Core i7-3960X vs Xeon E5-2665

Core i7-3960X

6 Cores12 Thrd130 WWMax: 3.9 GHz2011

Xeon E5-2665

8 Cores16 Thrd115 WWMax: 3.1 GHz2012

Performance Spectrum - CPU

Core i7-3960X

6 / 12

8,402

+1.3%

8,293

0.0%

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 Core i7-3960X is positioned at rank 1024 and the Xeon E5-2665 is on rank 348, so the Xeon E5-2665 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 Core i7-3960X

Ryzen 9 7950X

MSRP: $194|Avg: $20

37065%

Core i9-10900T

MSRP: $120|Avg: $5

35023%

Ryzen 3 PRO 4355GE

MSRP: $423|Avg: $5

25429%

Ryzen Threadripper 3960X

MSRP: $1399|Avg: $85

7661%

Ryzen 9 9950X

MSRP: $649|Avg: $129

6068%

Ryzen 5 8400F

MSRP: $303|Avg: $55

5308%

Ryzen 7 PRO 2700

MSRP: $299|Avg: $60

3040%

Ryzen 5 2600X

MSRP: $229|Avg: $55

3001%

Ryzen 3 PRO 5350G

MSRP: $150|Avg: $60

2732%

#10

Core Ultra 5 245KF

MSRP: $294|Avg: $189

2732%

#11

Ryzen 5 5500

MSRP: $159|Avg: $85

2701%

#12

Ryzen 5 3600

MSRP: $199|Avg: $80

2629%

#13

Core i3-9100E

MSRP: $202|Avg: $30

2592%

#14

Core Ultra 5 245K

MSRP: $319|Avg: $200

2581%

#15

Core i3-8300T

MSRP: $138|Avg: $25

2558%

#396

Ryzen Embedded R2314

MSRP: $300|Avg: $762

91%

#1024

Core i7-3960X

MSRP: $999|Avg: $60

100%

#1025

Celeron 2.70

MSRP: $49|Avg: $49

99%

#1027

A10 PRO-7850B

MSRP: $426|Avg: $140

96%

#1028

Core 2 Quad Q8200

MSRP: $224|Avg: $36

96%

#1029

A12-9800E

MSRP: $426|Avg: $150

95%

#1030

Phenom II X6 1065T

MSRP: $426|Avg: $170

95%

#1031

Celeron 440

MSRP: $59|Avg: $10

95%

#1032

A8-3820

MSRP: $280|Avg: $200

93%

#1033

Core i7-860S

MSRP: $299|Avg: $96

92%

#1035

PRO A10-8770E

MSRP: $395|Avg: $210

90%

#1036

Core 2 Duo E4700

MSRP: $133|Avg: $10

90%

#1037

Athlon 64 X2 5800+

MSRP: $230|Avg: $20

90%

#1038

Phenom II X2 B53

MSRP: $150|Avg: $15

90%

#1039

Core 2 Quad Q9300

MSRP: $266|Avg: $27

90%

Based on actual market prices and performance synthetic scores.

Performance Per Dollar Xeon E5-2665

Xeon Platinum 8454H

MSRP: $6540|Avg: N/A

5011%

Xeon Gold 6240R

MSRP: $2444|Avg: N/A

946%

#10

Xeon 6337P

MSRP: $60|Avg: $5

841%

#15

EPYC 9174F

MSRP: $194|Avg: $30

649%

#253

Xeon W-2150B

MSRP: $499|Avg: $400

99%

#255

Xeon 6517P

MSRP: $1195|Avg: $1195

99%

#348

Xeon E5-2665

MSRP: N/A|Avg: N/A

100%

#362

Xeon E5-2667 v2

MSRP: $300|Avg: $300

98%

Based on actual market prices and performance synthetic scores.

Performance Comparison

About PassMark

🏆 Chipversus Verdict

🚀 Performance Leadership

Use Case Distinction: This is a comparison between a Professional Workstation processor ($0) and a Consumer Desktop CPU. The Xeon E5-2665 is engineered for massive parallel workloads (rendering, scientific simulations), offering significantly higher core counts.

Insight	Core i7-3960X	Xeon E5-2665
Gaming	❌ Lower gaming performance	✅ Superior gaming performance
Workstation	✅ Better multi-core power	❌ Weaker in multi-core tasks
Price	⚠️ Higher cost ($60)	✅ More affordable ($0)
Longevity	🛑 Legacy (Sandy Bridge-E (2011−2013) / 32 nm)	🛑 Legacy (Sandy Bridge-EP (2012) / 32 nm)

💎 Value Proposition

The Core i7-3960X ($60), however, is optimized for mixed workloads and gaming. For most users, it offers superior single-thread performance and responsiveness at a fraction of the cost ($60 less, Infinity% cheaper), making it the better choice for daily use and gaming.

Insight	Core i7-3960X	Xeon E5-2665
Cost Efficiency	❌ Lower cost efficiency	❌ Lower cost efficiency
Upfront Cost	⚠️ Higher cost ($60)	✅ More affordable ($0)

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 i7-3960X Benchmark Check

Xeon E5-2665 Benchmark Check

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i7-3960X and Xeon E5-2665

Core i7-3960X

The Core i7-3960X is manufactured by Intel. It was released in 14 November 2011 (14 years ago). It is based on the Sandy Bridge-E (2011−2013) architecture. It features 6 cores and 12 threads. Base frequency is 3.3 GHz, with boost up to 3.9 GHz. L3 cache: 15 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA2011. Thermal design power (TDP): 130 Watt. Memory support: DDR3. Passmark benchmark score: 8,402 points. Launch price was $861.

Xeon E5-2665

The Xeon E5-2665 is manufactured by Intel. It was released in 6 March 2012 (13 years ago). It is based on the Sandy Bridge-EP (2012) architecture. It features 8 cores and 16 threads. Base frequency is 2.4 GHz, with boost up to 3.1 GHz. L3 cache: 20480 kB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA2011. Thermal design power (TDP): 115 Watt. Memory support: DDR3. Passmark benchmark score: 8,293 points. Launch price was $142.

⚡

Processing Power

The Core i7-3960X packs 6 cores / 12 threads, while the Xeon E5-2665 offers 8 cores / 16 threads — the Xeon E5-2665 has 2 more cores. Boost clocks reach 3.9 GHz on the Core i7-3960X versus 3.1 GHz on the Xeon E5-2665 — a 22.9% clock advantage for the Core i7-3960X (base: 3.3 GHz vs 2.4 GHz). The Core i7-3960X uses the Sandy Bridge-E (2011−2013) architecture (32 nm), while the Xeon E5-2665 uses Sandy Bridge-EP (2012) (32 nm). In PassMark, the Core i7-3960X scores 8,402 against the Xeon E5-2665's 8,293 — a 1.3% lead for the Core i7-3960X. L3 cache: 15 MB (total) on the Core i7-3960X vs 20480 kB (total) on the Xeon E5-2665.

Feature	Core i7-3960X	Xeon E5-2665
Cores / Threads	6 / 12	8 / 16+33%
Boost Clock	3.9 GHz+26%	3.1 GHz
Base Clock	3.3 GHz+38%	2.4 GHz
L3 Cache	15 MB (total)	20480 kB (total)+33%
L2 Cache	256 kB (per core)	256 kB (per core)
Process	32 nm	32 nm
Architecture	Sandy Bridge-E (2011−2013)	Sandy Bridge-EP (2012)
PassMark	8,402+1%	8,293
Geekbench 6 Single	658	—
Geekbench 6 Multi	4,973	—

🧠

Memory & Platform

Both processors use the LGA2011 socket with PCIe 2.0. Both support up to DDR3-1600 memory speed. The Xeon E5-2665 supports up to 384 GB of RAM compared to 64 GB — 142.9% more capacity for professional workloads. Both feature 4-channel memory with ECC support. Both provide 40 PCIe lanes.

Feature	Core i7-3960X	Xeon E5-2665
Socket	LGA2011	LGA2011
PCIe Generation	PCIe 2.0	PCIe 5.0+150%
Max RAM Speed	DDR3-1600	DDR3-1600
Max RAM Capacity	64 GB	384 GB+500%
RAM Channels	4	4
ECC Support	❌	✅
PCIe Lanes	40	40

🔧

Advanced Features

Only the Xeon E5-2665 supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: Yes (Core i7-3960X) vs VT-x, VT-d (Xeon E5-2665). Primary use case: Xeon E5-2665 targets Server.