Xeon E5-2666 V3 vs Core i7-1355U

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

Xeon E5-2666 V3 Benchmark Check

Core i7-1355U Benchmark Check

Technical Specifications

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

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.

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.

⚡

Processing Power

The Xeon E5-2666 V3 packs 10 cores / 20 threads, matching the Core i7-1355U's 10 cores. Boost clocks reach 3.5 GHz on the Xeon E5-2666 V3 versus 5 GHz on the Core i7-1355U — a 35.3% clock advantage for the Core i7-1355U (base: 2.9 GHz vs 1.7 GHz). The Xeon E5-2666 V3 uses the Haswell-EP (2014−2015) architecture (22 nm), while the Core i7-1355U uses Raptor Lake-U (2023) (Intel 7 nm). In PassMark, the Xeon E5-2666 V3 scores 14,044 against the Core i7-1355U's 14,116 — a 0.5% lead for the Core i7-1355U. L3 cache: 25 MB (total) on the Xeon E5-2666 V3 vs 12 MB (total) on the Core i7-1355U.

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

🧠

Memory & Platform

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