Xeon D-1813NT vs Core 2 Quad Q8400
Aggregate performance score
Xeon D-1813NT outperforms Core 2 Quad Q8400 by a whopping 274% based on our aggregate benchmark results.
Primary details
Comparing Core 2 Quad Q8400 and Xeon D-1813NT processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2263 | 1231 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Server |
| Power efficiency | 1.30 | 10.96 |
| Architecture codename | Yorkfield (2007−2009) | no data |
| Release date | 19 April 2009 (15 years ago) | 1 October 2023 (1 year ago) |
Detailed specifications
Core 2 Quad Q8400 and Xeon D-1813NT 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) | 4 (Quad-Core) |
| Threads | 4 | 8 |
| Base clock speed | 2.66 GHz | 2.2 GHz |
| Boost clock speed | 0.67 GHz | 2.4 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 | 10240 KB |
| Chip lithography | 45 nm | no data |
| Die size | 2x 82 mm2 | no data |
| 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 D-1813NT 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 | FCBGA2227 |
| Power consumption (TDP) | 95 Watt | 42 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Quad Q8400 and Xeon D-1813NT. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® AVX-512 |
| AES-NI | - | + |
| Enhanced SpeedStep (EIST) | + | + |
| QuickAssist | no data | + |
| Turbo Boost Technology | - | 2.0 |
| Hyper-Threading Technology | - | + |
| 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 D-1813NT technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | - |
| EDB | + | + |
| SGX | no data | Yes with Intel® SPS |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Quad Q8400 and Xeon D-1813NT are enumerated here.
| VT-d | no data | + |
| VT-x | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q8400 and Xeon D-1813NT. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR4 |
| Maximum memory size | no data | 256 GB |
| Max memory channels | no data | 2 |
| 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 D-1813NT.
| PCIe version | 2.0 | 4.0 |
| PCI Express lanes | no data | 16 |
| USB revision | no data | 3.0 |
| Max number of SATA 6 Gb/s Ports | no data | 24 |
| Number of USB ports | no data | 4 |
| Integrated LAN | no data | + |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Pros & cons summary
| Performance score | 1.35 | 5.05 |
| Recency | 19 April 2009 | 1 October 2023 |
| Threads | 4 | 8 |
| Power consumption (TDP) | 95 Watt | 42 Watt |
Xeon D-1813NT has a 274.1% higher aggregate performance score, an age advantage of 14 years, 100% more threads, and 126.2% lower power consumption.
The Xeon D-1813NT is our recommended choice as it beats the Core 2 Quad Q8400 in performance tests.
Note that Core 2 Quad Q8400 is a desktop processor while Xeon D-1813NT is a server/workstation one.
Should you still have questions on choice between Core 2 Quad Q8400 and Xeon D-1813NT, ask them in Comments section, and we shall answer.
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