Core i5-8259U vs Core i5-9400H
Core i5-8259U
Core i5-9400H
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 i5-8259U is positioned at rank 209 and the Core i5-9400H is on rank 421, so the Core i5-8259U offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Core i5-8259U
Performance Per Dollar Core i5-9400H
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i5-8259U | Core i5-9400H |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($182) |
| Longevity | ✨ Modern (Coffee Lake-U (2018−2019) / 14 nm) | ✨ Modern (Coffee Lake-H (2018−2019) / 14 nm) |
💎 Value Proposition
| Insight | Core i5-8259U | Core i5-9400H |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($182) |
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 i5-8259U and Core i5-9400H
Core i5-8259U
The Core i5-8259U is manufactured by Intel. It was released in 5 April 2018 (7 years ago). It is based on the Coffee Lake-U (2018−2019) architecture. It features 4 cores and 8 threads. Base frequency is 2.3 GHz, with boost up to 3.8 GHz. L3 cache: 6 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: FCBGA1528. Thermal design power (TDP): 28 Watt. Memory support: DDR4. Passmark benchmark score: 7,843 points. Launch price was $320.
Core i5-9400H
The Core i5-9400H is manufactured by Intel. It was released in 23 April 2019 (6 years ago). It is based on the Coffee Lake-H (2018−2019) architecture. It features 4 cores and 8 threads. Base frequency is 2.5 GHz, with boost up to 4.3 GHz. L3 cache: 8 MB. L2 cache: 1 MB. Built on 14 nm process technology. Socket: BGA1440. Thermal design power (TDP): 45 Watt. Memory support: DDR4. Passmark benchmark score: 7,794 points. Launch price was $149.
Processing Power
Both the Core i5-8259U and Core i5-9400H share an identical 4-core/8-thread configuration. Boost clocks reach 3.8 GHz on the Core i5-8259U versus 4.3 GHz on the Core i5-9400H — a 12.3% clock advantage for the Core i5-9400H (base: 2.3 GHz vs 2.5 GHz). The Core i5-8259U uses the Coffee Lake-U (2018−2019) architecture (14 nm), while the Core i5-9400H uses Coffee Lake-H (2018−2019) (14 nm). In PassMark, the Core i5-8259U scores 7,843 against the Core i5-9400H's 7,794 — a 0.6% lead for the Core i5-8259U. L3 cache: 6 MB (total) on the Core i5-8259U vs 8 MB on the Core i5-9400H.
| Feature | Core i5-8259U | Core i5-9400H |
|---|---|---|
| Cores / Threads | 4 / 8 | 4 / 8 |
| Boost Clock | 3.8 GHz | 4.3 GHz+13% |
| Base Clock | 2.3 GHz | 2.5 GHz+9% |
| L3 Cache | 6 MB (total) | 8 MB+33% |
| L2 Cache | 256K (per core) | 1 MB+300% |
| Process | 14 nm | 14 nm |
| Architecture | Coffee Lake-U (2018−2019) | Coffee Lake-H (2018−2019) |
| PassMark | 7,843 | 7,794 |
| Geekbench 6 Single | — | 1,341 |
Memory & Platform
The Core i5-8259U uses the FCBGA1528 socket (PCIe 3.0), while the Core i5-9400H uses BGA1440 (PCIe 3.0) — making them incompatible on the same motherboard.
| Feature | Core i5-8259U | Core i5-9400H |
|---|---|---|
| Socket | FCBGA1528 | BGA1440 |
| PCIe Generation | PCIe 3.0 | PCIe 3.0 |
| Max RAM Speed | — | DDR4-2666 |
| Max RAM Capacity | — | 128 GB |
| RAM Channels | — | 2 |
| ECC Support | — | ❌ |
| PCIe Lanes | — | 16 |
Advanced Features
Virtualization: not specified (Core i5-8259U) / VT-x, VT-d, EPT (Core i5-9400H). The Core i5-9400H includes integrated graphics (UHD Graphics 630), while the Core i5-8259U requires a dedicated GPU. Primary use case: Core i5-9400H targets High Performance Laptop. Direct competitor: Core i5-9400H rivals Ryzen 5 4600H.
| Feature | Core i5-8259U | Core i5-9400H |
|---|---|---|
| Integrated GPU | — | Yes |
| IGPU Model | — | UHD Graphics 630 |
| Unlocked | — | No |
| AVX-512 | — | No |
| Virtualization | — | VT-x, VT-d, EPT |
| Target Use | — | High Performance Laptop |
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The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
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