Intel Core i7 5820K 6-core LGA2011
The 22nm Haswell-E architecture delivers 6 cores and 12 threads with a 3.6GHz boost clock, supported by a substantial 15MB L3 cache for demanding multitasking. Its unlocked multiplier and quad-channel DDR4 memory support on the LGA 2011-v3 socket provide strong overclocking headroom for its era. This processor is best for budget-conscious PC builders seeking a used 6-core chip for older workstation tasks and entry-level content creation.
Snapshot
Pros & Cons
Pros
- Strong social proof (97th percentile) 97th
- Strong user sentiment (93rd percentile) 93rd
- Strong platform (80th percentile) 80th
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 41 dated customer reviews, grouped by calendar quarter. Period analysis is in English.
The proof
Performance
Specifications
Full Specifications
Processor
| Brand | Intel |
| Series | Core i7 |
| Model | 5820K |
| Codename | Haswell-E |
| Class | desktop |
| Process | 22 |
Cores & Clocks
| Cores | 6 |
| Threads | 12 |
| Base Clock | 3300 |
| Boost Clock | 3600 |
Cache
| L2 Cache | 1.5 |
| L3 Cache | 15 MB |
Performance
| PassMark Multi | 9830 |
| PassMark Single | 1991 |
Memory
| Memory Type | DDR4 |
| Max Speed | 3200 |
| Channels | 4 |
| Max Memory | 64 |
| ECC | No |
Platform & Power
| Socket | LGA 2011-v3 |
| PCIe | 3 |
| PCIe Lanes | 28 |
| TDP | 140 |
| Unlocked | Yes |
vs Competition
| Spec | Intel Core i7 5820K | AMD Ryzen 7 9800X3D | G.Skill Trident Z Neo | WowWee Xeon Gold 5120 | be quiet! Ryzen 3 Dark Rock Pro 5 | CISCO SYSTEMS - ENTERPRISE Xeon E5-2699v4 |
|---|---|---|---|---|---|---|
| Cores | 6 | 8 | 6 | 14 | 4 | 22 |
| Threads | 12 | 16 | 12 | 28 | 4 | 12 |
| Boost Clock Mhz | 3600 | 5200 | 4200 | 3200 | 3400 | 3600 |
| L3 Cache Mb | 15 | 96 | 32 | 19.25 | 8 | 39 |
| Tdp W | 140 | 120 | 65 | 105 | 270 | - |
| Socket | LGA 2011-v3 | AM5 | AMD Socket AM4 | LGA 3647 | AM4 | LGA2011-3 |
| Integrated Graphics | - | AMD Radeon Graphics | - | - | - | - |
| Compare | Compare | Compare | Compare | Compare |
| Product | AI | Feature | Platform | User Sentiment | Efficiency | Multi Thread | Social Proof | Single Thread |
|---|---|---|---|---|---|---|---|---|
| Intel Core i7 5820K | 61.5 | 62.2 | 79.9 | 92.6 | 47.1 | 61.6 | 96.5 | 52.7 |
| AMD Ryzen 7 9800X3D Compare | 91.2 | 98.4 | 95.1 | 92.6 | 87.5 | 90 | 96.5 | 95.6 |
| 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 |
| CISCO SYSTEMS - ENTERPRISE Xeon E5-2699v4 Compare | 44.2 | 46.1 | 17.5 | 0 | 29.7 | 52.4 | 51.2 | 9.9 |
Price
Value & Pricing
Amazon 1 offer From €207
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.
