Intel Core i5-10400 vs Intel Core i7-5820K
30.4Single-core20.7
32.2Multi-core30.2
36Gaming37.1
10 spec wins — Intel Core i5-104006 spec wins — Intel Core i7-5820K
InnoReviews verdict
Intel Core i5-10400 wins this desktop processor face-off, 32.6 to 29.1, pulling ahead mainly in Single-core (+10) and Multi-core (+2). Intel Core i7-5820K still makes sense if its price or standout specs fit your needs better.
Which would you pick?
Key differences
Reasons to pick the Intel Core i5-10400
- Stronger Single-core score: 30 vs 21
- 100% higher Max memory: 128 GB vs 64 GB
- 54% lower Base TDP: 65 W vs 140 W
- 36% lower process: 14 nm vs 22 nm
- 34% higher Geekbench 6 (single): 1,390 vs 1,040
- Lower launch price: $182 vs $389
Reasons to pick the Intel Core i7-5820K
- 100% higher Memory channels: 4 vs 2
- 75% higher CPU PCIe lanes: 28 vs 16
- 25% higher L3 cache: 15 MB vs 12 MB
- 14% higher Base clock: 3.3 GHz vs 2.9 GHz
- Has Unlocked multiplier — the other doesn't
General
| Spec | Intel Core i5-10400 | Intel Core i7-5820K |
|---|---|---|
| Announced | 2020 | 2014 |
| Socket | LGA1200 | LGA2011-v3 |
| Process | 14 nm+36% | 22 nm |
| Base TDP | 65 W+54% | 140 W |
| Max turbo power | 134 W | — |
| Unlocked multiplier | No | Yes |
| Cooler included | Yes | No |
Cores & Clocks
| Spec | Intel Core i5-10400 | Intel Core i7-5820K |
|---|---|---|
| Cores | 6 | 6 |
| Performance cores | 6 | 6 |
| Efficiency cores | 0 | 0 |
| Threads | 12 | 12 |
| Base clock | 2.9 GHz | 3.3 GHz+14% |
| Boost clock | 4.3 GHz+19% | 3.6 GHz |
| L2 cache | 2 MB | 2 MB |
| L3 cache | 12 MB | 15 MB+25% |
Integrated GPU
| Spec | Intel Core i5-10400 | Intel Core i7-5820K |
|---|---|---|
| iGPU | Intel UHD Graphics 630 | — |
| iGPU clock | 1,100 MHz | — |
Memory
| Spec | Intel Core i5-10400 | Intel Core i7-5820K |
|---|---|---|
| Memory support | DDR4-2666 | DDR4-2133 |
| Max memory | 128 GB+100% | 64 GB |
| Memory channels | 2 | 4+100% |
Platform
| Spec | Intel Core i5-10400 | Intel Core i7-5820K |
|---|---|---|
| PCIe version | 3 | 3 |
| CPU PCIe lanes | 16 | 28+75% |
Benchmarks
| Spec | Intel Core i5-10400 | Intel Core i7-5820K |
|---|---|---|
| Geekbench 6 (single) | 1,390+34%Top 73% | 1,040Top 95% |
| Geekbench 6 (multi) | 5,800+14%Top 70% | 5,100Top 73% |
| Cinebench R23 (single) | 1,100+24%Top 80% | 890Top 96% |
| Cinebench R23 (multi) | 8,000+25%Top 71% | 6,400Top 77% |
| PassMark | 12,600Top 73% | 12,700+1%Top 72% |
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