Intel Core i7-990X vs Intel Xeon E3-1275
Physical Specifications
| Socket | Intel Socket 1366 | Intel Socket 1155 |
|---|---|---|
| Foundry | Intel | Intel |
| Process size | 32 nm | 32 nm |
| Transistors | 1,170 million | 1,160 million |
| Die size | 239 mm² | 216 mm² |
| Package | FC-LGA10 | FC-LGA10 |
Performance
| Frequency | 3.466 GHz | 3.4 GHz |
|---|---|---|
| Turbo clock | up to 3.733 GHz | up to 3.8 GHz |
| Base clock | 133 MHz | 100 MHz |
| Multiplier | 26.0x | 34.0x |
| Multiplier unlocked | Yes | No |
| Voltage | 1.375 V | — |
| TDP | 130 W | 95 W |
Architecture Details
| Vertical Segment | Desktop | Server/Workstation |
|---|---|---|
| Production status | End-of-life | End-of-life |
| Release date | Feb 24th, 2011 | Apr 3rd, 2011 |
| Codename | Gulftown | Sandy Bridge |
| Generation | Core i7 | Xeon E3 |
| Part | SLBVZ | SR00P |
| Memory support | DDR3 Triple-channel | DDR3 Dual-channel |
| ECC memory | No | Yes |
| PCI Express | Gen 2 | Gen 3, 16 Lanes(CPU only) |
Cores
| Total Cores | 6 | 4 |
|---|---|---|
| Total Threads | 12 | 8 |
| SMP # CPUs | 1 | 1 |
| Integrated graphics | — | Intel HD P3000 |
Cache
| Cache L1 | 64K (per core) | 64K (per core) |
|---|---|---|
| Cache L2 | 256K (per core) | 256K (per core) |
| Cache L3 | 12MB (shared) | 8MB (shared) |
Notes
| Notes | This processor comes with an unlocked FSB multiplier, allowing users to set the multiplier value higher than shipped value, to facilitate better overclocking. It is branded under the Extreme Edition label. | — |
|---|
Features & Technologies
| AES-NI | — | Yes |
|---|---|---|
| AVX | — | Yes |
| EIST | — | Yes |
| HTT | Yes | Yes |
| Intel 64 | Yes | Yes |
| MMX | Yes | Yes |
| SSE | Yes | Yes |
| SSE2 | Yes | Yes |
| SSE3 | Yes | Yes |
| SSE4.2 | Yes | Yes |
| SSSE3 | — | Yes |
| TXT | — | Yes |
| VT-d | — | Yes |
| VT-x | — | Yes |
| XD bit | — | Yes |
