Xeon 6774P vs Core 2 Quad Q8400
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2591 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Server |
| Power efficiency | 0.53 | no data |
| Designer | Intel | Intel |
| Manufacturer | Intel | no data |
| Architecture codename | Yorkfield (2007−2009) | no data |
| Release date | 19 April 2009 (16 years ago) | 1 April 2025 (1 year ago) |
Detailed specifications
Core 2 Quad Q8400 and Xeon 6774P basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 4 (Quad-Core) | 64 (Tetrahexaconta-Core) |
| Threads | 4 | 128 |
| Base clock speed | 2.66 GHz | 2.5 GHz |
| Boost clock speed | 0.67 GHz | 3.9 GHz |
| Bus rate | 1333 MHz | no data |
| L1 cache | 64 KB (per core) | no data |
| L2 cache | 4 MB (shared) | no data |
| L3 cache | 0 KB | 336 MB |
| Chip lithography | 45 nm | Intel 3 nm |
| Die size | 2x 82 mm2 | no data |
| Maximum core temperature | no data | 81 °C |
| Maximum case temperature (TCase) | 71 °C | no data |
| Number of transistors | 456 million | no data |
| 64 bit support | + | - |
| Windows 11 compatibility | - | no data |
| VID voltage range | 0.85V-1.3625V | no data |
Compatibility
Information on Core 2 Quad Q8400 and Xeon 6774P compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Number of CPUs in a configuration | 1 | no data |
| Socket | FCLGA775,LGA775 | FCLGA4710 |
| Power consumption (TDP) | 95 Watt | 350 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Quad Q8400 and Xeon 6774P. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® AMX, Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512 |
| AES-NI | - | + |
| Enhanced SpeedStep (EIST) | + | no data |
| Speed Shift | no data | + |
| Turbo Boost Technology | - | 2.0 |
| Hyper-Threading Technology | - | + |
| TSX | - | + |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
| Demand Based Switching | - | no data |
| FSB parity | - | no data |
| Deep Learning Boost | - | + |
Security technologies
Core 2 Quad Q8400 and Xeon 6774P technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | + |
| EDB | + | + |
| SGX | no data | + |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Quad Q8400 and Xeon 6774P are enumerated here.
| VT-d | no data | + |
| VT-x | + | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q8400 and Xeon 6774P. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR5(6400MT/s), MRDIMM(8800MT/s) |
| Maximum memory size | no data | 4 TB |
| Max memory channels | no data | 8 |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | no data |
Peripherals
Specifications and connection of peripherals supported by Core 2 Quad Q8400 and Xeon 6774P.
| PCIe version | 2.0 | 5.0 |
| PCI Express lanes | no data | 136 |
Pros & cons summary
| Recency | 19 April 2009 | 1 April 2025 |
| Physical cores | 4 | 64 |
| Threads | 4 | 128 |
| Power consumption (TDP) | 95 Watt | 350 Watt |
Core 2 Quad Q8400 has 268% lower power consumption.
Xeon 6774P, on the other hand, has an age advantage of 15 years, and 1500% more physical cores and 3100% more threads.
We couldn't decide between Intel Core 2 Quad Q8400 and Intel Xeon 6774P. We've got no test results to judge.
Note that Core 2 Quad Q8400 is a desktop processor while Xeon 6774P is a server/workstation one.
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