CPU
GPU
Core i5-6400
Core i5-8365UE
Performance Spectrum - CPU
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 i5-6400 is positioned at rank 600 and the Core i5-8365UE is on rank 919, so the Core i5-6400 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Core i5-6400
Performance Per Dollar Core i5-8365UE
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i5-6400 | Core i5-8365UE |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($57) | ⚠️ Higher cost ($297) |
| Longevity | 🛑 Legacy (Skylake (2015−2016) / 14 nm) | ✨ Modern (Whiskey Lake-U (2018−2019) / 14 nm) |
💎 Value Proposition
| Insight | Core i5-6400 | Core i5-8365UE |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+419%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($57) | ⚠️ Higher cost ($297) |
Performance Check
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.
Technical Specifications
Side-by-side comparison of Core i5-6400 and Core i5-8365UE
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.
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.
Processing Power
The Core i5-6400 packs 4 cores / 4 threads, matching the Core i5-8365UE's 4 cores. Boost clocks reach 3.3 GHz on the Core i5-6400 versus 4.1 GHz on the Core i5-8365UE — a 21.6% clock advantage for the Core i5-8365UE (base: 2.7 GHz vs 1.6 GHz). The Core i5-6400 uses the Skylake (2015−2016) architecture (14 nm), while the Core i5-8365UE uses Whiskey Lake-U (2018−2019) (14 nm). In PassMark, the Core i5-6400 scores 5,417 against the Core i5-8365UE's 5,435 — a 0.3% lead for the Core i5-8365UE. Both processors carry 6 MB (total) of L3 cache.
| Feature | Core i5-6400 | Core i5-8365UE |
|---|---|---|
| Cores / Threads | 4 / 4 | 4 / 8 |
| Boost Clock | 3.3 GHz | 4.1 GHz+24% |
| Base Clock | 2.7 GHz+69% | 1.6 GHz |
| L3 Cache | 6 MB (total) | 6 MB (total) |
| L2 Cache | 256K (per core) | 256 kB (per core) |
| Process | 14 nm | 14 nm |
| Architecture | Skylake (2015−2016) | Whiskey Lake-U (2018−2019) |
| PassMark | 5,417 | 5,435 |
| Geekbench 6 Single | 950 | — |
| Geekbench 6 Multi | 3,200 | — |
Memory & Platform
The Core i5-6400 uses the LGA1151 socket (PCIe 3.0), while the Core i5-8365UE uses FCBGA1528 (PCIe 3.0) — making them incompatible on the same motherboard.
| Feature | Core i5-6400 | Core i5-8365UE |
|---|---|---|
| Socket | LGA1151 | FCBGA1528 |
| 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: VT-x, VT-d, EPT (Core i5-6400) / not specified (Core i5-8365UE). 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 i5-6400 | Core i5-8365UE |
|---|---|---|
| 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 i5-6400 launched at $182 MSRP, while the Core i5-8365UE debuted at $297. At current prices ($57 vs $297), the Core i5-6400 is $240 cheaper. In terms of value (PassMark points per dollar), the Core i5-6400 delivers 95.0 pts/$ vs 18.3 pts/$ for the Core i5-8365UE — making the Core i5-6400 the 135.4% better value option.
| Feature | Core i5-6400 | Core i5-8365UE |
|---|---|---|
| MSRP | $182-39% | $297 |
| Avg Price (30d) | $57-81% | $297 |
| Performance per Dollar | 95.0+419% | 18.3 |
| Release Date | 2015 | 2019 |
Top Performing CPUs
The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
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