Intel Xeon X5667 vs Intel Xeon E6540: comparison
Comparison of Intel Xeon X5667 and Intel Xeon E6540: key differences and a full specification table.
Key differences
Intel Xeon X5667 has a higher base clock (3.06 GHz vs 2 GHz), a higher maximum clock (3.46 GHz vs 2.27 GHz), a lower TDP (95 W vs 105 W) and a finer process node (32 nm vs 45 nm).
At the same time, Intel Xeon E6540 has more cores (6 vs 4), more threads (12 vs 8) and a larger L3 cache (18 MB vs 12 MB).
These are specification values: they show differences between the models but do not determine a performance winner. For a specific workload, rely on independent benchmarks.
Key specifications
| Parameter | Intel Xeon X5667 | Intel Xeon E6540 |
|---|---|---|
| Cores / threads | 4 / 8 | 6 / 12 |
| Max boost clock | 3.46 GHz | 2.27 GHz |
| L3 cache | 12 MB | 18 MB |
| TDP | 95 W | 105 W |
| Process | 32 nm | 45 nm |
Full specification table
Differing values are highlighted. This is not a better/worse rating: numbers from different architectures are not always comparable.
| Parameter | Intel Xeon X5667 | Intel Xeon E6540 |
|---|---|---|
| General | ||
| Model | X5667 | E6540 |
| Codename | Westmere EP | Nehalem EX |
| Segment | Server | Server |
| Product line | Устаревшие процессоры Intel Xeon | Устаревшие процессоры Intel Xeon |
| Process | 32 nm | 45 nm |
| Launch date | Q1 2010 | Q1 2010 |
| Status | Discontinued | Discontinued |
| Expected discontinuance | — | Q4 2012 |
| Servicing status | End of Servicing Lifetime | End of Servicing Lifetime |
| Embedded options available | No | No |
| CPU | ||
| Cores | 4 | 6 |
| Threads | 8 | 12 |
| Multithreading (SMT/HT) | Yes | Yes |
| Base clock | 3.06 GHz | 2 GHz |
| Max boost clock | 3.46 GHz | 2.27 GHz |
| L3 cache | 12 MB | 18 MB |
| Bus speed | 6.4 GT/s | 6.4 GT/s |
| TDP | 95 W | 105 W |
| Turbo Boost | Yes (1) | Yes (1) |
| 64-bit support | Yes | Yes |
| Instruction set width | 64 bit | — |
| Instruction set extensions | SSE4.2 | — |
| QPI links | 2 | — |
| Memory | ||
| Max memory size | 288 GB | — |
| Memory types | DDR3 | — |
| Memory channels | 3 | — |
| Max memory bandwidth | 32 GB/s | — |
| ECC memory supported | Yes | — |
| Physical address extensions | 40-bit | — |
| Package and thermal | ||
| Sockets supported | FCLGA1366 | FCLGA1567 |
| Max CPU configuration | 2 | — |
| Package size | 42.5mm X 45mm | — |
| TCASE | 82.9 °C | — |
| Security and virtualization | ||
| Virtualization (VT-x / AMD-V) | Yes | Yes |
| Virtualization for Directed I/O (VT-d) | Yes | — |
| Extended Page Tables (EPT) | Yes | Yes |
| AES-NI | Yes | — |
| Execute Disable Bit | Yes | Yes |
| Intel Trusted Execution Technology | Yes | — |
| Technologies | ||
| Enhanced SpeedStep | Yes | Yes |
| Idle States | Yes | — |
| Thermal Monitoring Technologies | No | — |