Intel Core i7-4771 vs Intel Core i7-990X
Physical Specifications
| Socket | Intel Socket 1150 | Intel Socket 1366 |
|---|---|---|
| Foundry | Intel | Intel |
| Process size | 22 nm | 32 nm |
| Transistors | 1,400 million | 1,170 million |
| Die size | 177 mm² | 239 mm² |
| Package | — | FC-LGA10 |
| tCaseMax | 72°C | — |
Performance
| Frequency | 3.5 GHz | 3.466 GHz |
|---|---|---|
| Turbo clock | up to 3.9 GHz | up to 3.733 GHz |
| Base clock | 100 MHz | 133 MHz |
| Multiplier | 35.0x | 26.0x |
| Multiplier unlocked | No | Yes |
| TDP | 84 W | 130 W |
| Voltage | — | 1.375 V |
Architecture Details
| Vertical Segment | Desktop | Desktop |
|---|---|---|
| Production status | Active | End-of-life |
| Release date | Sep 1st, 2013 | Feb 24th, 2011 |
| Codename | Haswell | Gulftown |
| Generation | Core i7 | Core i7 |
| Part | SR1BW | SLBVZ |
| Memory support | DDR3 Dual-channel | DDR3 Triple-channel |
| ECC memory | No | No |
| PCI Express | Gen 3 | Gen 2 |
Cores
| Total Cores | 4 | 6 |
|---|---|---|
| Total Threads | 8 | 12 |
| SMP # CPUs | 1 | 1 |
| Integrated graphics | Intel HD 4600 | — |
Cache
| Cache L1 | 64K (per core) | 64K (per core) |
|---|---|---|
| Cache L2 | 256K (per core) | 256K (per core) |
| Cache L3 | 8MB (shared) | 12MB (shared) |
Features & Technologies
| AES-NI | Yes | — |
|---|---|---|
| AVX | Yes | — |
| AVX2 | Yes | — |
| BMI1 | Yes | — |
| BMI2 | Yes | — |
| Boost 2.0 | Yes | — |
| CLMUL | Yes | — |
| EIST | Yes | — |
| F16C | Yes | — |
| FMA3 | 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 | — |
| TSX | Yes | — |
| TXT | Yes | — |
| VT-d | Yes | — |
| VT-x | Yes | — |
| XD bit | Yes | — |
| vPro | Yes | — |
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. |
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