Intel Core 2 Extreme QX9775 vs Intel Core 2 Quad Q8400
Physical Specifications
| Socket | Intel Socket 771 | Intel Socket 775 |
|---|---|---|
| Foundry | Intel | Intel |
| Process size | 45 nm | 45 nm |
| Transistors | 820 million | 456 million |
| Die size | 2x 107 mm² | 2x 82 mm² |
| Package | FC-LGA6 | FC-LGA6 |
| tCaseMax | 63°C | 71°C |
Performance
| Frequency | 3.2 GHz | 2.666 GHz |
|---|---|---|
| Turbo clock | — | — |
| Base clock | 400 MHz | 333 MHz |
| Multiplier | 8.0x | 8.0x |
| Multiplier unlocked | Yes | No |
| Voltage | 1.35 V | 1.11 V |
| TDP | 150 W | 95 W |
Architecture Details
| Vertical Segment | Desktop | Desktop |
|---|---|---|
| Production status | End-of-life | End-of-life |
| Release date | Mar 24th, 2008 | Apr 19th, 2009 |
| Codename | Yorkfield | Yorkfield |
| Generation | Core 2 Extreme | Core 2 Quad |
| Part | EU80574XL088N | SLGT6 |
| Memory support | DDR2 | DDR1, DDR2, DDR3 Dual-channel |
| ECC memory | No | No |
| PCI Express | — | Gen 2 |
Cores
| Total Cores | 4 | 4 |
|---|---|---|
| Total Threads | 4 | 4 |
| SMP # CPUs | 1 | 1 |
| Integrated graphics | — | — |
Cache
| Cache L1 | 64K (per core) | 64K (per core) |
|---|---|---|
| Cache L2 | 12MB (shared) | 4MB (shared) |
Notes
| Notes | Being an Extreme Edition processor, it features an unlocked FSB multiplier that allows users to set the multiplier value above its shipped value. Unlike the QX9770, this chip uses the LGA-771 socket and is only compatible with Intel D5400XS "Skulltrail", | — |
|---|
Features & Technologies
| EIST | Yes | Yes |
|---|---|---|
| Intel 64 | Yes | Yes |
| MMX | Yes | Yes |
| SSE | Yes | Yes |
| SSE2 | Yes | Yes |
| SSE3 | Yes | Yes |
| SSE4.1 | Yes | Yes |
| SSSE3 | Yes | — |
| VT-x | Yes | — |
| iAMT2 | — | Yes |
