Core Ultra 7 265KF vs Core 2 Quad Q8400s
Primary details
Comparing Core 2 Quad Q8400s and Core Ultra 7 265KF processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 82 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 99.21 |
| Market segment | Desktop processor | Desktop processor |
| Power efficiency | no data | 28.21 |
| Architecture codename | Yorkfield (2007−2009) | Arrow Lake-S (2024−2025) |
| Release date | 19 April 2009 (15 years ago) | 24 October 2024 (less than a year ago) |
| Launch price (MSRP) | no data | $379 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Core 2 Quad Q8400s and Core Ultra 7 265KF 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) | 20 (Icosa-Core) |
| Threads | 4 | 20 |
| Base clock speed | 2.66 GHz | 3.9 GHz |
| Boost clock speed | 0.67 GHz | 5.5 GHz |
| Bus rate | 1333 MHz | no data |
| L1 cache | 64 KB (per core) | 112 KB (per core) |
| L2 cache | 4 MB (shared) | 3 MB (per core) |
| L3 cache | 0 KB | 30 MB (shared) |
| Chip lithography | 45 nm | 3 nm |
| Die size | 2x 82 mm2 | 243 mm2 |
| Maximum case temperature (TCase) | 76 °C | no data |
| Number of transistors | 456 million | 17,800 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
| Unlocked multiplier | - | + |
| VID voltage range | 0.85V-1.3625V | no data |
Compatibility
Information on Core 2 Quad Q8400s and Core Ultra 7 265KF 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 | 1 |
| Socket | FCLGA775,LGA775 | 1851 |
| Power consumption (TDP) | 65 Watt | 125 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Quad Q8400s and Core Ultra 7 265KF. You'll probably need this information if you require some particular technology.
| AES-NI | - | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | - | no data |
| Hyper-Threading Technology | - | no data |
| TSX | - | + |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
| Demand Based Switching | - | no data |
Security technologies
Core 2 Quad Q8400s and Core Ultra 7 265KF technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | + |
| EDB | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Quad Q8400s and Core Ultra 7 265KF are enumerated here.
| VT-d | no data | + |
| VT-x | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q8400s and Core Ultra 7 265KF. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | N/A |
Peripherals
Specifications and connection of peripherals supported by Core 2 Quad Q8400s and Core Ultra 7 265KF.
| PCIe version | 2.0 | 5.0 |
| PCI Express lanes | no data | 20 |
Pros & cons summary
| Recency | 19 April 2009 | 24 October 2024 |
| Physical cores | 4 | 20 |
| Threads | 4 | 20 |
| Chip lithography | 45 nm | 3 nm |
| Power consumption (TDP) | 65 Watt | 125 Watt |
Core 2 Quad Q8400s has 92.3% lower power consumption.
Ultra 7 265KF, on the other hand, has an age advantage of 15 years, 400% more physical cores and 400% more threads, and a 1400% more advanced lithography process.
We couldn't decide between Core 2 Quad Q8400s and Core Ultra 7 265KF. We've got no test results to judge.
Should you still have questions on choice between Core 2 Quad Q8400s and Core Ultra 7 265KF, ask them in Comments section, and we shall answer.
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