 12	10 / 20
Boost Clock	5 GHz+43%	3.5 GHz
Base Clock	1.7 GHz	2.9 GHz+71%
L3 Cache	12 MB (total)	25 MB (total)+108%
L2 Cache	1.25 MB (per core)+400%	256K (per core)
Process	Intel 7 nm-68%	22 nm
Architecture	Raptor Lake-U (2023)	Haswell-EP (2014−2015)
PassMark	14,116	14,044

🧠

Memory & Platform

The Core i7-1355U uses the FCBGA1744 socket (PCIe 5.0), while the Xeon E5-2666 V3 uses LGA2011-3 (PCIe 3.0) — making them incompatible on the same motherboard.