Price drop 26%
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.
Cores 6
Threads 12
Boost Clock 3600 MHz
L3 Cache 15 MB
TDP 140 W
Socket LGA 2011-v3
60 Overall Score
Price $170
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.
Owner sentiment has held steady over time
92/100Our AI sentiment read
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 5 9600X | Dell Xeon E5-2637 V2 | be quiet! Ryzen 3 Dark Rock Pro 5 | fosa1 fosa4ycn78izud | Thermal Grizzly Ryzen 7 CSF-AM5 |
|---|---|---|---|---|---|---|
| Cores | 6 | 6 | 32 | 4 | 6 | - |
| Threads | 12 | 12 | 64 | 4 | 12 | - |
| Boost Clock Mhz | 3600 | 5400 | 3500 | 3400 | 3060 | - |
| L3 Cache Mb | 15 | 32 | 256 | 8 | 12 | - |
| Tdp W | 140 | 65 | 200 | 270 | 95 | - |
| Socket | LGA 2011-v3 | AM5 | Socket A/Socket 462 (PGA 462) | AM4 | LGA1366 | AM5 |
| Integrated Graphics | - | AMD Radeon Graphics | No | - | - | - |
| 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 5 9600X Compare | 84.8 | 93.3 | 95.1 | 79 | 94.7 | 86 | 96.5 | 96.7 |
| Dell Xeon E5-2637 V2 Compare | 99.1 | 90.7 | 76.2 | 0 | 97.3 | 99.2 | 1.5 | 89.3 |
| be quiet! Ryzen 3 Dark Rock Pro 5 Compare | 47.6 | 62.2 | 60.5 | 0 | 32.5 | 44.1 | 90.7 | 50.2 |
| fosa1 fosa4ycn78izud Compare | 25.7 | 20.1 | 64.8 | 0 | 24.5 | 24.5 | 65 | 36.1 |
| Thermal Grizzly Ryzen 7 CSF-AM5 Compare | 3.3 | 20.1 | 17.5 | 0 | 3.9 | 3.9 | 96.5 | 3.1 |
Price
Value & Pricing
From $170
Amazon 1 offer From $170
Price History
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
