Intel Core i5 8400 6-core LGA1151
The 6-core, 6-thread Coffee Lake architecture with a 4.0GHz boost clock delivers strong multi-threaded efficiency for its 65W TDP class. It includes a boxed cooler and integrated UHD Graphics 630, making it a cost-effective foundation for a basic system without a discrete GPU. This processor is best for office productivity users and home theater PC builders who need reliable, moderate performance on a tight budget.
No current retailer price
Snapshot
Pros & Cons
Pros
- Strong social proof (91st percentile) 91st
- Strong platform (68th percentile) 68th
- Strong efficiency (66th percentile) 66th
- Strong single thread (66th percentile) 66th
Cons
What owners think
How owner sentiment changed over time
ExclusiveBased on when customers actually wrote their reviews - so you can see whether early praise held up.
Based on 6 dated customer reviews, grouped by calendar quarter. Period analysis is in English.
The proof
Performance
Specifications
Full Specifications
Processor
| Brand | Intel |
| Series | Core i5 |
| Model | 8400 |
| Codename | Coffee Lake |
| Class | desktop |
| Process | 14 |
Cores & Clocks
| Cores | 6 |
| Threads | 6 |
| Base Clock | 2800 |
| Boost Clock | 4000 |
Cache
| L2 Cache | 1.5 |
| L3 Cache | 9 MB |
Performance
| PassMark Multi | 9232 |
| PassMark Single | 2365 |
Memory
| Memory Type | DDR4 |
| Max Speed | 2666 |
| Channels | 2 |
| Max Memory | 128 |
| ECC | No |
Platform & Power
| Socket | LGA 1151 |
| PCIe | 3 |
| PCIe Lanes | 16 |
| TDP | 65 |
| Max Turbo Power | 65 |
| Unlocked | No |
Graphics & AI
| Integrated Graphics | Intel UHD Graphics 630 |
vs Competition
| Spec | Intel Core i5 8400 | AMD Ryzen 7 9800X3D | Dell Xeon E5-2637 V2 | G.Skill Trident Z Neo | WowWee Xeon Gold 5120 | be quiet! Ryzen 3 Dark Rock Pro 5 |
|---|---|---|---|---|---|---|
| Cores | 6 | 8 | 32 | 6 | 14 | 4 |
| Threads | 6 | 16 | 64 | 12 | 28 | 4 |
| Boost Clock Mhz | 4000 | 5200 | 3500 | 4200 | 3200 | 3400 |
| L3 Cache Mb | 9 | 96 | 256 | 32 | 19.25 | 8 |
| Tdp W | 65 | 120 | 200 | 65 | 105 | 270 |
| Socket | LGA 1151 | AM5 | Socket A/Socket 462 (PGA 462) | AMD Socket AM4 | LGA 3647 | AM4 |
| Integrated Graphics | Intel UHD Graphics 630 | AMD Radeon Graphics | No | - | - | - |
| Compare | Compare | Compare | Compare | Compare |
| Product | AI | Feature | Platform | User Sentiment | Efficiency | Multi Thread | Social Proof | Single Thread |
|---|---|---|---|---|---|---|---|---|
| Intel Core i5 8400 | 62.8 | 54.4 | 68.3 | 64 | 66.4 | 60 | 90.7 | 66.4 |
| AMD Ryzen 7 9800X3D Compare | 91.2 | 98.4 | 95.1 | 92.6 | 87.5 | 90 | 96.5 | 95.6 |
| Dell Xeon E5-2637 V2 Compare | 99.1 | 90.7 | 76.2 | 0 | 97.3 | 99.2 | 1.5 | 89.3 |
| G.Skill Trident Z Neo Compare | 72.4 | 87 | 78.2 | 0 | 82.9 | 73.4 | 1.5 | 72.3 |
| WowWee Xeon Gold 5120 Compare | 73.7 | 20.1 | 17.5 | 0 | 72.6 | 74.3 | 38.3 | 44.2 |
| be quiet! Ryzen 3 Dark Rock Pro 5 Compare | 47.6 | 62.2 | 60.5 | 0 | 32.5 | 44.1 | 90.7 | 50.2 |
Price
Value & Pricing
We started tracking prices for this product on Jun 13, 2026. The chart appears once we have more data.
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
