| Product | Core i7-5820K | Core i9-7900X X-series |
| Brand | Intel | Intel |
| Street Price (Approx) | ~ $384 Search low Core i7-5820K price (Amazon) | ~ $920 Search low Core i9-7900X X-series price (Amazon) |
| # CPU Cores | 6 | 10 |
| Frequency (GHz) | 3.3 GHz | 3.3 GHz |
| Cache (MB) | 15 | 13.75 |
| TDP (Watts) | 140 W | 140 W |
| Product Segment | Desktop | Desktop |
| Status | Released | Released |
| Announced On | 2014-06-01 | 2017-03-01 |
| Technicals | Core i7-5820K | Core i9-7900X X-series |
| Dimensions (2D) | 52.5x52.5 mm | |
| Conflict Free? | 1 | 1 |
| # CPU Cores | 6 | 10 |
| Threads/Core | 12 | 20 |
| Frequency (GHz) | 3.3 GHz | 3.3 GHz |
| Turbo Frequency (GHz) | 3.6 GHz | 4.3 GHz |
| Cache (MB) | 15 | 13.75 |
| Instructions Width (bits) | 64 | 64 |
| Instructions Extensions | SSE4.2, AVX 2.0, AES | SSE4.1/4.2, AVX 2.0, AVX-512 |
| Lithography Process (nm) | 22 nm | 14 nm |
| TDP (Watts) | 140 W | 140 W |
| Max RAM | 64 GB | 128 GB |
| RAM Types | DDR4 1333/1600/2133 | DDR4-2666 |
| # Memory Channels | 4 | 4 |
| Memory Bandwidth (GB/Sec) | 68GB/s | |
| Max CPU / Package | 1 | 1 |
| PCI-E Version | 3 | 3 |
| PCI-E Max Lanes # | 28 | 44 |
| Compatible Sockets | LGA2011-v3 | FCLGA2066 |
| Intel Turbo Boost Version | 2 | 2 |
| Intel V-Pro | No | |
| Intel Hyper-Thread | Yes | Yes |
| Intel Virtualization (VTX) | Yes | Yes |
| Intel Directed I/O (VTD) | Yes | Yes |
| Intel Ext. Page Tables (EPT) | Yes | |
| Intel 64 | Yes | Yes |
| Idle States | Yes | |
| Enhanced Speedstep | Yes | |
| Thermal MonitoringTech. | Yes | |
| Intel ID Protect | Yes | |
| Smart Response Technology | Yes | |
| Intel AES New Instructions | Yes | Yes |
| Trusted Execution | No | |
| Execution Disable | Yes | Yes |