Core i5-8365UE vs Core i5-6400

Core i5-8365UE

4 Cores8 Thrd15 WWMax: 4.1 GHz2019

Core i5-6400

4 Cores4 Thrd65 WWMax: 3.3 GHz2015

Performance Spectrum - CPU

Core i5-8365UE

4 / 8

5,435

+0.3%

5,417

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 i5-8365UE is positioned at rank 919 and the Core i5-6400 is on rank 600, so the Core i5-6400 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 i5-8365UE

#907

Atom x5-Z8300

MSRP: $20|Avg: N/A

1603%

#908

Atom Z3735G

MSRP: $17|Avg: N/A

1580%

#909

Core i5-480M

MSRP: $81|Avg: $77

1450%

#910

Core i5-460M

MSRP: $80|Avg: $129

1444%

#911

Core i5-2540M

MSRP: $266|Avg: $10

1430%

#913

Core i5-450M

MSRP: $32|Avg: $31

1381%

#914

Core i3-380M

MSRP: $49|Avg: $25

1325%

#915

Core i5-430M

MSRP: N/A|Avg: $33

1322%

#916

Core 2 Duo T6600

MSRP: N/A|Avg: $4

1287%

#919

Core i5-8365UE

MSRP: $297|Avg: $297

100%

#921

A6 Pro-7050B

MSRP: $100|Avg: $15

99%

#923

Athlon II N370

MSRP: $60|Avg: $10

99%

#928

A8-6410

MSRP: $100|Avg: $40

97%

#933

Athlon X2 L310

MSRP: $100|Avg: $20

95%

Based on actual market prices and performance synthetic scores.

Performance Per Dollar Core i5-6400

Ryzen 9 7950X

MSRP: $194|Avg: $20

10474%

Core i9-10900T

MSRP: $120|Avg: $5

9897%

Ryzen 3 PRO 4355GE

MSRP: $423|Avg: $5

7186%

Ryzen Threadripper 3960X

MSRP: $1399|Avg: $85

2165%

Ryzen 9 9950X

MSRP: $649|Avg: $129

1715%

Ryzen 5 8400F

MSRP: $303|Avg: $55

1500%

Ryzen 7 PRO 2700

MSRP: $299|Avg: $60

859%

Ryzen 5 2600X

MSRP: $229|Avg: $55

848%

Ryzen 3 PRO 5350G

MSRP: $150|Avg: $60

772%

#10

Core Ultra 5 245KF

MSRP: $294|Avg: $189

772%

#11

Ryzen 5 5500

MSRP: $159|Avg: $85

763%

#12

Ryzen 5 3600

MSRP: $199|Avg: $80

743%

#13

Core i3-9100E

MSRP: $202|Avg: $30

732%

#14

Core Ultra 5 245K

MSRP: $319|Avg: $200

729%

#15

Core i3-8300T

MSRP: $138|Avg: $25

723%

#279

Ryzen Threadripper 1920X

MSRP: $799|Avg: $265

97%

#280

Core i7-7820X

MSRP: $599|Avg: $198

96%

#600

Core i5-6400

MSRP: $182|Avg: $57

100%

#602

Pentium G3460T

MSRP: $69|Avg: N/A

99%

#603

Core i3-6300

MSRP: $147|Avg: $99

99%

#604

Core i5-6402P

MSRP: $182|Avg: $120

99%

#605

Athlon II X4 620e

MSRP: $99|Avg: $40

99%

#606

Core i5-7600

MSRP: $224|Avg: $114

99%

#608

FX-9590

MSRP: $350|Avg: $100

98%

#611

Athlon X4 750

MSRP: $95|Avg: $95

97%

#613

A6-3600

MSRP: $95|Avg: $25

96%

#614

Core i7-7740X

MSRP: $339|Avg: $150

96%

#615

Core i3-4130

MSRP: $117|Avg: $55

96%

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 i5-8365UE (2019) utilizes 14 nm technology and DDR4, providing a fundamental performance advantage.

Insight	Core i5-8365UE	Core i5-6400
Gaming	✅ Superior gaming performance	❌ Lower gaming performance
Workstation	✅ Better multi-core power	❌ Weaker in multi-core tasks
Price	⚠️ Higher cost ($297)	✅ More affordable ($57)
Longevity	✨ Modern (Whiskey Lake-U (2018−2019) / 14 nm)	🛑 Legacy (Skylake (2015−2016) / 14 nm)

💎 Value Proposition

The Core i5-6400 (2015) relies on 14 nm technology and DDR3, DDR4, placing it in a different performance category relative to modern standards.

Insight	Core i5-8365UE	Core i5-6400
Cost Efficiency	❌ Lower cost efficiency	✅ Better overall value (+419%)
Upfront Cost	⚠️ Higher cost ($297)	✅ More affordable ($57)

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 i5-8365UE Benchmark Check

Core i5-6400 Benchmark Check

Technical Specifications

Side-by-side comparison of Core i5-8365UE and Core i5-6400

Core i5-8365UE

The Core i5-8365UE is manufactured by Intel. It was released in 16 April 2019 (6 years ago). It is based on the Whiskey Lake-U (2018−2019) architecture. It features 4 cores and 8 threads. Base frequency is 1.6 GHz, with boost up to 4.1 GHz. L3 cache: 6 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: FCBGA1528. Thermal design power (TDP): 15 Watt. Memory support: DDR4. Passmark benchmark score: 5,435 points. Launch price was $297.

Core i5-6400

The Core i5-6400 is manufactured by Intel. It was released in 2 July 2015 (10 years ago). It is based on the Skylake (2015−2016) architecture. It features 4 cores and 4 threads. Base frequency is 2.7 GHz, with boost up to 3.3 GHz. L3 cache: 6 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 65 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 5,417 points. Launch price was $187.

⚡

Processing Power

The Core i5-8365UE packs 4 cores / 8 threads, matching the Core i5-6400's 4 cores. Boost clocks reach 4.1 GHz on the Core i5-8365UE versus 3.3 GHz on the Core i5-6400 — a 21.6% clock advantage for the Core i5-8365UE (base: 1.6 GHz vs 2.7 GHz). The Core i5-8365UE uses the Whiskey Lake-U (2018−2019) architecture (14 nm), while the Core i5-6400 uses Skylake (2015−2016) (14 nm). In PassMark, the Core i5-8365UE scores 5,435 against the Core i5-6400's 5,417 — a 0.3% lead for the Core i5-8365UE. Both processors carry 6 MB (total) of L3 cache.

Feature	Core i5-8365UE	Core i5-6400
Cores / Threads	4 / 8	4 / 4
Boost Clock	4.1 GHz+24%	3.3 GHz
Base Clock	1.6 GHz	2.7 GHz+69%
L3 Cache	6 MB (total)	6 MB (total)
L2 Cache	256 kB (per core)	256K (per core)
Process	14 nm	14 nm
Architecture	Whiskey Lake-U (2018−2019)	Skylake (2015−2016)
PassMark	5,435	5,417
Geekbench 6 Single	—	950
Geekbench 6 Multi	—	3,200

🧠

Memory & Platform

The Core i5-8365UE uses the FCBGA1528 socket (PCIe 3.0), while the Core i5-6400 uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Core i5-8365UE	Core i5-6400
Socket	FCBGA1528	LGA1151
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	—	DDR4-2133
Max RAM Capacity	—	64 GB
RAM Channels	—	2
ECC Support	—	❌
PCIe Lanes	—	16

🔧

Advanced Features

Virtualization: not specified (Core i5-8365UE) / VT-x, VT-d, EPT (Core i5-6400). The Core i5-6400 includes integrated graphics (Intel HD Graphics 530), while the Core i5-8365UE requires a dedicated GPU. Primary use case: Core i5-6400 targets Mainstream Desktop.

Feature	Core i5-8365UE	Core i5-6400
Integrated GPU	—	Yes
IGPU Model	—	Intel HD Graphics 530
Unlocked	—	No
AVX-512	—	No
Virtualization	—	VT-x, VT-d, EPT
Target Use	—	Mainstream Desktop

💰

Value Analysis

The Core i5-8365UE launched at $297 MSRP, while the Core i5-6400 debuted at $182. At current prices ($297 vs $57), the Core i5-6400 is $240 cheaper. In terms of value (PassMark points per dollar), the Core i5-8365UE delivers 18.3 pts/$ vs 95.0 pts/$ for the Core i5-6400 — making the Core i5-6400 the 135.4% better value option.