Xeon Gold 6126 vs Core Ultra 7 255U

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 Gold 6126

#106

Xeon Gold 6143

MSRP: $342|Avg: $342

104%

#115

Xeon W-1370

MSRP: $323|Avg: $323

102%

#117

Xeon Gold 6126

MSRP: N/A|Avg: N/A

100%

#119

Xeon 6505P

MSRP: $563|Avg: $563

100%

#130

EPYC 9115

MSRP: $726|Avg: $726

95%

#131

EPYC 74F3

MSRP: $913|Avg: $824

95%

Based on actual market prices and performance synthetic scores.

Performance Per Dollar Core Ultra 7 255U

#161

Core Ultra 7 268V

MSRP: $450|Avg: $400

110%

#162

Core Ultra 7 256V

MSRP: $450|Avg: $350

110%

#167

Core Ultra 7 258V

MSRP: $450|Avg: $400

106%

#169

Core i7-1280P

MSRP: $482|Avg: $482

105%

#173

Core Ultra 5 238V

MSRP: $454|Avg: $454

101%

#175

Core Ultra 7 255U

MSRP: N/A|Avg: N/A

100%

#176

Core i9-13900HK

MSRP: $697|Avg: N/A

99%

#178

Core i7-1360P

MSRP: $480|Avg: $280

97%

#179

Core i7-1260P

MSRP: $432|Avg: $432

97%

#184

Core Ultra 7 266V

MSRP: $520|Avg: $520

94%

#185

Ryzen 7 5825C

MSRP: $400|Avg: $400

92%

#187

Core Ultra 9 288V

MSRP: $600|Avg: $600

85%

#188

Core i7-10870H

MSRP: $417|Avg: N/A

85%

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 Ultra 7 255U (2025) utilizes 5 nm technology and DDR5, providing a fundamental performance advantage.

Insight	Xeon Gold 6126	Core Ultra 7 255U
Gaming	❌ Lower gaming performance	✅ Superior gaming performance
Workstation	❌ Weaker in multi-core tasks	✅ Better multi-core power
Price	Equivalent pricing	Equivalent pricing
Longevity	✨ Modern (Skylake (server) (2017−2018) / 14 nm)	✨ Modern (Arrow Lake-U (2025) / 5 nm)

💎 Value Proposition

The Xeon Gold 6126 (2017) relies on 14 nm technology and DDR4-2666, placing it in a different performance category relative to modern standards.

Insight	Xeon Gold 6126	Core Ultra 7 255U
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 Gold 6126 Benchmark Check

Core Ultra 7 255U Benchmark Check

Technical Specifications

Side-by-side comparison of Xeon Gold 6126 and Core Ultra 7 255U

Xeon Gold 6126

The Xeon Gold 6126 is manufactured by Intel. It was released in 25 April 2017 (8 years ago). It is based on the Skylake (server) (2017−2018) architecture. It features 12 cores and 24 threads. Base frequency is 2.6 GHz, with boost up to 3.7 GHz. L3 cache: 19.25 MB. L2 cache: 12 MB. Built on 14 nm process technology. Socket: LGA3647. Thermal design power (TDP): 125 Watt. Memory support: DDR4-2666. Passmark benchmark score: 17,492 points. Launch price was $1,776.

Core Ultra 7 255U

The Core Ultra 7 255U is manufactured by Intel. It was released in 1 January 2025 (less than a year ago). It is based on the Arrow Lake-U (2025) architecture. It features 12 cores and 14 threads. Base frequency is 3.8 GHz, with boost up to 5.2 GHz. L3 cache: 12 MB. Built on 5 nm process technology. Socket: FCBGA2049. Thermal design power (TDP): 14 MB + 12 MB. Memory support: DDR5. Passmark benchmark score: 17,834 points. Launch price was $299.

⚡

Processing Power

The Xeon Gold 6126 packs 12 cores / 24 threads, matching the Core Ultra 7 255U's 12 cores. Boost clocks reach 3.7 GHz on the Xeon Gold 6126 versus 5.2 GHz on the Core Ultra 7 255U — a 33.7% clock advantage for the Core Ultra 7 255U (base: 2.6 GHz vs 3.8 GHz). The Xeon Gold 6126 uses the Skylake (server) (2017−2018) architecture (14 nm), while the Core Ultra 7 255U uses Arrow Lake-U (2025) (5 nm). In PassMark, the Xeon Gold 6126 scores 17,492 against the Core Ultra 7 255U's 17,834 — a 1.9% lead for the Core Ultra 7 255U. L3 cache: 19.25 MB on the Xeon Gold 6126 vs 12 MB on the Core Ultra 7 255U.

Feature	Xeon Gold 6126	Core Ultra 7 255U
Cores / Threads	12 / 24	12 / 14
Boost Clock	3.7 GHz	5.2 GHz+41%
Base Clock	2.6 GHz	3.8 GHz+46%
L3 Cache	19.25 MB+60%	12 MB
L2 Cache	12 MB	—
Process	14 nm	5 nm-64%
Architecture	Skylake (server) (2017−2018)	Arrow Lake-U (2025)
PassMark	17,492	17,834+2%

🧠

Memory & Platform

The Xeon Gold 6126 uses the LGA3647 socket (PCIe 3.0), while the Core Ultra 7 255U uses FCBGA2049 (PCIe 5.0) — making them incompatible on the same motherboard.